Merge commit '574585fa78070b0cc6b5ad22543e21a3502a122b' as 'libxml2'

1 files changed, 11059 insertions, 0 deletions

diff --git a/libxml2/relaxng.c b/libxml2/relaxng.c
new file mode 100644
index 0000000..3d3e69c
--- /dev/null
+++ b/libxml2/relaxng.c
@@ -0,0 +1,11059 @@
+/*
+ * relaxng.c : implementation of the Relax-NG handling and validity checking
+ *
+ * See Copyright for the status of this software.
+ *
+ * Daniel Veillard <veillard@redhat.com>
+ */
+
+/**
+ * TODO:
+ * - add support for DTD compatibility spec
+ *   http://www.oasis-open.org/committees/relax-ng/compatibility-20011203.html
+ * - report better mem allocations pbms at runtime and abort immediately.
+ */
+
+#define IN_LIBXML
+#include "libxml.h"
+
+#ifdef LIBXML_SCHEMAS_ENABLED
+
+#include <string.h>
+#include <stdio.h>
+#include <libxml/xmlmemory.h>
+#include <libxml/parser.h>
+#include <libxml/parserInternals.h>
+#include <libxml/hash.h>
+#include <libxml/uri.h>
+
+#include <libxml/relaxng.h>
+
+#include <libxml/xmlschemastypes.h>
+#include <libxml/xmlautomata.h>
+#include <libxml/xmlregexp.h>
+#include <libxml/xmlschemastypes.h>
+
+/*
+ * The Relax-NG namespace
+ */
+static const xmlChar *xmlRelaxNGNs = (const xmlChar *)
+    "http://relaxng.org/ns/structure/1.0";
+
+#define IS_RELAXNG(node, typ)						\
+   ((node != NULL) && (node->ns != NULL) &&				\
+    (node->type == XML_ELEMENT_NODE) &&					\
+    (xmlStrEqual(node->name, (const xmlChar *) typ)) &&		\
+    (xmlStrEqual(node->ns->href, xmlRelaxNGNs)))
+
+
+#if 0
+#define DEBUG 1
+
+#define DEBUG_GRAMMAR 1
+
+#define DEBUG_CONTENT 1
+
+#define DEBUG_TYPE 1
+
+#define DEBUG_VALID 1
+
+#define DEBUG_INTERLEAVE 1
+
+#define DEBUG_LIST 1
+
+#define DEBUG_INCLUDE 1
+
+#define DEBUG_ERROR 1
+
+#define DEBUG_COMPILE 1
+
+#define DEBUG_PROGRESSIVE 1
+#endif
+
+#define MAX_ERROR 5
+
+#define TODO								\
+    xmlGenericError(xmlGenericErrorContext,				\
+	    "Unimplemented block at %s:%d\n",				\
+            __FILE__, __LINE__);
+
+typedef struct _xmlRelaxNGSchema xmlRelaxNGSchema;
+typedef xmlRelaxNGSchema *xmlRelaxNGSchemaPtr;
+
+typedef struct _xmlRelaxNGDefine xmlRelaxNGDefine;
+typedef xmlRelaxNGDefine *xmlRelaxNGDefinePtr;
+
+typedef struct _xmlRelaxNGDocument xmlRelaxNGDocument;
+typedef xmlRelaxNGDocument *xmlRelaxNGDocumentPtr;
+
+typedef struct _xmlRelaxNGInclude xmlRelaxNGInclude;
+typedef xmlRelaxNGInclude *xmlRelaxNGIncludePtr;
+
+typedef enum {
+    XML_RELAXNG_COMBINE_UNDEFINED = 0,  /* undefined */
+    XML_RELAXNG_COMBINE_CHOICE, /* choice */
+    XML_RELAXNG_COMBINE_INTERLEAVE      /* interleave */
+} xmlRelaxNGCombine;
+
+typedef enum {
+    XML_RELAXNG_CONTENT_ERROR = -1,
+    XML_RELAXNG_CONTENT_EMPTY = 0,
+    XML_RELAXNG_CONTENT_SIMPLE,
+    XML_RELAXNG_CONTENT_COMPLEX
+} xmlRelaxNGContentType;
+
+typedef struct _xmlRelaxNGGrammar xmlRelaxNGGrammar;
+typedef xmlRelaxNGGrammar *xmlRelaxNGGrammarPtr;
+
+struct _xmlRelaxNGGrammar {
+    xmlRelaxNGGrammarPtr parent;        /* the parent grammar if any */
+    xmlRelaxNGGrammarPtr children;      /* the children grammar if any */
+    xmlRelaxNGGrammarPtr next;  /* the next grammar if any */
+    xmlRelaxNGDefinePtr start;  /* <start> content */
+    xmlRelaxNGCombine combine;  /* the default combine value */
+    xmlRelaxNGDefinePtr startList;      /* list of <start> definitions */
+    xmlHashTablePtr defs;       /* define* */
+    xmlHashTablePtr refs;       /* references */
+};
+
+
+typedef enum {
+    XML_RELAXNG_NOOP = -1,      /* a no operation from simplification  */
+    XML_RELAXNG_EMPTY = 0,      /* an empty pattern */
+    XML_RELAXNG_NOT_ALLOWED,    /* not allowed top */
+    XML_RELAXNG_EXCEPT,         /* except present in nameclass defs */
+    XML_RELAXNG_TEXT,           /* textual content */
+    XML_RELAXNG_ELEMENT,        /* an element */
+    XML_RELAXNG_DATATYPE,       /* extenal data type definition */
+    XML_RELAXNG_PARAM,          /* extenal data type parameter */
+    XML_RELAXNG_VALUE,          /* value from an extenal data type definition */
+    XML_RELAXNG_LIST,           /* a list of patterns */
+    XML_RELAXNG_ATTRIBUTE,      /* an attrbute following a pattern */
+    XML_RELAXNG_DEF,            /* a definition */
+    XML_RELAXNG_REF,            /* reference to a definition */
+    XML_RELAXNG_EXTERNALREF,    /* reference to an external def */
+    XML_RELAXNG_PARENTREF,      /* reference to a def in the parent grammar */
+    XML_RELAXNG_OPTIONAL,       /* optional patterns */
+    XML_RELAXNG_ZEROORMORE,     /* zero or more non empty patterns */
+    XML_RELAXNG_ONEORMORE,      /* one or more non empty patterns */
+    XML_RELAXNG_CHOICE,         /* a choice between non empty patterns */
+    XML_RELAXNG_GROUP,          /* a pair/group of non empty patterns */
+    XML_RELAXNG_INTERLEAVE,     /* interleaving choice of non-empty patterns */
+    XML_RELAXNG_START           /* Used to keep track of starts on grammars */
+} xmlRelaxNGType;
+
+#define IS_NULLABLE		(1 << 0)
+#define IS_NOT_NULLABLE		(1 << 1)
+#define IS_INDETERMINIST	(1 << 2)
+#define IS_MIXED		(1 << 3)
+#define IS_TRIABLE		(1 << 4)
+#define IS_PROCESSED		(1 << 5)
+#define IS_COMPILABLE		(1 << 6)
+#define IS_NOT_COMPILABLE	(1 << 7)
+#define IS_EXTERNAL_REF	        (1 << 8)
+
+struct _xmlRelaxNGDefine {
+    xmlRelaxNGType type;        /* the type of definition */
+    xmlNodePtr node;            /* the node in the source */
+    xmlChar *name;              /* the element local name if present */
+    xmlChar *ns;                /* the namespace local name if present */
+    xmlChar *value;             /* value when available */
+    void *data;                 /* data lib or specific pointer */
+    xmlRelaxNGDefinePtr content;        /* the expected content */
+    xmlRelaxNGDefinePtr parent; /* the parent definition, if any */
+    xmlRelaxNGDefinePtr next;   /* list within grouping sequences */
+    xmlRelaxNGDefinePtr attrs;  /* list of attributes for elements */
+    xmlRelaxNGDefinePtr nameClass;      /* the nameClass definition if any */
+    xmlRelaxNGDefinePtr nextHash;       /* next define in defs/refs hash tables */
+    short depth;                /* used for the cycle detection */
+    short dflags;               /* define related flags */
+    xmlRegexpPtr contModel;     /* a compiled content model if available */
+};
+
+/**
+ * _xmlRelaxNG:
+ *
+ * A RelaxNGs definition
+ */
+struct _xmlRelaxNG {
+    void *_private;             /* unused by the library for users or bindings */
+    xmlRelaxNGGrammarPtr topgrammar;
+    xmlDocPtr doc;
+
+    int idref;                  /* requires idref checking */
+
+    xmlHashTablePtr defs;       /* define */
+    xmlHashTablePtr refs;       /* references */
+    xmlRelaxNGDocumentPtr documents;    /* all the documents loaded */
+    xmlRelaxNGIncludePtr includes;      /* all the includes loaded */
+    int defNr;                  /* number of defines used */
+    xmlRelaxNGDefinePtr *defTab;        /* pointer to the allocated definitions */
+
+};
+
+#define XML_RELAXNG_IN_ATTRIBUTE	(1 << 0)
+#define XML_RELAXNG_IN_ONEORMORE	(1 << 1)
+#define XML_RELAXNG_IN_LIST		(1 << 2)
+#define XML_RELAXNG_IN_DATAEXCEPT	(1 << 3)
+#define XML_RELAXNG_IN_START		(1 << 4)
+#define XML_RELAXNG_IN_OOMGROUP		(1 << 5)
+#define XML_RELAXNG_IN_OOMINTERLEAVE	(1 << 6)
+#define XML_RELAXNG_IN_EXTERNALREF	(1 << 7)
+#define XML_RELAXNG_IN_ANYEXCEPT	(1 << 8)
+#define XML_RELAXNG_IN_NSEXCEPT		(1 << 9)
+
+struct _xmlRelaxNGParserCtxt {
+    void *userData;             /* user specific data block */
+    xmlRelaxNGValidityErrorFunc error;  /* the callback in case of errors */
+    xmlRelaxNGValidityWarningFunc warning;      /* the callback in case of warning */
+    xmlStructuredErrorFunc serror;
+    xmlRelaxNGValidErr err;
+
+    xmlRelaxNGPtr schema;       /* The schema in use */
+    xmlRelaxNGGrammarPtr grammar;       /* the current grammar */
+    xmlRelaxNGGrammarPtr parentgrammar; /* the parent grammar */
+    int flags;                  /* parser flags */
+    int nbErrors;               /* number of errors at parse time */
+    int nbWarnings;             /* number of warnings at parse time */
+    const xmlChar *define;      /* the current define scope */
+    xmlRelaxNGDefinePtr def;    /* the current define */
+
+    int nbInterleaves;
+    xmlHashTablePtr interleaves;        /* keep track of all the interleaves */
+
+    xmlRelaxNGDocumentPtr documents;    /* all the documents loaded */
+    xmlRelaxNGIncludePtr includes;      /* all the includes loaded */
+    xmlChar *URL;
+    xmlDocPtr document;
+
+    int defNr;                  /* number of defines used */
+    int defMax;                 /* number of defines aloocated */
+    xmlRelaxNGDefinePtr *defTab;        /* pointer to the allocated definitions */
+
+    const char *buffer;
+    int size;
+
+    /* the document stack */
+    xmlRelaxNGDocumentPtr doc;  /* Current parsed external ref */
+    int docNr;                  /* Depth of the parsing stack */
+    int docMax;                 /* Max depth of the parsing stack */
+    xmlRelaxNGDocumentPtr *docTab;      /* array of docs */
+
+    /* the include stack */
+    xmlRelaxNGIncludePtr inc;   /* Current parsed include */
+    int incNr;                  /* Depth of the include parsing stack */
+    int incMax;                 /* Max depth of the parsing stack */
+    xmlRelaxNGIncludePtr *incTab;       /* array of incs */
+
+    int idref;                  /* requires idref checking */
+
+    /* used to compile content models */
+    xmlAutomataPtr am;          /* the automata */
+    xmlAutomataStatePtr state;  /* used to build the automata */
+
+    int crng;			/* compact syntax and other flags */
+    int freedoc;		/* need to free the document */
+};
+
+#define FLAGS_IGNORABLE		1
+#define FLAGS_NEGATIVE		2
+#define FLAGS_MIXED_CONTENT	4
+#define FLAGS_NOERROR		8
+
+/**
+ * xmlRelaxNGInterleaveGroup:
+ *
+ * A RelaxNGs partition set associated to lists of definitions
+ */
+typedef struct _xmlRelaxNGInterleaveGroup xmlRelaxNGInterleaveGroup;
+typedef xmlRelaxNGInterleaveGroup *xmlRelaxNGInterleaveGroupPtr;
+struct _xmlRelaxNGInterleaveGroup {
+    xmlRelaxNGDefinePtr rule;   /* the rule to satisfy */
+    xmlRelaxNGDefinePtr *defs;  /* the array of element definitions */
+    xmlRelaxNGDefinePtr *attrs; /* the array of attributes definitions */
+};
+
+#define IS_DETERMINIST		1
+#define IS_NEEDCHECK		2
+
+/**
+ * xmlRelaxNGPartitions:
+ *
+ * A RelaxNGs partition associated to an interleave group
+ */
+typedef struct _xmlRelaxNGPartition xmlRelaxNGPartition;
+typedef xmlRelaxNGPartition *xmlRelaxNGPartitionPtr;
+struct _xmlRelaxNGPartition {
+    int nbgroups;               /* number of groups in the partitions */
+    xmlHashTablePtr triage;     /* hash table used to direct nodes to the
+                                 * right group when possible */
+    int flags;                  /* determinist ? */
+    xmlRelaxNGInterleaveGroupPtr *groups;
+};
+
+/**
+ * xmlRelaxNGValidState:
+ *
+ * A RelaxNGs validation state
+ */
+#define MAX_ATTR 20
+typedef struct _xmlRelaxNGValidState xmlRelaxNGValidState;
+typedef xmlRelaxNGValidState *xmlRelaxNGValidStatePtr;
+struct _xmlRelaxNGValidState {
+    xmlNodePtr node;            /* the current node */
+    xmlNodePtr seq;             /* the sequence of children left to validate */
+    int nbAttrs;                /* the number of attributes */
+    int maxAttrs;               /* the size of attrs */
+    int nbAttrLeft;             /* the number of attributes left to validate */
+    xmlChar *value;             /* the value when operating on string */
+    xmlChar *endvalue;          /* the end value when operating on string */
+    xmlAttrPtr *attrs;          /* the array of attributes */
+};
+
+/**
+ * xmlRelaxNGStates:
+ *
+ * A RelaxNGs container for validation state
+ */
+typedef struct _xmlRelaxNGStates xmlRelaxNGStates;
+typedef xmlRelaxNGStates *xmlRelaxNGStatesPtr;
+struct _xmlRelaxNGStates {
+    int nbState;                /* the number of states */
+    int maxState;               /* the size of the array */
+    xmlRelaxNGValidStatePtr *tabState;
+};
+
+#define ERROR_IS_DUP	1
+
+/**
+ * xmlRelaxNGValidError:
+ *
+ * A RelaxNGs validation error
+ */
+typedef struct _xmlRelaxNGValidError xmlRelaxNGValidError;
+typedef xmlRelaxNGValidError *xmlRelaxNGValidErrorPtr;
+struct _xmlRelaxNGValidError {
+    xmlRelaxNGValidErr err;     /* the error number */
+    int flags;                  /* flags */
+    xmlNodePtr node;            /* the current node */
+    xmlNodePtr seq;             /* the current child */
+    const xmlChar *arg1;        /* first arg */
+    const xmlChar *arg2;        /* second arg */
+};
+
+/**
+ * xmlRelaxNGValidCtxt:
+ *
+ * A RelaxNGs validation context
+ */
+
+struct _xmlRelaxNGValidCtxt {
+    void *userData;             /* user specific data block */
+    xmlRelaxNGValidityErrorFunc error;  /* the callback in case of errors */
+    xmlRelaxNGValidityWarningFunc warning;      /* the callback in case of warning */
+    xmlStructuredErrorFunc serror;
+    int nbErrors;               /* number of errors in validation */
+
+    xmlRelaxNGPtr schema;       /* The schema in use */
+    xmlDocPtr doc;              /* the document being validated */
+    int flags;                  /* validation flags */
+    int depth;                  /* validation depth */
+    int idref;                  /* requires idref checking */
+    int errNo;                  /* the first error found */
+
+    /*
+     * Errors accumulated in branches may have to be stacked to be
+     * provided back when it's sure they affect validation.
+     */
+    xmlRelaxNGValidErrorPtr err;        /* Last error */
+    int errNr;                  /* Depth of the error stack */
+    int errMax;                 /* Max depth of the error stack */
+    xmlRelaxNGValidErrorPtr errTab;     /* stack of errors */
+
+    xmlRelaxNGValidStatePtr state;      /* the current validation state */
+    xmlRelaxNGStatesPtr states; /* the accumulated state list */
+
+    xmlRelaxNGStatesPtr freeState;      /* the pool of free valid states */
+    int freeStatesNr;
+    int freeStatesMax;
+    xmlRelaxNGStatesPtr *freeStates;    /* the pool of free state groups */
+
+    /*
+     * This is used for "progressive" validation
+     */
+    xmlRegExecCtxtPtr elem;     /* the current element regexp */
+    int elemNr;                 /* the number of element validated */
+    int elemMax;                /* the max depth of elements */
+    xmlRegExecCtxtPtr *elemTab; /* the stack of regexp runtime */
+    int pstate;                 /* progressive state */
+    xmlNodePtr pnode;           /* the current node */
+    xmlRelaxNGDefinePtr pdef;   /* the non-streamable definition */
+    int perr;                   /* signal error in content model
+                                 * outside the regexp */
+};
+
+/**
+ * xmlRelaxNGInclude:
+ *
+ * Structure associated to a RelaxNGs document element
+ */
+struct _xmlRelaxNGInclude {
+    xmlRelaxNGIncludePtr next;  /* keep a chain of includes */
+    xmlChar *href;              /* the normalized href value */
+    xmlDocPtr doc;              /* the associated XML document */
+    xmlRelaxNGDefinePtr content;        /* the definitions */
+    xmlRelaxNGPtr schema;       /* the schema */
+};
+
+/**
+ * xmlRelaxNGDocument:
+ *
+ * Structure associated to a RelaxNGs document element
+ */
+struct _xmlRelaxNGDocument {
+    xmlRelaxNGDocumentPtr next; /* keep a chain of documents */
+    xmlChar *href;              /* the normalized href value */
+    xmlDocPtr doc;              /* the associated XML document */
+    xmlRelaxNGDefinePtr content;        /* the definitions */
+    xmlRelaxNGPtr schema;       /* the schema */
+    int externalRef;            /* 1 if an external ref */
+};
+
+
+/************************************************************************
+ *									*
+ *		Some factorized error routines				*
+ *									*
+ ************************************************************************/
+
+/**
+ * xmlRngPErrMemory:
+ * @ctxt:  an Relax-NG parser context
+ * @extra:  extra informations
+ *
+ * Handle a redefinition of attribute error
+ */
+static void
+xmlRngPErrMemory(xmlRelaxNGParserCtxtPtr ctxt, const char *extra)
+{
+    xmlStructuredErrorFunc schannel = NULL;
+    xmlGenericErrorFunc channel = NULL;
+    void *data = NULL;
+
+    if (ctxt != NULL) {
+        if (ctxt->serror != NULL)
+	    schannel = ctxt->serror;
+	else
+	    channel = ctxt->error;
+        data = ctxt->userData;
+        ctxt->nbErrors++;
+    }
+    if (extra)
+        __xmlRaiseError(schannel, channel, data,
+                        NULL, NULL, XML_FROM_RELAXNGP,
+                        XML_ERR_NO_MEMORY, XML_ERR_FATAL, NULL, 0, extra,
+                        NULL, NULL, 0, 0,
+                        "Memory allocation failed : %s\n", extra);
+    else
+        __xmlRaiseError(schannel, channel, data,
+                        NULL, NULL, XML_FROM_RELAXNGP,
+                        XML_ERR_NO_MEMORY, XML_ERR_FATAL, NULL, 0, NULL,
+                        NULL, NULL, 0, 0, "Memory allocation failed\n");
+}
+
+/**
+ * xmlRngVErrMemory:
+ * @ctxt:  a Relax-NG validation context
+ * @extra:  extra informations
+ *
+ * Handle a redefinition of attribute error
+ */
+static void
+xmlRngVErrMemory(xmlRelaxNGValidCtxtPtr ctxt, const char *extra)
+{
+    xmlStructuredErrorFunc schannel = NULL;
+    xmlGenericErrorFunc channel = NULL;
+    void *data = NULL;
+
+    if (ctxt != NULL) {
+        if (ctxt->serror != NULL)
+	    schannel = ctxt->serror;
+	else
+	    channel = ctxt->error;
+        data = ctxt->userData;
+        ctxt->nbErrors++;
+    }
+    if (extra)
+        __xmlRaiseError(schannel, channel, data,
+                        NULL, NULL, XML_FROM_RELAXNGV,
+                        XML_ERR_NO_MEMORY, XML_ERR_FATAL, NULL, 0, extra,
+                        NULL, NULL, 0, 0,
+                        "Memory allocation failed : %s\n", extra);
+    else
+        __xmlRaiseError(schannel, channel, data,
+                        NULL, NULL, XML_FROM_RELAXNGV,
+                        XML_ERR_NO_MEMORY, XML_ERR_FATAL, NULL, 0, NULL,
+                        NULL, NULL, 0, 0, "Memory allocation failed\n");
+}
+
+/**
+ * xmlRngPErr:
+ * @ctxt:  a Relax-NG parser context
+ * @node:  the node raising the error
+ * @error:  the error code
+ * @msg:  message
+ * @str1:  extra info
+ * @str2:  extra info
+ *
+ * Handle a Relax NG Parsing error
+ */
+static void LIBXML_ATTR_FORMAT(4,0)
+xmlRngPErr(xmlRelaxNGParserCtxtPtr ctxt, xmlNodePtr node, int error,
+           const char *msg, const xmlChar * str1, const xmlChar * str2)
+{
+    xmlStructuredErrorFunc schannel = NULL;
+    xmlGenericErrorFunc channel = NULL;
+    void *data = NULL;
+
+    if (ctxt != NULL) {
+        if (ctxt->serror != NULL)
+	    schannel = ctxt->serror;
+	else
+	    channel = ctxt->error;
+        data = ctxt->userData;
+        ctxt->nbErrors++;
+    }
+    __xmlRaiseError(schannel, channel, data,
+                    NULL, node, XML_FROM_RELAXNGP,
+                    error, XML_ERR_ERROR, NULL, 0,
+                    (const char *) str1, (const char *) str2, NULL, 0, 0,
+                    msg, str1, str2);
+}
+
+/**
+ * xmlRngVErr:
+ * @ctxt:  a Relax-NG validation context
+ * @node:  the node raising the error
+ * @error:  the error code
+ * @msg:  message
+ * @str1:  extra info
+ * @str2:  extra info
+ *
+ * Handle a Relax NG Validation error
+ */
+static void LIBXML_ATTR_FORMAT(4,0)
+xmlRngVErr(xmlRelaxNGValidCtxtPtr ctxt, xmlNodePtr node, int error,
+           const char *msg, const xmlChar * str1, const xmlChar * str2)
+{
+    xmlStructuredErrorFunc schannel = NULL;
+    xmlGenericErrorFunc channel = NULL;
+    void *data = NULL;
+
+    if (ctxt != NULL) {
+        if (ctxt->serror != NULL)
+	    schannel = ctxt->serror;
+	else
+	    channel = ctxt->error;
+        data = ctxt->userData;
+        ctxt->nbErrors++;
+    }
+    __xmlRaiseError(schannel, channel, data,
+                    NULL, node, XML_FROM_RELAXNGV,
+                    error, XML_ERR_ERROR, NULL, 0,
+                    (const char *) str1, (const char *) str2, NULL, 0, 0,
+                    msg, str1, str2);
+}
+
+/************************************************************************
+ *									*
+ *		Preliminary type checking interfaces			*
+ *									*
+ ************************************************************************/
+
+/**
+ * xmlRelaxNGTypeHave:
+ * @data:  data needed for the library
+ * @type:  the type name
+ * @value:  the value to check
+ *
+ * Function provided by a type library to check if a type is exported
+ *
+ * Returns 1 if yes, 0 if no and -1 in case of error.
+ */
+typedef int (*xmlRelaxNGTypeHave) (void *data, const xmlChar * type);
+
+/**
+ * xmlRelaxNGTypeCheck:
+ * @data:  data needed for the library
+ * @type:  the type name
+ * @value:  the value to check
+ * @result:  place to store the result if needed
+ *
+ * Function provided by a type library to check if a value match a type
+ *
+ * Returns 1 if yes, 0 if no and -1 in case of error.
+ */
+typedef int (*xmlRelaxNGTypeCheck) (void *data, const xmlChar * type,
+                                    const xmlChar * value, void **result,
+                                    xmlNodePtr node);
+
+/**
+ * xmlRelaxNGFacetCheck:
+ * @data:  data needed for the library
+ * @type:  the type name
+ * @facet:  the facet name
+ * @val:  the facet value
+ * @strval:  the string value
+ * @value:  the value to check
+ *
+ * Function provided by a type library to check a value facet
+ *
+ * Returns 1 if yes, 0 if no and -1 in case of error.
+ */
+typedef int (*xmlRelaxNGFacetCheck) (void *data, const xmlChar * type,
+                                     const xmlChar * facet,
+                                     const xmlChar * val,
+                                     const xmlChar * strval, void *value);
+
+/**
+ * xmlRelaxNGTypeFree:
+ * @data:  data needed for the library
+ * @result:  the value to free
+ *
+ * Function provided by a type library to free a returned result
+ */
+typedef void (*xmlRelaxNGTypeFree) (void *data, void *result);
+
+/**
+ * xmlRelaxNGTypeCompare:
+ * @data:  data needed for the library
+ * @type:  the type name
+ * @value1:  the first value
+ * @value2:  the second value
+ *
+ * Function provided by a type library to compare two values accordingly
+ * to a type.
+ *
+ * Returns 1 if yes, 0 if no and -1 in case of error.
+ */
+typedef int (*xmlRelaxNGTypeCompare) (void *data, const xmlChar * type,
+                                      const xmlChar * value1,
+                                      xmlNodePtr ctxt1,
+                                      void *comp1,
+                                      const xmlChar * value2,
+                                      xmlNodePtr ctxt2);
+typedef struct _xmlRelaxNGTypeLibrary xmlRelaxNGTypeLibrary;
+typedef xmlRelaxNGTypeLibrary *xmlRelaxNGTypeLibraryPtr;
+struct _xmlRelaxNGTypeLibrary {
+    const xmlChar *namespace;   /* the datatypeLibrary value */
+    void *data;                 /* data needed for the library */
+    xmlRelaxNGTypeHave have;    /* the export function */
+    xmlRelaxNGTypeCheck check;  /* the checking function */
+    xmlRelaxNGTypeCompare comp; /* the compare function */
+    xmlRelaxNGFacetCheck facet; /* the facet check function */
+    xmlRelaxNGTypeFree freef;   /* the freeing function */
+};
+
+/************************************************************************
+ *									*
+ *			Allocation functions				*
+ *									*
+ ************************************************************************/
+static void xmlRelaxNGFreeGrammar(xmlRelaxNGGrammarPtr grammar);
+static void xmlRelaxNGFreeDefine(xmlRelaxNGDefinePtr define);
+static void xmlRelaxNGNormExtSpace(xmlChar * value);
+static void xmlRelaxNGFreeInnerSchema(xmlRelaxNGPtr schema);
+static int xmlRelaxNGEqualValidState(xmlRelaxNGValidCtxtPtr ctxt
+                                     ATTRIBUTE_UNUSED,
+                                     xmlRelaxNGValidStatePtr state1,
+                                     xmlRelaxNGValidStatePtr state2);
+static void xmlRelaxNGFreeValidState(xmlRelaxNGValidCtxtPtr ctxt,
+                                     xmlRelaxNGValidStatePtr state);
+
+/**
+ * xmlRelaxNGFreeDocument:
+ * @docu:  a document structure
+ *
+ * Deallocate a RelaxNG document structure.
+ */
+static void
+xmlRelaxNGFreeDocument(xmlRelaxNGDocumentPtr docu)
+{
+    if (docu == NULL)
+        return;
+
+    if (docu->href != NULL)
+        xmlFree(docu->href);
+    if (docu->doc != NULL)
+        xmlFreeDoc(docu->doc);
+    if (docu->schema != NULL)
+        xmlRelaxNGFreeInnerSchema(docu->schema);
+    xmlFree(docu);
+}
+
+/**
+ * xmlRelaxNGFreeDocumentList:
+ * @docu:  a list of  document structure
+ *
+ * Deallocate a RelaxNG document structures.
+ */
+static void
+xmlRelaxNGFreeDocumentList(xmlRelaxNGDocumentPtr docu)
+{
+    xmlRelaxNGDocumentPtr next;
+
+    while (docu != NULL) {
+        next = docu->next;
+        xmlRelaxNGFreeDocument(docu);
+        docu = next;
+    }
+}
+
+/**
+ * xmlRelaxNGFreeInclude:
+ * @incl:  a include structure
+ *
+ * Deallocate a RelaxNG include structure.
+ */
+static void
+xmlRelaxNGFreeInclude(xmlRelaxNGIncludePtr incl)
+{
+    if (incl == NULL)
+        return;
+
+    if (incl->href != NULL)
+        xmlFree(incl->href);
+    if (incl->doc != NULL)
+        xmlFreeDoc(incl->doc);
+    if (incl->schema != NULL)
+        xmlRelaxNGFree(incl->schema);
+    xmlFree(incl);
+}
+
+/**
+ * xmlRelaxNGFreeIncludeList:
+ * @incl:  a include structure list
+ *
+ * Deallocate a RelaxNG include structure.
+ */
+static void
+xmlRelaxNGFreeIncludeList(xmlRelaxNGIncludePtr incl)
+{
+    xmlRelaxNGIncludePtr next;
+
+    while (incl != NULL) {
+        next = incl->next;
+        xmlRelaxNGFreeInclude(incl);
+        incl = next;
+    }
+}
+
+/**
+ * xmlRelaxNGNewRelaxNG:
+ * @ctxt:  a Relax-NG validation context (optional)
+ *
+ * Allocate a new RelaxNG structure.
+ *
+ * Returns the newly allocated structure or NULL in case or error
+ */
+static xmlRelaxNGPtr
+xmlRelaxNGNewRelaxNG(xmlRelaxNGParserCtxtPtr ctxt)
+{
+    xmlRelaxNGPtr ret;
+
+    ret = (xmlRelaxNGPtr) xmlMalloc(sizeof(xmlRelaxNG));
+    if (ret == NULL) {
+        xmlRngPErrMemory(ctxt, NULL);
+        return (NULL);
+    }
+    memset(ret, 0, sizeof(xmlRelaxNG));
+
+    return (ret);
+}
+
+/**
+ * xmlRelaxNGFreeInnerSchema:
+ * @schema:  a schema structure
+ *
+ * Deallocate a RelaxNG schema structure.
+ */
+static void
+xmlRelaxNGFreeInnerSchema(xmlRelaxNGPtr schema)
+{
+    if (schema == NULL)
+        return;
+
+    if (schema->doc != NULL)
+        xmlFreeDoc(schema->doc);
+    if (schema->defTab != NULL) {
+        int i;
+
+        for (i = 0; i < schema->defNr; i++)
+            xmlRelaxNGFreeDefine(schema->defTab[i]);
+        xmlFree(schema->defTab);
+    }
+
+    xmlFree(schema);
+}
+
+/**
+ * xmlRelaxNGFree:
+ * @schema:  a schema structure
+ *
+ * Deallocate a RelaxNG structure.
+ */
+void
+xmlRelaxNGFree(xmlRelaxNGPtr schema)
+{
+    if (schema == NULL)
+        return;
+
+    if (schema->topgrammar != NULL)
+        xmlRelaxNGFreeGrammar(schema->topgrammar);
+    if (schema->doc != NULL)
+        xmlFreeDoc(schema->doc);
+    if (schema->documents != NULL)
+        xmlRelaxNGFreeDocumentList(schema->documents);
+    if (schema->includes != NULL)
+        xmlRelaxNGFreeIncludeList(schema->includes);
+    if (schema->defTab != NULL) {
+        int i;
+
+        for (i = 0; i < schema->defNr; i++)
+            xmlRelaxNGFreeDefine(schema->defTab[i]);
+        xmlFree(schema->defTab);
+    }
+
+    xmlFree(schema);
+}
+
+/**
+ * xmlRelaxNGNewGrammar:
+ * @ctxt:  a Relax-NG validation context (optional)
+ *
+ * Allocate a new RelaxNG grammar.
+ *
+ * Returns the newly allocated structure or NULL in case or error
+ */
+static xmlRelaxNGGrammarPtr
+xmlRelaxNGNewGrammar(xmlRelaxNGParserCtxtPtr ctxt)
+{
+    xmlRelaxNGGrammarPtr ret;
+
+    ret = (xmlRelaxNGGrammarPtr) xmlMalloc(sizeof(xmlRelaxNGGrammar));
+    if (ret == NULL) {
+        xmlRngPErrMemory(ctxt, NULL);
+        return (NULL);
+    }
+    memset(ret, 0, sizeof(xmlRelaxNGGrammar));
+
+    return (ret);
+}
+
+/**
+ * xmlRelaxNGFreeGrammar:
+ * @grammar:  a grammar structure
+ *
+ * Deallocate a RelaxNG grammar structure.
+ */
+static void
+xmlRelaxNGFreeGrammar(xmlRelaxNGGrammarPtr grammar)
+{
+    if (grammar == NULL)
+        return;
+
+    if (grammar->children != NULL) {
+        xmlRelaxNGFreeGrammar(grammar->children);
+    }
+    if (grammar->next != NULL) {
+        xmlRelaxNGFreeGrammar(grammar->next);
+    }
+    if (grammar->refs != NULL) {
+        xmlHashFree(grammar->refs, NULL);
+    }
+    if (grammar->defs != NULL) {
+        xmlHashFree(grammar->defs, NULL);
+    }
+
+    xmlFree(grammar);
+}
+
+/**
+ * xmlRelaxNGNewDefine:
+ * @ctxt:  a Relax-NG validation context
+ * @node:  the node in the input document.
+ *
+ * Allocate a new RelaxNG define.
+ *
+ * Returns the newly allocated structure or NULL in case or error
+ */
+static xmlRelaxNGDefinePtr
+xmlRelaxNGNewDefine(xmlRelaxNGParserCtxtPtr ctxt, xmlNodePtr node)
+{
+    xmlRelaxNGDefinePtr ret;
+
+    if (ctxt->defMax == 0) {
+        ctxt->defMax = 16;
+        ctxt->defNr = 0;
+        ctxt->defTab = (xmlRelaxNGDefinePtr *)
+            xmlMalloc(ctxt->defMax * sizeof(xmlRelaxNGDefinePtr));
+        if (ctxt->defTab == NULL) {
+            xmlRngPErrMemory(ctxt, "allocating define\n");
+            return (NULL);
+        }
+    } else if (ctxt->defMax <= ctxt->defNr) {
+        xmlRelaxNGDefinePtr *tmp;
+
+        ctxt->defMax *= 2;
+        tmp = (xmlRelaxNGDefinePtr *) xmlRealloc(ctxt->defTab,
+                                                 ctxt->defMax *
+                                                 sizeof
+                                                 (xmlRelaxNGDefinePtr));
+        if (tmp == NULL) {
+            xmlRngPErrMemory(ctxt, "allocating define\n");
+            return (NULL);
+        }
+        ctxt->defTab = tmp;
+    }
+    ret = (xmlRelaxNGDefinePtr) xmlMalloc(sizeof(xmlRelaxNGDefine));
+    if (ret == NULL) {
+        xmlRngPErrMemory(ctxt, "allocating define\n");
+        return (NULL);
+    }
+    memset(ret, 0, sizeof(xmlRelaxNGDefine));
+    ctxt->defTab[ctxt->defNr++] = ret;
+    ret->node = node;
+    ret->depth = -1;
+    return (ret);
+}
+
+/**
+ * xmlRelaxNGFreePartition:
+ * @partitions:  a partition set structure
+ *
+ * Deallocate RelaxNG partition set structures.
+ */
+static void
+xmlRelaxNGFreePartition(xmlRelaxNGPartitionPtr partitions)
+{
+    xmlRelaxNGInterleaveGroupPtr group;
+    int j;
+
+    if (partitions != NULL) {
+        if (partitions->groups != NULL) {
+            for (j = 0; j < partitions->nbgroups; j++) {
+                group = partitions->groups[j];
+                if (group != NULL) {
+                    if (group->defs != NULL)
+                        xmlFree(group->defs);
+                    if (group->attrs != NULL)
+                        xmlFree(group->attrs);
+                    xmlFree(group);
+                }
+            }
+            xmlFree(partitions->groups);
+        }
+        if (partitions->triage != NULL) {
+            xmlHashFree(partitions->triage, NULL);
+        }
+        xmlFree(partitions);
+    }
+}
+
+/**
+ * xmlRelaxNGFreeDefine:
+ * @define:  a define structure
+ *
+ * Deallocate a RelaxNG define structure.
+ */
+static void
+xmlRelaxNGFreeDefine(xmlRelaxNGDefinePtr define)
+{
+    if (define == NULL)
+        return;
+
+    if ((define->type == XML_RELAXNG_VALUE) && (define->attrs != NULL)) {
+        xmlRelaxNGTypeLibraryPtr lib;
+
+        lib = (xmlRelaxNGTypeLibraryPtr) define->data;
+        if ((lib != NULL) && (lib->freef != NULL))
+            lib->freef(lib->data, (void *) define->attrs);
+    }
+    if ((define->data != NULL) && (define->type == XML_RELAXNG_INTERLEAVE))
+        xmlRelaxNGFreePartition((xmlRelaxNGPartitionPtr) define->data);
+    if ((define->data != NULL) && (define->type == XML_RELAXNG_CHOICE))
+        xmlHashFree((xmlHashTablePtr) define->data, NULL);
+    if (define->name != NULL)
+        xmlFree(define->name);
+    if (define->ns != NULL)
+        xmlFree(define->ns);
+    if (define->value != NULL)
+        xmlFree(define->value);
+    if (define->contModel != NULL)
+        xmlRegFreeRegexp(define->contModel);
+    xmlFree(define);
+}
+
+/**
+ * xmlRelaxNGNewStates:
+ * @ctxt:  a Relax-NG validation context
+ * @size:  the default size for the container
+ *
+ * Allocate a new RelaxNG validation state container
+ *
+ * Returns the newly allocated structure or NULL in case or error
+ */
+static xmlRelaxNGStatesPtr
+xmlRelaxNGNewStates(xmlRelaxNGValidCtxtPtr ctxt, int size)
+{
+    xmlRelaxNGStatesPtr ret;
+
+    if ((ctxt != NULL) &&
+        (ctxt->freeStates != NULL) && (ctxt->freeStatesNr > 0)) {
+        ctxt->freeStatesNr--;
+        ret = ctxt->freeStates[ctxt->freeStatesNr];
+        ret->nbState = 0;
+        return (ret);
+    }
+    if (size < 16)
+        size = 16;
+
+    ret = (xmlRelaxNGStatesPtr) xmlMalloc(sizeof(xmlRelaxNGStates) +
+                                          (size -
+                                           1) *
+                                          sizeof(xmlRelaxNGValidStatePtr));
+    if (ret == NULL) {
+        xmlRngVErrMemory(ctxt, "allocating states\n");
+        return (NULL);
+    }
+    ret->nbState = 0;
+    ret->maxState = size;
+    ret->tabState = (xmlRelaxNGValidStatePtr *) xmlMalloc((size) *
+                                                          sizeof
+                                                          (xmlRelaxNGValidStatePtr));
+    if (ret->tabState == NULL) {
+        xmlRngVErrMemory(ctxt, "allocating states\n");
+        xmlFree(ret);
+        return (NULL);
+    }
+    return (ret);
+}
+
+/**
+ * xmlRelaxNGAddStateUniq:
+ * @ctxt:  a Relax-NG validation context
+ * @states:  the states container
+ * @state:  the validation state
+ *
+ * Add a RelaxNG validation state to the container without checking
+ * for unicity.
+ *
+ * Return 1 in case of success and 0 if this is a duplicate and -1 on error
+ */
+static int
+xmlRelaxNGAddStatesUniq(xmlRelaxNGValidCtxtPtr ctxt,
+                        xmlRelaxNGStatesPtr states,
+                        xmlRelaxNGValidStatePtr state)
+{
+    if (state == NULL) {
+        return (-1);
+    }
+    if (states->nbState >= states->maxState) {
+        xmlRelaxNGValidStatePtr *tmp;
+        int size;
+
+        size = states->maxState * 2;
+        tmp = (xmlRelaxNGValidStatePtr *) xmlRealloc(states->tabState,
+                                                     (size) *
+                                                     sizeof
+                                                     (xmlRelaxNGValidStatePtr));
+        if (tmp == NULL) {
+            xmlRngVErrMemory(ctxt, "adding states\n");
+            return (-1);
+        }
+        states->tabState = tmp;
+        states->maxState = size;
+    }
+    states->tabState[states->nbState++] = state;
+    return (1);
+}
+
+/**
+ * xmlRelaxNGAddState:
+ * @ctxt:  a Relax-NG validation context
+ * @states:  the states container
+ * @state:  the validation state
+ *
+ * Add a RelaxNG validation state to the container
+ *
+ * Return 1 in case of success and 0 if this is a duplicate and -1 on error
+ */
+static int
+xmlRelaxNGAddStates(xmlRelaxNGValidCtxtPtr ctxt,
+                    xmlRelaxNGStatesPtr states,
+                    xmlRelaxNGValidStatePtr state)
+{
+    int i;
+
+    if (state == NULL || states == NULL) {
+        return (-1);
+    }
+    if (states->nbState >= states->maxState) {
+        xmlRelaxNGValidStatePtr *tmp;
+        int size;
+
+        size = states->maxState * 2;
+        tmp = (xmlRelaxNGValidStatePtr *) xmlRealloc(states->tabState,
+                                                     (size) *
+                                                     sizeof
+                                                     (xmlRelaxNGValidStatePtr));
+        if (tmp == NULL) {
+            xmlRngVErrMemory(ctxt, "adding states\n");
+            return (-1);
+        }
+        states->tabState = tmp;
+        states->maxState = size;
+    }
+    for (i = 0; i < states->nbState; i++) {
+        if (xmlRelaxNGEqualValidState(ctxt, state, states->tabState[i])) {
+            xmlRelaxNGFreeValidState(ctxt, state);
+            return (0);
+        }
+    }
+    states->tabState[states->nbState++] = state;
+    return (1);
+}
+
+/**
+ * xmlRelaxNGFreeStates:
+ * @ctxt:  a Relax-NG validation context
+ * @states:  teh container
+ *
+ * Free a RelaxNG validation state container
+ */
+static void
+xmlRelaxNGFreeStates(xmlRelaxNGValidCtxtPtr ctxt,
+                     xmlRelaxNGStatesPtr states)
+{
+    if (states == NULL)
+        return;
+    if ((ctxt != NULL) && (ctxt->freeStates == NULL)) {
+        ctxt->freeStatesMax = 40;
+        ctxt->freeStatesNr = 0;
+        ctxt->freeStates = (xmlRelaxNGStatesPtr *)
+            xmlMalloc(ctxt->freeStatesMax * sizeof(xmlRelaxNGStatesPtr));
+        if (ctxt->freeStates == NULL) {
+            xmlRngVErrMemory(ctxt, "storing states\n");
+        }
+    } else if ((ctxt != NULL)
+               && (ctxt->freeStatesNr >= ctxt->freeStatesMax)) {
+        xmlRelaxNGStatesPtr *tmp;
+
+        tmp = (xmlRelaxNGStatesPtr *) xmlRealloc(ctxt->freeStates,
+                                                 2 * ctxt->freeStatesMax *
+                                                 sizeof
+                                                 (xmlRelaxNGStatesPtr));
+        if (tmp == NULL) {
+            xmlRngVErrMemory(ctxt, "storing states\n");
+            xmlFree(states->tabState);
+            xmlFree(states);
+            return;
+        }
+        ctxt->freeStates = tmp;
+        ctxt->freeStatesMax *= 2;
+    }
+    if ((ctxt == NULL) || (ctxt->freeStates == NULL)) {
+        xmlFree(states->tabState);
+        xmlFree(states);
+    } else {
+        ctxt->freeStates[ctxt->freeStatesNr++] = states;
+    }
+}
+
+/**
+ * xmlRelaxNGNewValidState:
+ * @ctxt:  a Relax-NG validation context
+ * @node:  the current node or NULL for the document
+ *
+ * Allocate a new RelaxNG validation state
+ *
+ * Returns the newly allocated structure or NULL in case or error
+ */
+static xmlRelaxNGValidStatePtr
+xmlRelaxNGNewValidState(xmlRelaxNGValidCtxtPtr ctxt, xmlNodePtr node)
+{
+    xmlRelaxNGValidStatePtr ret;
+    xmlAttrPtr attr;
+    xmlAttrPtr attrs[MAX_ATTR];
+    int nbAttrs = 0;
+    xmlNodePtr root = NULL;
+
+    if (node == NULL) {
+        root = xmlDocGetRootElement(ctxt->doc);
+        if (root == NULL)
+            return (NULL);
+    } else {
+        attr = node->properties;
+        while (attr != NULL) {
+            if (nbAttrs < MAX_ATTR)
+                attrs[nbAttrs++] = attr;
+            else
+                nbAttrs++;
+            attr = attr->next;
+        }
+    }
+    if ((ctxt->freeState != NULL) && (ctxt->freeState->nbState > 0)) {
+        ctxt->freeState->nbState--;
+        ret = ctxt->freeState->tabState[ctxt->freeState->nbState];
+    } else {
+        ret =
+            (xmlRelaxNGValidStatePtr)
+            xmlMalloc(sizeof(xmlRelaxNGValidState));
+        if (ret == NULL) {
+            xmlRngVErrMemory(ctxt, "allocating states\n");
+            return (NULL);
+        }
+        memset(ret, 0, sizeof(xmlRelaxNGValidState));
+    }
+    ret->value = NULL;
+    ret->endvalue = NULL;
+    if (node == NULL) {
+        ret->node = (xmlNodePtr) ctxt->doc;
+        ret->seq = root;
+    } else {
+        ret->node = node;
+        ret->seq = node->children;
+    }
+    ret->nbAttrs = 0;
+    if (nbAttrs > 0) {
+        if (ret->attrs == NULL) {
+            if (nbAttrs < 4)
+                ret->maxAttrs = 4;
+            else
+                ret->maxAttrs = nbAttrs;
+            ret->attrs = (xmlAttrPtr *) xmlMalloc(ret->maxAttrs *
+                                                  sizeof(xmlAttrPtr));
+            if (ret->attrs == NULL) {
+                xmlRngVErrMemory(ctxt, "allocating states\n");
+                return (ret);
+            }
+        } else if (ret->maxAttrs < nbAttrs) {
+            xmlAttrPtr *tmp;
+
+            tmp = (xmlAttrPtr *) xmlRealloc(ret->attrs, nbAttrs *
+                                            sizeof(xmlAttrPtr));
+            if (tmp == NULL) {
+                xmlRngVErrMemory(ctxt, "allocating states\n");
+                return (ret);
+            }
+            ret->attrs = tmp;
+            ret->maxAttrs = nbAttrs;
+        }
+        ret->nbAttrs = nbAttrs;
+        if (nbAttrs < MAX_ATTR) {
+            memcpy(ret->attrs, attrs, sizeof(xmlAttrPtr) * nbAttrs);
+        } else {
+            attr = node->properties;
+            nbAttrs = 0;
+            while (attr != NULL) {
+                ret->attrs[nbAttrs++] = attr;
+                attr = attr->next;
+            }
+        }
+    }
+    ret->nbAttrLeft = ret->nbAttrs;
+    return (ret);
+}
+
+/**
+ * xmlRelaxNGCopyValidState:
+ * @ctxt:  a Relax-NG validation context
+ * @state:  a validation state
+ *
+ * Copy the validation state
+ *
+ * Returns the newly allocated structure or NULL in case or error
+ */
+static xmlRelaxNGValidStatePtr
+xmlRelaxNGCopyValidState(xmlRelaxNGValidCtxtPtr ctxt,
+                         xmlRelaxNGValidStatePtr state)
+{
+    xmlRelaxNGValidStatePtr ret;
+    unsigned int maxAttrs;
+    xmlAttrPtr *attrs;
+
+    if (state == NULL)
+        return (NULL);
+    if ((ctxt->freeState != NULL) && (ctxt->freeState->nbState > 0)) {
+        ctxt->freeState->nbState--;
+        ret = ctxt->freeState->tabState[ctxt->freeState->nbState];
+    } else {
+        ret =
+            (xmlRelaxNGValidStatePtr)
+            xmlMalloc(sizeof(xmlRelaxNGValidState));
+        if (ret == NULL) {
+            xmlRngVErrMemory(ctxt, "allocating states\n");
+            return (NULL);
+        }
+        memset(ret, 0, sizeof(xmlRelaxNGValidState));
+    }
+    attrs = ret->attrs;
+    maxAttrs = ret->maxAttrs;
+    memcpy(ret, state, sizeof(xmlRelaxNGValidState));
+    ret->attrs = attrs;
+    ret->maxAttrs = maxAttrs;
+    if (state->nbAttrs > 0) {
+        if (ret->attrs == NULL) {
+            ret->maxAttrs = state->maxAttrs;
+            ret->attrs = (xmlAttrPtr *) xmlMalloc(ret->maxAttrs *
+                                                  sizeof(xmlAttrPtr));
+            if (ret->attrs == NULL) {
+                xmlRngVErrMemory(ctxt, "allocating states\n");
+                ret->nbAttrs = 0;
+                return (ret);
+            }
+        } else if (ret->maxAttrs < state->nbAttrs) {
+            xmlAttrPtr *tmp;
+
+            tmp = (xmlAttrPtr *) xmlRealloc(ret->attrs, state->maxAttrs *
+                                            sizeof(xmlAttrPtr));
+            if (tmp == NULL) {
+                xmlRngVErrMemory(ctxt, "allocating states\n");
+                ret->nbAttrs = 0;
+                return (ret);
+            }
+            ret->maxAttrs = state->maxAttrs;
+            ret->attrs = tmp;
+        }
+        memcpy(ret->attrs, state->attrs,
+               state->nbAttrs * sizeof(xmlAttrPtr));
+    }
+    return (ret);
+}
+
+/**
+ * xmlRelaxNGEqualValidState:
+ * @ctxt:  a Relax-NG validation context
+ * @state1:  a validation state
+ * @state2:  a validation state
+ *
+ * Compare the validation states for equality
+ *
+ * Returns 1 if equald, 0 otherwise
+ */
+static int
+xmlRelaxNGEqualValidState(xmlRelaxNGValidCtxtPtr ctxt ATTRIBUTE_UNUSED,
+                          xmlRelaxNGValidStatePtr state1,
+                          xmlRelaxNGValidStatePtr state2)
+{
+    int i;
+
+    if ((state1 == NULL) || (state2 == NULL))
+        return (0);
+    if (state1 == state2)
+        return (1);
+    if (state1->node != state2->node)
+        return (0);
+    if (state1->seq != state2->seq)
+        return (0);
+    if (state1->nbAttrLeft != state2->nbAttrLeft)
+        return (0);
+    if (state1->nbAttrs != state2->nbAttrs)
+        return (0);
+    if (state1->endvalue != state2->endvalue)
+        return (0);
+    if ((state1->value != state2->value) &&
+        (!xmlStrEqual(state1->value, state2->value)))
+        return (0);
+    for (i = 0; i < state1->nbAttrs; i++) {
+        if (state1->attrs[i] != state2->attrs[i])
+            return (0);
+    }
+    return (1);
+}
+
+/**
+ * xmlRelaxNGFreeValidState:
+ * @state:  a validation state structure
+ *
+ * Deallocate a RelaxNG validation state structure.
+ */
+static void
+xmlRelaxNGFreeValidState(xmlRelaxNGValidCtxtPtr ctxt,
+                         xmlRelaxNGValidStatePtr state)
+{
+    if (state == NULL)
+        return;
+
+    if ((ctxt != NULL) && (ctxt->freeState == NULL)) {
+        ctxt->freeState = xmlRelaxNGNewStates(ctxt, 40);
+    }
+    if ((ctxt == NULL) || (ctxt->freeState == NULL)) {
+        if (state->attrs != NULL)
+            xmlFree(state->attrs);
+        xmlFree(state);
+    } else {
+        xmlRelaxNGAddStatesUniq(ctxt, ctxt->freeState, state);
+    }
+}
+
+/************************************************************************
+ *									*
+ *			Semi internal functions				*
+ *									*
+ ************************************************************************/
+
+/**
+ * xmlRelaxParserSetFlag:
+ * @ctxt: a RelaxNG parser context
+ * @flags: a set of flags values
+ *
+ * Semi private function used to pass informations to a parser context
+ * which are a combination of xmlRelaxNGParserFlag .
+ *
+ * Returns 0 if success and -1 in case of error
+ */
+int
+xmlRelaxParserSetFlag(xmlRelaxNGParserCtxtPtr ctxt, int flags)
+{
+    if (ctxt == NULL) return(-1);
+    if (flags & XML_RELAXNGP_FREE_DOC) {
+        ctxt->crng |= XML_RELAXNGP_FREE_DOC;
+	flags -= XML_RELAXNGP_FREE_DOC;
+    }
+    if (flags & XML_RELAXNGP_CRNG) {
+        ctxt->crng |= XML_RELAXNGP_CRNG;
+	flags -= XML_RELAXNGP_CRNG;
+    }
+    if (flags != 0) return(-1);
+    return(0);
+}
+
+/************************************************************************
+ *									*
+ *			Document functions				*
+ *									*
+ ************************************************************************/
+static xmlDocPtr xmlRelaxNGCleanupDoc(xmlRelaxNGParserCtxtPtr ctxt,
+                                      xmlDocPtr doc);
+
+/**
+ * xmlRelaxNGIncludePush:
+ * @ctxt:  the parser context
+ * @value:  the element doc
+ *
+ * Pushes a new include on top of the include stack
+ *
+ * Returns 0 in case of error, the index in the stack otherwise
+ */
+static int
+xmlRelaxNGIncludePush(xmlRelaxNGParserCtxtPtr ctxt,
+                      xmlRelaxNGIncludePtr value)
+{
+    if (ctxt->incTab == NULL) {
+        ctxt->incMax = 4;
+        ctxt->incNr = 0;
+        ctxt->incTab =
+            (xmlRelaxNGIncludePtr *) xmlMalloc(ctxt->incMax *
+                                               sizeof(ctxt->incTab[0]));
+        if (ctxt->incTab == NULL) {
+            xmlRngPErrMemory(ctxt, "allocating include\n");
+            return (0);
+        }
+    }
+    if (ctxt->incNr >= ctxt->incMax) {
+        ctxt->incMax *= 2;
+        ctxt->incTab =
+            (xmlRelaxNGIncludePtr *) xmlRealloc(ctxt->incTab,
+                                                ctxt->incMax *
+                                                sizeof(ctxt->incTab[0]));
+        if (ctxt->incTab == NULL) {
+            xmlRngPErrMemory(ctxt, "allocating include\n");
+            return (0);
+        }
+    }
+    ctxt->incTab[ctxt->incNr] = value;
+    ctxt->inc = value;
+    return (ctxt->incNr++);
+}
+
+/**
+ * xmlRelaxNGIncludePop:
+ * @ctxt: the parser context
+ *
+ * Pops the top include from the include stack
+ *
+ * Returns the include just removed
+ */
+static xmlRelaxNGIncludePtr
+xmlRelaxNGIncludePop(xmlRelaxNGParserCtxtPtr ctxt)
+{
+    xmlRelaxNGIncludePtr ret;
+
+    if (ctxt->incNr <= 0)
+        return (NULL);
+    ctxt->incNr--;
+    if (ctxt->incNr > 0)
+        ctxt->inc = ctxt->incTab[ctxt->incNr - 1];
+    else
+        ctxt->inc = NULL;
+    ret = ctxt->incTab[ctxt->incNr];
+    ctxt->incTab[ctxt->incNr] = NULL;
+    return (ret);
+}
+
+/**
+ * xmlRelaxNGRemoveRedefine:
+ * @ctxt: the parser context
+ * @URL:  the normalized URL
+ * @target:  the included target
+ * @name:  the define name to eliminate
+ *
+ * Applies the elimination algorithm of 4.7
+ *
+ * Returns 0 in case of error, 1 in case of success.
+ */
+static int
+xmlRelaxNGRemoveRedefine(xmlRelaxNGParserCtxtPtr ctxt,
+                         const xmlChar * URL ATTRIBUTE_UNUSED,
+                         xmlNodePtr target, const xmlChar * name)
+{
+    int found = 0;
+    xmlNodePtr tmp, tmp2;
+    xmlChar *name2;
+
+#ifdef DEBUG_INCLUDE
+    if (name == NULL)
+        xmlGenericError(xmlGenericErrorContext,
+                        "Elimination of <include> start from %s\n", URL);
+    else
+        xmlGenericError(xmlGenericErrorContext,
+                        "Elimination of <include> define %s from %s\n",
+                        name, URL);
+#endif
+    tmp = target;
+    while (tmp != NULL) {
+        tmp2 = tmp->next;
+        if ((name == NULL) && (IS_RELAXNG(tmp, "start"))) {
+            found = 1;
+            xmlUnlinkNode(tmp);
+            xmlFreeNode(tmp);
+        } else if ((name != NULL) && (IS_RELAXNG(tmp, "define"))) {
+            name2 = xmlGetProp(tmp, BAD_CAST "name");
+            xmlRelaxNGNormExtSpace(name2);
+            if (name2 != NULL) {
+                if (xmlStrEqual(name, name2)) {
+                    found = 1;
+                    xmlUnlinkNode(tmp);
+                    xmlFreeNode(tmp);
+                }
+                xmlFree(name2);
+            }
+        } else if (IS_RELAXNG(tmp, "include")) {
+            xmlChar *href = NULL;
+            xmlRelaxNGDocumentPtr inc = tmp->psvi;
+
+            if ((inc != NULL) && (inc->doc != NULL) &&
+                (inc->doc->children != NULL)) {
+
+                if (xmlStrEqual
+                    (inc->doc->children->name, BAD_CAST "grammar")) {
+#ifdef DEBUG_INCLUDE
+                    href = xmlGetProp(tmp, BAD_CAST "href");
+#endif
+                    if (xmlRelaxNGRemoveRedefine(ctxt, href,
+                                                 xmlDocGetRootElement(inc->doc)->children,
+                                                 name) == 1) {
+                        found = 1;
+                    }
+#ifdef DEBUG_INCLUDE
+                    if (href != NULL)
+                        xmlFree(href);
+#endif
+                }
+            }
+        }
+        tmp = tmp2;
+    }
+    return (found);
+}
+
+/**
+ * xmlRelaxNGLoadInclude:
+ * @ctxt: the parser context
+ * @URL:  the normalized URL
+ * @node: the include node.
+ * @ns:  the namespace passed from the context.
+ *
+ * First lookup if the document is already loaded into the parser context,
+ * check against recursion. If not found the resource is loaded and
+ * the content is preprocessed before being returned back to the caller.
+ *
+ * Returns the xmlRelaxNGIncludePtr or NULL in case of error
+ */
+static xmlRelaxNGIncludePtr
+xmlRelaxNGLoadInclude(xmlRelaxNGParserCtxtPtr ctxt, const xmlChar * URL,
+                      xmlNodePtr node, const xmlChar * ns)
+{
+    xmlRelaxNGIncludePtr ret = NULL;
+    xmlDocPtr doc;
+    int i;
+    xmlNodePtr root, cur;
+
+#ifdef DEBUG_INCLUDE
+    xmlGenericError(xmlGenericErrorContext,
+                    "xmlRelaxNGLoadInclude(%s)\n", URL);
+#endif
+
+    /*
+     * check against recursion in the stack
+     */
+    for (i = 0; i < ctxt->incNr; i++) {
+        if (xmlStrEqual(ctxt->incTab[i]->href, URL)) {
+            xmlRngPErr(ctxt, NULL, XML_RNGP_INCLUDE_RECURSE,
+                       "Detected an Include recursion for %s\n", URL,
+                       NULL);
+            return (NULL);
+        }
+    }
+
+    /*
+     * load the document
+     */
+    doc = xmlReadFile((const char *) URL,NULL,0);
+    if (doc == NULL) {
+        xmlRngPErr(ctxt, node, XML_RNGP_PARSE_ERROR,
+                   "xmlRelaxNG: could not load %s\n", URL, NULL);
+        return (NULL);
+    }
+#ifdef DEBUG_INCLUDE
+    xmlGenericError(xmlGenericErrorContext, "Parsed %s Okay\n", URL);
+#endif
+
+    /*
+     * Allocate the document structures and register it first.
+     */
+    ret = (xmlRelaxNGIncludePtr) xmlMalloc(sizeof(xmlRelaxNGInclude));
+    if (ret == NULL) {
+        xmlRngPErrMemory(ctxt, "allocating include\n");
+        xmlFreeDoc(doc);
+        return (NULL);
+    }
+    memset(ret, 0, sizeof(xmlRelaxNGInclude));
+    ret->doc = doc;
+    ret->href = xmlStrdup(URL);
+    ret->next = ctxt->includes;
+    ctxt->includes = ret;
+
+    /*
+     * transmit the ns if needed
+     */
+    if (ns != NULL) {
+        root = xmlDocGetRootElement(doc);
+        if (root != NULL) {
+            if (xmlHasProp(root, BAD_CAST "ns") == NULL) {
+                xmlSetProp(root, BAD_CAST "ns", ns);
+            }
+        }
+    }
+
+    /*
+     * push it on the stack
+     */
+    xmlRelaxNGIncludePush(ctxt, ret);
+
+    /*
+     * Some preprocessing of the document content, this include recursing
+     * in the include stack.
+     */
+#ifdef DEBUG_INCLUDE
+    xmlGenericError(xmlGenericErrorContext, "cleanup of %s\n", URL);
+#endif
+
+    doc = xmlRelaxNGCleanupDoc(ctxt, doc);
+    if (doc == NULL) {
+        ctxt->inc = NULL;
+        return (NULL);
+    }
+
+    /*
+     * Pop up the include from the stack
+     */
+    xmlRelaxNGIncludePop(ctxt);
+
+#ifdef DEBUG_INCLUDE
+    xmlGenericError(xmlGenericErrorContext, "Checking of %s\n", URL);
+#endif
+    /*
+     * Check that the top element is a grammar
+     */
+    root = xmlDocGetRootElement(doc);
+    if (root == NULL) {
+        xmlRngPErr(ctxt, node, XML_RNGP_EMPTY,
+                   "xmlRelaxNG: included document is empty %s\n", URL,
+                   NULL);
+        return (NULL);
+    }
+    if (!IS_RELAXNG(root, "grammar")) {
+        xmlRngPErr(ctxt, node, XML_RNGP_GRAMMAR_MISSING,
+                   "xmlRelaxNG: included document %s root is not a grammar\n",
+                   URL, NULL);
+        return (NULL);
+    }
+
+    /*
+     * Elimination of redefined rules in the include.
+     */
+    cur = node->children;
+    while (cur != NULL) {
+        if (IS_RELAXNG(cur, "start")) {
+            int found = 0;
+
+            found =
+                xmlRelaxNGRemoveRedefine(ctxt, URL, root->children, NULL);
+            if (!found) {
+                xmlRngPErr(ctxt, node, XML_RNGP_START_MISSING,
+                           "xmlRelaxNG: include %s has a start but not the included grammar\n",
+                           URL, NULL);
+            }
+        } else if (IS_RELAXNG(cur, "define")) {
+            xmlChar *name;
+
+            name = xmlGetProp(cur, BAD_CAST "name");
+            if (name == NULL) {
+                xmlRngPErr(ctxt, node, XML_RNGP_NAME_MISSING,
+                           "xmlRelaxNG: include %s has define without name\n",
+                           URL, NULL);
+            } else {
+                int found;
+
+                xmlRelaxNGNormExtSpace(name);
+                found = xmlRelaxNGRemoveRedefine(ctxt, URL,
+                                                 root->children, name);
+                if (!found) {
+                    xmlRngPErr(ctxt, node, XML_RNGP_DEFINE_MISSING,
+                               "xmlRelaxNG: include %s has a define %s but not the included grammar\n",
+                               URL, name);
+                }
+                xmlFree(name);
+            }
+        }
+        cur = cur->next;
+    }
+
+
+    return (ret);
+}
+
+/**
+ * xmlRelaxNGValidErrorPush:
+ * @ctxt:  the validation context
+ * @err:  the error code
+ * @arg1:  the first string argument
+ * @arg2:  the second string argument
+ * @dup:  arg need to be duplicated
+ *
+ * Pushes a new error on top of the error stack
+ *
+ * Returns 0 in case of error, the index in the stack otherwise
+ */
+static int
+xmlRelaxNGValidErrorPush(xmlRelaxNGValidCtxtPtr ctxt,
+                         xmlRelaxNGValidErr err, const xmlChar * arg1,
+                         const xmlChar * arg2, int dup)
+{
+    xmlRelaxNGValidErrorPtr cur;
+
+#ifdef DEBUG_ERROR
+    xmlGenericError(xmlGenericErrorContext,
+                    "Pushing error %d at %d on stack\n", err, ctxt->errNr);
+#endif
+    if (ctxt->errTab == NULL) {
+        ctxt->errMax = 8;
+        ctxt->errNr = 0;
+        ctxt->errTab =
+            (xmlRelaxNGValidErrorPtr) xmlMalloc(ctxt->errMax *
+                                                sizeof
+                                                (xmlRelaxNGValidError));
+        if (ctxt->errTab == NULL) {
+            xmlRngVErrMemory(ctxt, "pushing error\n");
+            return (0);
+        }
+        ctxt->err = NULL;
+    }
+    if (ctxt->errNr >= ctxt->errMax) {
+        ctxt->errMax *= 2;
+        ctxt->errTab =
+            (xmlRelaxNGValidErrorPtr) xmlRealloc(ctxt->errTab,
+                                                 ctxt->errMax *
+                                                 sizeof
+                                                 (xmlRelaxNGValidError));
+        if (ctxt->errTab == NULL) {
+            xmlRngVErrMemory(ctxt, "pushing error\n");
+            return (0);
+        }
+        ctxt->err = &ctxt->errTab[ctxt->errNr - 1];
+    }
+    if ((ctxt->err != NULL) && (ctxt->state != NULL) &&
+        (ctxt->err->node == ctxt->state->node) && (ctxt->err->err == err))
+        return (ctxt->errNr);
+    cur = &ctxt->errTab[ctxt->errNr];
+    cur->err = err;
+    if (dup) {
+        cur->arg1 = xmlStrdup(arg1);
+        cur->arg2 = xmlStrdup(arg2);
+        cur->flags = ERROR_IS_DUP;
+    } else {
+        cur->arg1 = arg1;
+        cur->arg2 = arg2;
+        cur->flags = 0;
+    }
+    if (ctxt->state != NULL) {
+        cur->node = ctxt->state->node;
+        cur->seq = ctxt->state->seq;
+    } else {
+        cur->node = NULL;
+        cur->seq = NULL;
+    }
+    ctxt->err = cur;
+    return (ctxt->errNr++);
+}
+
+/**
+ * xmlRelaxNGValidErrorPop:
+ * @ctxt: the validation context
+ *
+ * Pops the top error from the error stack
+ */
+static void
+xmlRelaxNGValidErrorPop(xmlRelaxNGValidCtxtPtr ctxt)
+{
+    xmlRelaxNGValidErrorPtr cur;
+
+    if (ctxt->errNr <= 0) {
+        ctxt->err = NULL;
+        return;
+    }
+    ctxt->errNr--;
+    if (ctxt->errNr > 0)
+        ctxt->err = &ctxt->errTab[ctxt->errNr - 1];
+    else
+        ctxt->err = NULL;
+    cur = &ctxt->errTab[ctxt->errNr];
+    if (cur->flags & ERROR_IS_DUP) {
+        if (cur->arg1 != NULL)
+            xmlFree((xmlChar *) cur->arg1);
+        cur->arg1 = NULL;
+        if (cur->arg2 != NULL)
+            xmlFree((xmlChar *) cur->arg2);
+        cur->arg2 = NULL;
+        cur->flags = 0;
+    }
+}
+
+/**
+ * xmlRelaxNGDocumentPush:
+ * @ctxt:  the parser context
+ * @value:  the element doc
+ *
+ * Pushes a new doc on top of the doc stack
+ *
+ * Returns 0 in case of error, the index in the stack otherwise
+ */
+static int
+xmlRelaxNGDocumentPush(xmlRelaxNGParserCtxtPtr ctxt,
+                       xmlRelaxNGDocumentPtr value)
+{
+    if (ctxt->docTab == NULL) {
+        ctxt->docMax = 4;
+        ctxt->docNr = 0;
+        ctxt->docTab =
+            (xmlRelaxNGDocumentPtr *) xmlMalloc(ctxt->docMax *
+                                                sizeof(ctxt->docTab[0]));
+        if (ctxt->docTab == NULL) {
+            xmlRngPErrMemory(ctxt, "adding document\n");
+            return (0);
+        }
+    }
+    if (ctxt->docNr >= ctxt->docMax) {
+        ctxt->docMax *= 2;
+        ctxt->docTab =
+            (xmlRelaxNGDocumentPtr *) xmlRealloc(ctxt->docTab,
+                                                 ctxt->docMax *
+                                                 sizeof(ctxt->docTab[0]));
+        if (ctxt->docTab == NULL) {
+            xmlRngPErrMemory(ctxt, "adding document\n");
+            return (0);
+        }
+    }
+    ctxt->docTab[ctxt->docNr] = value;
+    ctxt->doc = value;
+    return (ctxt->docNr++);
+}
+
+/**
+ * xmlRelaxNGDocumentPop:
+ * @ctxt: the parser context
+ *
+ * Pops the top doc from the doc stack
+ *
+ * Returns the doc just removed
+ */
+static xmlRelaxNGDocumentPtr
+xmlRelaxNGDocumentPop(xmlRelaxNGParserCtxtPtr ctxt)
+{
+    xmlRelaxNGDocumentPtr ret;
+
+    if (ctxt->docNr <= 0)
+        return (NULL);
+    ctxt->docNr--;
+    if (ctxt->docNr > 0)
+        ctxt->doc = ctxt->docTab[ctxt->docNr - 1];
+    else
+        ctxt->doc = NULL;
+    ret = ctxt->docTab[ctxt->docNr];
+    ctxt->docTab[ctxt->docNr] = NULL;
+    return (ret);
+}
+
+/**
+ * xmlRelaxNGLoadExternalRef:
+ * @ctxt: the parser context
+ * @URL:  the normalized URL
+ * @ns:  the inherited ns if any
+ *
+ * First lookup if the document is already loaded into the parser context,
+ * check against recursion. If not found the resource is loaded and
+ * the content is preprocessed before being returned back to the caller.
+ *
+ * Returns the xmlRelaxNGDocumentPtr or NULL in case of error
+ */
+static xmlRelaxNGDocumentPtr
+xmlRelaxNGLoadExternalRef(xmlRelaxNGParserCtxtPtr ctxt,
+                          const xmlChar * URL, const xmlChar * ns)
+{
+    xmlRelaxNGDocumentPtr ret = NULL;
+    xmlDocPtr doc;
+    xmlNodePtr root;
+    int i;
+
+    /*
+     * check against recursion in the stack
+     */
+    for (i = 0; i < ctxt->docNr; i++) {
+        if (xmlStrEqual(ctxt->docTab[i]->href, URL)) {
+            xmlRngPErr(ctxt, NULL, XML_RNGP_EXTERNALREF_RECURSE,
+                       "Detected an externalRef recursion for %s\n", URL,
+                       NULL);
+            return (NULL);
+        }
+    }
+
+    /*
+     * load the document
+     */
+    doc = xmlReadFile((const char *) URL,NULL,0);
+    if (doc == NULL) {
+        xmlRngPErr(ctxt, NULL, XML_RNGP_PARSE_ERROR,
+                   "xmlRelaxNG: could not load %s\n", URL, NULL);
+        return (NULL);
+    }
+
+    /*
+     * Allocate the document structures and register it first.
+     */
+    ret = (xmlRelaxNGDocumentPtr) xmlMalloc(sizeof(xmlRelaxNGDocument));
+    if (ret == NULL) {
+        xmlRngPErr(ctxt, (xmlNodePtr) doc, XML_ERR_NO_MEMORY,
+                   "xmlRelaxNG: allocate memory for doc %s\n", URL, NULL);
+        xmlFreeDoc(doc);
+        return (NULL);
+    }
+    memset(ret, 0, sizeof(xmlRelaxNGDocument));
+    ret->doc = doc;
+    ret->href = xmlStrdup(URL);
+    ret->next = ctxt->documents;
+    ret->externalRef = 1;
+    ctxt->documents = ret;
+
+    /*
+     * transmit the ns if needed
+     */
+    if (ns != NULL) {
+        root = xmlDocGetRootElement(doc);
+        if (root != NULL) {
+            if (xmlHasProp(root, BAD_CAST "ns") == NULL) {
+                xmlSetProp(root, BAD_CAST "ns", ns);
+            }
+        }
+    }
+
+    /*
+     * push it on the stack and register it in the hash table
+     */
+    xmlRelaxNGDocumentPush(ctxt, ret);
+
+    /*
+     * Some preprocessing of the document content
+     */
+    doc = xmlRelaxNGCleanupDoc(ctxt, doc);
+    if (doc == NULL) {
+        ctxt->doc = NULL;
+        return (NULL);
+    }
+
+    xmlRelaxNGDocumentPop(ctxt);
+
+    return (ret);
+}
+
+/************************************************************************
+ *									*
+ *			Error functions					*
+ *									*
+ ************************************************************************/
+
+#define VALID_ERR(a) xmlRelaxNGAddValidError(ctxt, a, NULL, NULL, 0);
+#define VALID_ERR2(a, b) xmlRelaxNGAddValidError(ctxt, a, b, NULL, 0);
+#define VALID_ERR3(a, b, c) xmlRelaxNGAddValidError(ctxt, a, b, c, 0);
+#define VALID_ERR2P(a, b) xmlRelaxNGAddValidError(ctxt, a, b, NULL, 1);
+#define VALID_ERR3P(a, b, c) xmlRelaxNGAddValidError(ctxt, a, b, c, 1);
+
+static const char *
+xmlRelaxNGDefName(xmlRelaxNGDefinePtr def)
+{
+    if (def == NULL)
+        return ("none");
+    switch (def->type) {
+        case XML_RELAXNG_EMPTY:
+            return ("empty");
+        case XML_RELAXNG_NOT_ALLOWED:
+            return ("notAllowed");
+        case XML_RELAXNG_EXCEPT:
+            return ("except");
+        case XML_RELAXNG_TEXT:
+            return ("text");
+        case XML_RELAXNG_ELEMENT:
+            return ("element");
+        case XML_RELAXNG_DATATYPE:
+            return ("datatype");
+        case XML_RELAXNG_VALUE:
+            return ("value");
+        case XML_RELAXNG_LIST:
+            return ("list");
+        case XML_RELAXNG_ATTRIBUTE:
+            return ("attribute");
+        case XML_RELAXNG_DEF:
+            return ("def");
+        case XML_RELAXNG_REF:
+            return ("ref");
+        case XML_RELAXNG_EXTERNALREF:
+            return ("externalRef");
+        case XML_RELAXNG_PARENTREF:
+            return ("parentRef");
+        case XML_RELAXNG_OPTIONAL:
+            return ("optional");
+        case XML_RELAXNG_ZEROORMORE:
+            return ("zeroOrMore");
+        case XML_RELAXNG_ONEORMORE:
+            return ("oneOrMore");
+        case XML_RELAXNG_CHOICE:
+            return ("choice");
+        case XML_RELAXNG_GROUP:
+            return ("group");
+        case XML_RELAXNG_INTERLEAVE:
+            return ("interleave");
+        case XML_RELAXNG_START:
+            return ("start");
+        case XML_RELAXNG_NOOP:
+            return ("noop");
+        case XML_RELAXNG_PARAM:
+            return ("param");
+    }
+    return ("unknown");
+}
+
+/**
+ * xmlRelaxNGGetErrorString:
+ * @err:  the error code
+ * @arg1:  the first string argument
+ * @arg2:  the second string argument
+ *
+ * computes a formatted error string for the given error code and args
+ *
+ * Returns the error string, it must be deallocated by the caller
+ */
+static xmlChar *
+xmlRelaxNGGetErrorString(xmlRelaxNGValidErr err, const xmlChar * arg1,
+                         const xmlChar * arg2)
+{
+    char msg[1000];
+    xmlChar *result;
+
+    if (arg1 == NULL)
+        arg1 = BAD_CAST "";
+    if (arg2 == NULL)
+        arg2 = BAD_CAST "";
+
+    msg[0] = 0;
+    switch (err) {
+        case XML_RELAXNG_OK:
+            return (NULL);
+        case XML_RELAXNG_ERR_MEMORY:
+            return (xmlCharStrdup("out of memory\n"));
+        case XML_RELAXNG_ERR_TYPE:
+            snprintf(msg, 1000, "failed to validate type %s\n", arg1);
+            break;
+        case XML_RELAXNG_ERR_TYPEVAL:
+            snprintf(msg, 1000, "Type %s doesn't allow value '%s'\n", arg1,
+                     arg2);
+            break;
+        case XML_RELAXNG_ERR_DUPID:
+            snprintf(msg, 1000, "ID %s redefined\n", arg1);
+            break;
+        case XML_RELAXNG_ERR_TYPECMP:
+            snprintf(msg, 1000, "failed to compare type %s\n", arg1);
+            break;
+        case XML_RELAXNG_ERR_NOSTATE:
+            return (xmlCharStrdup("Internal error: no state\n"));
+        case XML_RELAXNG_ERR_NODEFINE:
+            return (xmlCharStrdup("Internal error: no define\n"));
+        case XML_RELAXNG_ERR_INTERNAL:
+            snprintf(msg, 1000, "Internal error: %s\n", arg1);
+            break;
+        case XML_RELAXNG_ERR_LISTEXTRA:
+            snprintf(msg, 1000, "Extra data in list: %s\n", arg1);
+            break;
+        case XML_RELAXNG_ERR_INTERNODATA:
+            return (xmlCharStrdup
+                    ("Internal: interleave block has no data\n"));
+        case XML_RELAXNG_ERR_INTERSEQ:
+            return (xmlCharStrdup("Invalid sequence in interleave\n"));
+        case XML_RELAXNG_ERR_INTEREXTRA:
+            snprintf(msg, 1000, "Extra element %s in interleave\n", arg1);
+            break;
+        case XML_RELAXNG_ERR_ELEMNAME:
+            snprintf(msg, 1000, "Expecting element %s, got %s\n", arg1,
+                     arg2);
+            break;
+        case XML_RELAXNG_ERR_ELEMNONS:
+            snprintf(msg, 1000, "Expecting a namespace for element %s\n",
+                     arg1);
+            break;
+        case XML_RELAXNG_ERR_ELEMWRONGNS:
+            snprintf(msg, 1000,
+                     "Element %s has wrong namespace: expecting %s\n", arg1,
+                     arg2);
+            break;
+        case XML_RELAXNG_ERR_ELEMWRONG:
+            snprintf(msg, 1000, "Did not expect element %s there\n", arg1);
+            break;
+        case XML_RELAXNG_ERR_TEXTWRONG:
+            snprintf(msg, 1000,
+                     "Did not expect text in element %s content\n", arg1);
+            break;
+        case XML_RELAXNG_ERR_ELEMEXTRANS:
+            snprintf(msg, 1000, "Expecting no namespace for element %s\n",
+                     arg1);
+            break;
+        case XML_RELAXNG_ERR_ELEMNOTEMPTY:
+            snprintf(msg, 1000, "Expecting element %s to be empty\n", arg1);
+            break;
+        case XML_RELAXNG_ERR_NOELEM:
+            snprintf(msg, 1000, "Expecting an element %s, got nothing\n",
+                     arg1);
+            break;
+        case XML_RELAXNG_ERR_NOTELEM:
+            return (xmlCharStrdup("Expecting an element got text\n"));
+        case XML_RELAXNG_ERR_ATTRVALID:
+            snprintf(msg, 1000, "Element %s failed to validate attributes\n",
+                     arg1);
+            break;
+        case XML_RELAXNG_ERR_CONTENTVALID:
+            snprintf(msg, 1000, "Element %s failed to validate content\n",
+                     arg1);
+            break;
+        case XML_RELAXNG_ERR_EXTRACONTENT:
+            snprintf(msg, 1000, "Element %s has extra content: %s\n",
+                     arg1, arg2);
+            break;
+        case XML_RELAXNG_ERR_INVALIDATTR:
+            snprintf(msg, 1000, "Invalid attribute %s for element %s\n",
+                     arg1, arg2);
+            break;
+        case XML_RELAXNG_ERR_LACKDATA:
+            snprintf(msg, 1000, "Datatype element %s contains no data\n",
+                     arg1);
+            break;
+        case XML_RELAXNG_ERR_DATAELEM:
+            snprintf(msg, 1000, "Datatype element %s has child elements\n",
+                     arg1);
+            break;
+        case XML_RELAXNG_ERR_VALELEM:
+            snprintf(msg, 1000, "Value element %s has child elements\n",
+                     arg1);
+            break;
+        case XML_RELAXNG_ERR_LISTELEM:
+            snprintf(msg, 1000, "List element %s has child elements\n",
+                     arg1);
+            break;
+        case XML_RELAXNG_ERR_DATATYPE:
+            snprintf(msg, 1000, "Error validating datatype %s\n", arg1);
+            break;
+        case XML_RELAXNG_ERR_VALUE:
+            snprintf(msg, 1000, "Error validating value %s\n", arg1);
+            break;
+        case XML_RELAXNG_ERR_LIST:
+            return (xmlCharStrdup("Error validating list\n"));
+        case XML_RELAXNG_ERR_NOGRAMMAR:
+            return (xmlCharStrdup("No top grammar defined\n"));
+        case XML_RELAXNG_ERR_EXTRADATA:
+            return (xmlCharStrdup("Extra data in the document\n"));
+        default:
+            return (xmlCharStrdup("Unknown error !\n"));
+    }
+    if (msg[0] == 0) {
+        snprintf(msg, 1000, "Unknown error code %d\n", err);
+    }
+    msg[1000 - 1] = 0;
+    result = xmlCharStrdup(msg);
+    return (xmlEscapeFormatString(&result));
+}
+
+/**
+ * xmlRelaxNGShowValidError:
+ * @ctxt:  the validation context
+ * @err:  the error number
+ * @node:  the node
+ * @child:  the node child generating the problem.
+ * @arg1:  the first argument
+ * @arg2:  the second argument
+ *
+ * Show a validation error.
+ */
+static void
+xmlRelaxNGShowValidError(xmlRelaxNGValidCtxtPtr ctxt,
+                         xmlRelaxNGValidErr err, xmlNodePtr node,
+                         xmlNodePtr child, const xmlChar * arg1,
+                         const xmlChar * arg2)
+{
+    xmlChar *msg;
+
+    if (ctxt->flags & FLAGS_NOERROR)
+        return;
+
+#ifdef DEBUG_ERROR
+    xmlGenericError(xmlGenericErrorContext, "Show error %d\n", err);
+#endif
+    msg = xmlRelaxNGGetErrorString(err, arg1, arg2);
+    if (msg == NULL)
+        return;
+
+    if (ctxt->errNo == XML_RELAXNG_OK)
+        ctxt->errNo = err;
+    xmlRngVErr(ctxt, (child == NULL ? node : child), err,
+               (const char *) msg, arg1, arg2);
+    xmlFree(msg);
+}
+
+/**
+ * xmlRelaxNGPopErrors:
+ * @ctxt:  the validation context
+ * @level:  the error level in the stack
+ *
+ * pop and discard all errors until the given level is reached
+ */
+static void
+xmlRelaxNGPopErrors(xmlRelaxNGValidCtxtPtr ctxt, int level)
+{
+    int i;
+    xmlRelaxNGValidErrorPtr err;
+
+#ifdef DEBUG_ERROR
+    xmlGenericError(xmlGenericErrorContext,
+                    "Pop errors till level %d\n", level);
+#endif
+    for (i = level; i < ctxt->errNr; i++) {
+        err = &ctxt->errTab[i];
+        if (err->flags & ERROR_IS_DUP) {
+            if (err->arg1 != NULL)
+                xmlFree((xmlChar *) err->arg1);
+            err->arg1 = NULL;
+            if (err->arg2 != NULL)
+                xmlFree((xmlChar *) err->arg2);
+            err->arg2 = NULL;
+            err->flags = 0;
+        }
+    }
+    ctxt->errNr = level;
+    if (ctxt->errNr <= 0)
+        ctxt->err = NULL;
+}
+
+/**
+ * xmlRelaxNGDumpValidError:
+ * @ctxt:  the validation context
+ *
+ * Show all validation error over a given index.
+ */
+static void
+xmlRelaxNGDumpValidError(xmlRelaxNGValidCtxtPtr ctxt)
+{
+    int i, j, k;
+    xmlRelaxNGValidErrorPtr err, dup;
+
+#ifdef DEBUG_ERROR
+    xmlGenericError(xmlGenericErrorContext,
+                    "Dumping error stack %d errors\n", ctxt->errNr);
+#endif
+    for (i = 0, k = 0; i < ctxt->errNr; i++) {
+        err = &ctxt->errTab[i];
+        if (k < MAX_ERROR) {
+            for (j = 0; j < i; j++) {
+                dup = &ctxt->errTab[j];
+                if ((err->err == dup->err) && (err->node == dup->node) &&
+                    (xmlStrEqual(err->arg1, dup->arg1)) &&
+                    (xmlStrEqual(err->arg2, dup->arg2))) {
+                    goto skip;
+                }
+            }
+            xmlRelaxNGShowValidError(ctxt, err->err, err->node, err->seq,
+                                     err->arg1, err->arg2);
+            k++;
+        }
+      skip:
+        if (err->flags & ERROR_IS_DUP) {
+            if (err->arg1 != NULL)
+                xmlFree((xmlChar *) err->arg1);
+            err->arg1 = NULL;
+            if (err->arg2 != NULL)
+                xmlFree((xmlChar *) err->arg2);
+            err->arg2 = NULL;
+            err->flags = 0;
+        }
+    }
+    ctxt->errNr = 0;
+}
+
+/**
+ * xmlRelaxNGAddValidError:
+ * @ctxt:  the validation context
+ * @err:  the error number
+ * @arg1:  the first argument
+ * @arg2:  the second argument
+ * @dup:  need to dup the args
+ *
+ * Register a validation error, either generating it if it's sure
+ * or stacking it for later handling if unsure.
+ */
+static void
+xmlRelaxNGAddValidError(xmlRelaxNGValidCtxtPtr ctxt,
+                        xmlRelaxNGValidErr err, const xmlChar * arg1,
+                        const xmlChar * arg2, int dup)
+{
+    if (ctxt == NULL)
+        return;
+    if (ctxt->flags & FLAGS_NOERROR)
+        return;
+
+#ifdef DEBUG_ERROR
+    xmlGenericError(xmlGenericErrorContext, "Adding error %d\n", err);
+#endif
+    /*
+     * generate the error directly
+     */
+    if (((ctxt->flags & FLAGS_IGNORABLE) == 0) ||
+	 (ctxt->flags & FLAGS_NEGATIVE)) {
+        xmlNodePtr node, seq;
+
+        /*
+         * Flush first any stacked error which might be the
+         * real cause of the problem.
+         */
+        if (ctxt->errNr != 0)
+            xmlRelaxNGDumpValidError(ctxt);
+        if (ctxt->state != NULL) {
+            node = ctxt->state->node;
+            seq = ctxt->state->seq;
+        } else {
+            node = seq = NULL;
+        }
+        if ((node == NULL) && (seq == NULL)) {
+            node = ctxt->pnode;
+        }
+        xmlRelaxNGShowValidError(ctxt, err, node, seq, arg1, arg2);
+    }
+    /*
+     * Stack the error for later processing if needed
+     */
+    else {
+        xmlRelaxNGValidErrorPush(ctxt, err, arg1, arg2, dup);
+    }
+}
+
+
+/************************************************************************
+ *									*
+ *			Type library hooks				*
+ *									*
+ ************************************************************************/
+static xmlChar *xmlRelaxNGNormalize(xmlRelaxNGValidCtxtPtr ctxt,
+                                    const xmlChar * str);
+
+/**
+ * xmlRelaxNGSchemaTypeHave:
+ * @data:  data needed for the library
+ * @type:  the type name
+ *
+ * Check if the given type is provided by
+ * the W3C XMLSchema Datatype library.
+ *
+ * Returns 1 if yes, 0 if no and -1 in case of error.
+ */
+static int
+xmlRelaxNGSchemaTypeHave(void *data ATTRIBUTE_UNUSED, const xmlChar * type)
+{
+    xmlSchemaTypePtr typ;
+
+    if (type == NULL)
+        return (-1);
+    typ = xmlSchemaGetPredefinedType(type,
+                                     BAD_CAST
+                                     "http://www.w3.org/2001/XMLSchema");
+    if (typ == NULL)
+        return (0);
+    return (1);
+}
+
+/**
+ * xmlRelaxNGSchemaTypeCheck:
+ * @data:  data needed for the library
+ * @type:  the type name
+ * @value:  the value to check
+ * @node:  the node
+ *
+ * Check if the given type and value are validated by
+ * the W3C XMLSchema Datatype library.
+ *
+ * Returns 1 if yes, 0 if no and -1 in case of error.
+ */
+static int
+xmlRelaxNGSchemaTypeCheck(void *data ATTRIBUTE_UNUSED,
+                          const xmlChar * type,
+                          const xmlChar * value,
+                          void **result, xmlNodePtr node)
+{
+    xmlSchemaTypePtr typ;
+    int ret;
+
+    if ((type == NULL) || (value == NULL))
+        return (-1);
+    typ = xmlSchemaGetPredefinedType(type,
+                                     BAD_CAST
+                                     "http://www.w3.org/2001/XMLSchema");
+    if (typ == NULL)
+        return (-1);
+    ret = xmlSchemaValPredefTypeNode(typ, value,
+                                     (xmlSchemaValPtr *) result, node);
+    if (ret == 2)               /* special ID error code */
+        return (2);
+    if (ret == 0)
+        return (1);
+    if (ret > 0)
+        return (0);
+    return (-1);
+}
+
+/**
+ * xmlRelaxNGSchemaFacetCheck:
+ * @data:  data needed for the library
+ * @type:  the type name
+ * @facet:  the facet name
+ * @val:  the facet value
+ * @strval:  the string value
+ * @value:  the value to check
+ *
+ * Function provided by a type library to check a value facet
+ *
+ * Returns 1 if yes, 0 if no and -1 in case of error.
+ */
+static int
+xmlRelaxNGSchemaFacetCheck(void *data ATTRIBUTE_UNUSED,
+                           const xmlChar * type, const xmlChar * facetname,
+                           const xmlChar * val, const xmlChar * strval,
+                           void *value)
+{
+    xmlSchemaFacetPtr facet;
+    xmlSchemaTypePtr typ;
+    int ret;
+
+    if ((type == NULL) || (strval == NULL))
+        return (-1);
+    typ = xmlSchemaGetPredefinedType(type,
+                                     BAD_CAST
+                                     "http://www.w3.org/2001/XMLSchema");
+    if (typ == NULL)
+        return (-1);
+
+    facet = xmlSchemaNewFacet();
+    if (facet == NULL)
+        return (-1);
+
+    if (xmlStrEqual(facetname, BAD_CAST "minInclusive")) {
+        facet->type = XML_SCHEMA_FACET_MININCLUSIVE;
+    } else if (xmlStrEqual(facetname, BAD_CAST "minExclusive")) {
+        facet->type = XML_SCHEMA_FACET_MINEXCLUSIVE;
+    } else if (xmlStrEqual(facetname, BAD_CAST "maxInclusive")) {
+        facet->type = XML_SCHEMA_FACET_MAXINCLUSIVE;
+    } else if (xmlStrEqual(facetname, BAD_CAST "maxExclusive")) {
+        facet->type = XML_SCHEMA_FACET_MAXEXCLUSIVE;
+    } else if (xmlStrEqual(facetname, BAD_CAST "totalDigits")) {
+        facet->type = XML_SCHEMA_FACET_TOTALDIGITS;
+    } else if (xmlStrEqual(facetname, BAD_CAST "fractionDigits")) {
+        facet->type = XML_SCHEMA_FACET_FRACTIONDIGITS;
+    } else if (xmlStrEqual(facetname, BAD_CAST "pattern")) {
+        facet->type = XML_SCHEMA_FACET_PATTERN;
+    } else if (xmlStrEqual(facetname, BAD_CAST "enumeration")) {
+        facet->type = XML_SCHEMA_FACET_ENUMERATION;
+    } else if (xmlStrEqual(facetname, BAD_CAST "whiteSpace")) {
+        facet->type = XML_SCHEMA_FACET_WHITESPACE;
+    } else if (xmlStrEqual(facetname, BAD_CAST "length")) {
+        facet->type = XML_SCHEMA_FACET_LENGTH;
+    } else if (xmlStrEqual(facetname, BAD_CAST "maxLength")) {
+        facet->type = XML_SCHEMA_FACET_MAXLENGTH;
+    } else if (xmlStrEqual(facetname, BAD_CAST "minLength")) {
+        facet->type = XML_SCHEMA_FACET_MINLENGTH;
+    } else {
+        xmlSchemaFreeFacet(facet);
+        return (-1);
+    }
+    facet->value = val;
+    ret = xmlSchemaCheckFacet(facet, typ, NULL, type);
+    if (ret != 0) {
+        xmlSchemaFreeFacet(facet);
+        return (-1);
+    }
+    ret = xmlSchemaValidateFacet(typ, facet, strval, value);
+    xmlSchemaFreeFacet(facet);
+    if (ret != 0)
+        return (-1);
+    return (0);
+}
+
+/**
+ * xmlRelaxNGSchemaFreeValue:
+ * @data:  data needed for the library
+ * @value:  the value to free
+ *
+ * Function provided by a type library to free a Schemas value
+ *
+ * Returns 1 if yes, 0 if no and -1 in case of error.
+ */
+static void
+xmlRelaxNGSchemaFreeValue(void *data ATTRIBUTE_UNUSED, void *value)
+{
+    xmlSchemaFreeValue(value);
+}
+
+/**
+ * xmlRelaxNGSchemaTypeCompare:
+ * @data:  data needed for the library
+ * @type:  the type name
+ * @value1:  the first value
+ * @value2:  the second value
+ *
+ * Compare two values for equality accordingly a type from the W3C XMLSchema
+ * Datatype library.
+ *
+ * Returns 1 if equal, 0 if no and -1 in case of error.
+ */
+static int
+xmlRelaxNGSchemaTypeCompare(void *data ATTRIBUTE_UNUSED,
+                            const xmlChar * type,
+                            const xmlChar * value1,
+                            xmlNodePtr ctxt1,
+                            void *comp1,
+                            const xmlChar * value2, xmlNodePtr ctxt2)
+{
+    int ret;
+    xmlSchemaTypePtr typ;
+    xmlSchemaValPtr res1 = NULL, res2 = NULL;
+
+    if ((type == NULL) || (value1 == NULL) || (value2 == NULL))
+        return (-1);
+    typ = xmlSchemaGetPredefinedType(type,
+                                     BAD_CAST
+                                     "http://www.w3.org/2001/XMLSchema");
+    if (typ == NULL)
+        return (-1);
+    if (comp1 == NULL) {
+        ret = xmlSchemaValPredefTypeNode(typ, value1, &res1, ctxt1);
+        if (ret != 0)
+            return (-1);
+        if (res1 == NULL)
+            return (-1);
+    } else {
+        res1 = (xmlSchemaValPtr) comp1;
+    }
+    ret = xmlSchemaValPredefTypeNode(typ, value2, &res2, ctxt2);
+    if (ret != 0) {
+	if (res1 != (xmlSchemaValPtr) comp1)
+	    xmlSchemaFreeValue(res1);
+        return (-1);
+    }
+    ret = xmlSchemaCompareValues(res1, res2);
+    if (res1 != (xmlSchemaValPtr) comp1)
+        xmlSchemaFreeValue(res1);
+    xmlSchemaFreeValue(res2);
+    if (ret == -2)
+        return (-1);
+    if (ret == 0)
+        return (1);
+    return (0);
+}
+
+/**
+ * xmlRelaxNGDefaultTypeHave:
+ * @data:  data needed for the library
+ * @type:  the type name
+ *
+ * Check if the given type is provided by
+ * the default datatype library.
+ *
+ * Returns 1 if yes, 0 if no and -1 in case of error.
+ */
+static int
+xmlRelaxNGDefaultTypeHave(void *data ATTRIBUTE_UNUSED,
+                          const xmlChar * type)
+{
+    if (type == NULL)
+        return (-1);
+    if (xmlStrEqual(type, BAD_CAST "string"))
+        return (1);
+    if (xmlStrEqual(type, BAD_CAST "token"))
+        return (1);
+    return (0);
+}
+
+/**
+ * xmlRelaxNGDefaultTypeCheck:
+ * @data:  data needed for the library
+ * @type:  the type name
+ * @value:  the value to check
+ * @node:  the node
+ *
+ * Check if the given type and value are validated by
+ * the default datatype library.
+ *
+ * Returns 1 if yes, 0 if no and -1 in case of error.
+ */
+static int
+xmlRelaxNGDefaultTypeCheck(void *data ATTRIBUTE_UNUSED,
+                           const xmlChar * type ATTRIBUTE_UNUSED,
+                           const xmlChar * value ATTRIBUTE_UNUSED,
+                           void **result ATTRIBUTE_UNUSED,
+                           xmlNodePtr node ATTRIBUTE_UNUSED)
+{
+    if (value == NULL)
+        return (-1);
+    if (xmlStrEqual(type, BAD_CAST "string"))
+        return (1);
+    if (xmlStrEqual(type, BAD_CAST "token")) {
+        return (1);
+    }
+
+    return (0);
+}
+
+/**
+ * xmlRelaxNGDefaultTypeCompare:
+ * @data:  data needed for the library
+ * @type:  the type name
+ * @value1:  the first value
+ * @value2:  the second value
+ *
+ * Compare two values accordingly a type from the default
+ * datatype library.
+ *
+ * Returns 1 if yes, 0 if no and -1 in case of error.
+ */
+static int
+xmlRelaxNGDefaultTypeCompare(void *data ATTRIBUTE_UNUSED,
+                             const xmlChar * type,
+                             const xmlChar * value1,
+                             xmlNodePtr ctxt1 ATTRIBUTE_UNUSED,
+                             void *comp1 ATTRIBUTE_UNUSED,
+                             const xmlChar * value2,
+                             xmlNodePtr ctxt2 ATTRIBUTE_UNUSED)
+{
+    int ret = -1;
+
+    if (xmlStrEqual(type, BAD_CAST "string")) {
+        ret = xmlStrEqual(value1, value2);
+    } else if (xmlStrEqual(type, BAD_CAST "token")) {
+        if (!xmlStrEqual(value1, value2)) {
+            xmlChar *nval, *nvalue;
+
+            /*
+             * TODO: trivial optimizations are possible by
+             * computing at compile-time
+             */
+            nval = xmlRelaxNGNormalize(NULL, value1);
+            nvalue = xmlRelaxNGNormalize(NULL, value2);
+
+            if ((nval == NULL) || (nvalue == NULL))
+                ret = -1;
+            else if (xmlStrEqual(nval, nvalue))
+                ret = 1;
+            else
+                ret = 0;
+            if (nval != NULL)
+                xmlFree(nval);
+            if (nvalue != NULL)
+                xmlFree(nvalue);
+        } else
+            ret = 1;
+    }
+    return (ret);
+}
+
+static int xmlRelaxNGTypeInitialized = 0;
+static xmlHashTablePtr xmlRelaxNGRegisteredTypes = NULL;
+
+/**
+ * xmlRelaxNGFreeTypeLibrary:
+ * @lib:  the type library structure
+ * @namespace:  the URI bound to the library
+ *
+ * Free the structure associated to the type library
+ */
+static void
+xmlRelaxNGFreeTypeLibrary(xmlRelaxNGTypeLibraryPtr lib,
+                          const xmlChar * namespace ATTRIBUTE_UNUSED)
+{
+    if (lib == NULL)
+        return;
+    if (lib->namespace != NULL)
+        xmlFree((xmlChar *) lib->namespace);
+    xmlFree(lib);
+}
+
+/**
+ * xmlRelaxNGRegisterTypeLibrary:
+ * @namespace:  the URI bound to the library
+ * @data:  data associated to the library
+ * @have:  the provide function
+ * @check:  the checking function
+ * @comp:  the comparison function
+ *
+ * Register a new type library
+ *
+ * Returns 0 in case of success and -1 in case of error.
+ */
+static int
+xmlRelaxNGRegisterTypeLibrary(const xmlChar * namespace, void *data,
+                              xmlRelaxNGTypeHave have,
+                              xmlRelaxNGTypeCheck check,
+                              xmlRelaxNGTypeCompare comp,
+                              xmlRelaxNGFacetCheck facet,
+                              xmlRelaxNGTypeFree freef)
+{
+    xmlRelaxNGTypeLibraryPtr lib;
+    int ret;
+
+    if ((xmlRelaxNGRegisteredTypes == NULL) || (namespace == NULL) ||
+        (check == NULL) || (comp == NULL))
+        return (-1);
+    if (xmlHashLookup(xmlRelaxNGRegisteredTypes, namespace) != NULL) {
+        xmlGenericError(xmlGenericErrorContext,
+                        "Relax-NG types library '%s' already registered\n",
+                        namespace);
+        return (-1);
+    }
+    lib =
+        (xmlRelaxNGTypeLibraryPtr)
+        xmlMalloc(sizeof(xmlRelaxNGTypeLibrary));
+    if (lib == NULL) {
+        xmlRngVErrMemory(NULL, "adding types library\n");
+        return (-1);
+    }
+    memset(lib, 0, sizeof(xmlRelaxNGTypeLibrary));
+    lib->namespace = xmlStrdup(namespace);
+    lib->data = data;
+    lib->have = have;
+    lib->comp = comp;
+    lib->check = check;
+    lib->facet = facet;
+    lib->freef = freef;
+    ret = xmlHashAddEntry(xmlRelaxNGRegisteredTypes, namespace, lib);
+    if (ret < 0) {
+        xmlGenericError(xmlGenericErrorContext,
+                        "Relax-NG types library failed to register '%s'\n",
+                        namespace);
+        xmlRelaxNGFreeTypeLibrary(lib, namespace);
+        return (-1);
+    }
+    return (0);
+}
+
+/**
+ * xmlRelaxNGInitTypes:
+ *
+ * Initilize the default type libraries.
+ *
+ * Returns 0 in case of success and -1 in case of error.
+ */
+int
+xmlRelaxNGInitTypes(void)
+{
+    if (xmlRelaxNGTypeInitialized != 0)
+        return (0);
+    xmlRelaxNGRegisteredTypes = xmlHashCreate(10);
+    if (xmlRelaxNGRegisteredTypes == NULL) {
+        xmlGenericError(xmlGenericErrorContext,
+                        "Failed to allocate sh table for Relax-NG types\n");
+        return (-1);
+    }
+    xmlRelaxNGRegisterTypeLibrary(BAD_CAST
+                                  "http://www.w3.org/2001/XMLSchema-datatypes",
+                                  NULL, xmlRelaxNGSchemaTypeHave,
+                                  xmlRelaxNGSchemaTypeCheck,
+                                  xmlRelaxNGSchemaTypeCompare,
+                                  xmlRelaxNGSchemaFacetCheck,
+                                  xmlRelaxNGSchemaFreeValue);
+    xmlRelaxNGRegisterTypeLibrary(xmlRelaxNGNs, NULL,
+                                  xmlRelaxNGDefaultTypeHave,
+                                  xmlRelaxNGDefaultTypeCheck,
+                                  xmlRelaxNGDefaultTypeCompare, NULL,
+                                  NULL);
+    xmlRelaxNGTypeInitialized = 1;
+    return (0);
+}
+
+/**
+ * xmlRelaxNGCleanupTypes:
+ *
+ * Cleanup the default Schemas type library associated to RelaxNG
+ */
+void
+xmlRelaxNGCleanupTypes(void)
+{
+    xmlSchemaCleanupTypes();
+    if (xmlRelaxNGTypeInitialized == 0)
+        return;
+    xmlHashFree(xmlRelaxNGRegisteredTypes, (xmlHashDeallocator)
+                xmlRelaxNGFreeTypeLibrary);
+    xmlRelaxNGTypeInitialized = 0;
+}
+
+/************************************************************************
+ *									*
+ *		Compiling element content into regexp			*
+ *									*
+ * Sometime the element content can be compiled into a pure regexp,	*
+ * This allows a faster execution and streamability at that level	*
+ *									*
+ ************************************************************************/
+
+/* from automata.c but not exported */
+void xmlAutomataSetFlags(xmlAutomataPtr am, int flags);
+
+
+static int xmlRelaxNGTryCompile(xmlRelaxNGParserCtxtPtr ctxt,
+                                xmlRelaxNGDefinePtr def);
+
+/**
+ * xmlRelaxNGIsCompileable:
+ * @define:  the definition to check
+ *
+ * Check if a definition is nullable.
+ *
+ * Returns 1 if yes, 0 if no and -1 in case of error
+ */
+static int
+xmlRelaxNGIsCompileable(xmlRelaxNGDefinePtr def)
+{
+    int ret = -1;
+
+    if (def == NULL) {
+        return (-1);
+    }
+    if ((def->type != XML_RELAXNG_ELEMENT) &&
+        (def->dflags & IS_COMPILABLE))
+        return (1);
+    if ((def->type != XML_RELAXNG_ELEMENT) &&
+        (def->dflags & IS_NOT_COMPILABLE))
+        return (0);
+    switch (def->type) {
+        case XML_RELAXNG_NOOP:
+            ret = xmlRelaxNGIsCompileable(def->content);
+            break;
+        case XML_RELAXNG_TEXT:
+        case XML_RELAXNG_EMPTY:
+            ret = 1;
+            break;
+        case XML_RELAXNG_ELEMENT:
+            /*
+             * Check if the element content is compileable
+             */
+            if (((def->dflags & IS_NOT_COMPILABLE) == 0) &&
+                ((def->dflags & IS_COMPILABLE) == 0)) {
+                xmlRelaxNGDefinePtr list;
+
+                list = def->content;
+                while (list != NULL) {
+                    ret = xmlRelaxNGIsCompileable(list);
+                    if (ret != 1)
+                        break;
+                    list = list->next;
+                }
+		/*
+		 * Because the routine is recursive, we must guard against
+		 * discovering both COMPILABLE and NOT_COMPILABLE
+		 */
+                if (ret == 0) {
+		    def->dflags &= ~IS_COMPILABLE;
+                    def->dflags |= IS_NOT_COMPILABLE;
+		}
+                if ((ret == 1) && !(def->dflags &= IS_NOT_COMPILABLE))
+                    def->dflags |= IS_COMPILABLE;
+#ifdef DEBUG_COMPILE
+                if (ret == 1) {
+                    xmlGenericError(xmlGenericErrorContext,
+                                    "element content for %s is compilable\n",
+                                    def->name);
+                } else if (ret == 0) {
+                    xmlGenericError(xmlGenericErrorContext,
+                                    "element content for %s is not compilable\n",
+                                    def->name);
+                } else {
+                    xmlGenericError(xmlGenericErrorContext,
+                                    "Problem in RelaxNGIsCompileable for element %s\n",
+                                    def->name);
+                }
+#endif
+            }
+            /*
+             * All elements return a compileable status unless they
+             * are generic like anyName
+             */
+            if ((def->nameClass != NULL) || (def->name == NULL))
+                ret = 0;
+            else
+                ret = 1;
+            return (ret);
+        case XML_RELAXNG_REF:
+        case XML_RELAXNG_EXTERNALREF:
+        case XML_RELAXNG_PARENTREF:
+            if (def->depth == -20) {
+                return (1);
+            } else {
+                xmlRelaxNGDefinePtr list;
+
+                def->depth = -20;
+                list = def->content;
+                while (list != NULL) {
+                    ret = xmlRelaxNGIsCompileable(list);
+                    if (ret != 1)
+                        break;
+                    list = list->next;
+                }
+            }
+            break;
+        case XML_RELAXNG_START:
+        case XML_RELAXNG_OPTIONAL:
+        case XML_RELAXNG_ZEROORMORE:
+        case XML_RELAXNG_ONEORMORE:
+        case XML_RELAXNG_CHOICE:
+        case XML_RELAXNG_GROUP:
+        case XML_RELAXNG_DEF:{
+                xmlRelaxNGDefinePtr list;
+
+                list = def->content;
+                while (list != NULL) {
+                    ret = xmlRelaxNGIsCompileable(list);
+                    if (ret != 1)
+                        break;
+                    list = list->next;
+                }
+                break;
+            }
+        case XML_RELAXNG_EXCEPT:
+        case XML_RELAXNG_ATTRIBUTE:
+        case XML_RELAXNG_INTERLEAVE:
+        case XML_RELAXNG_DATATYPE:
+        case XML_RELAXNG_LIST:
+        case XML_RELAXNG_PARAM:
+        case XML_RELAXNG_VALUE:
+        case XML_RELAXNG_NOT_ALLOWED:
+            ret = 0;
+            break;
+    }
+    if (ret == 0)
+        def->dflags |= IS_NOT_COMPILABLE;
+    if (ret == 1)
+        def->dflags |= IS_COMPILABLE;
+#ifdef DEBUG_COMPILE
+    if (ret == 1) {
+        xmlGenericError(xmlGenericErrorContext,
+                        "RelaxNGIsCompileable %s : true\n",
+                        xmlRelaxNGDefName(def));
+    } else if (ret == 0) {
+        xmlGenericError(xmlGenericErrorContext,
+                        "RelaxNGIsCompileable %s : false\n",
+                        xmlRelaxNGDefName(def));
+    } else {
+        xmlGenericError(xmlGenericErrorContext,
+                        "Problem in RelaxNGIsCompileable %s\n",
+                        xmlRelaxNGDefName(def));
+    }
+#endif
+    return (ret);
+}
+
+/**
+ * xmlRelaxNGCompile:
+ * ctxt:  the RelaxNG parser context
+ * @define:  the definition tree to compile
+ *
+ * Compile the set of definitions, it works recursively, till the
+ * element boundaries, where it tries to compile the content if possible
+ *
+ * Returns 0 if success and -1 in case of error
+ */
+static int
+xmlRelaxNGCompile(xmlRelaxNGParserCtxtPtr ctxt, xmlRelaxNGDefinePtr def)
+{
+    int ret = 0;
+    xmlRelaxNGDefinePtr list;
+
+    if ((ctxt == NULL) || (def == NULL))
+        return (-1);
+
+    switch (def->type) {
+        case XML_RELAXNG_START:
+            if ((xmlRelaxNGIsCompileable(def) == 1) && (def->depth != -25)) {
+                xmlAutomataPtr oldam = ctxt->am;
+                xmlAutomataStatePtr oldstate = ctxt->state;
+
+                def->depth = -25;
+
+                list = def->content;
+                ctxt->am = xmlNewAutomata();
+                if (ctxt->am == NULL)
+                    return (-1);
+
+                /*
+                 * assume identical strings but not same pointer are different
+                 * atoms, needed for non-determinism detection
+                 * That way if 2 elements with the same name are in a choice
+                 * branch the automata is found non-deterministic and
+                 * we fallback to the normal validation which does the right
+                 * thing of exploring both choices.
+                 */
+                xmlAutomataSetFlags(ctxt->am, 1);
+
+                ctxt->state = xmlAutomataGetInitState(ctxt->am);
+                while (list != NULL) {
+                    xmlRelaxNGCompile(ctxt, list);
+                    list = list->next;
+                }
+                xmlAutomataSetFinalState(ctxt->am, ctxt->state);
+                if (xmlAutomataIsDeterminist(ctxt->am))
+                    def->contModel = xmlAutomataCompile(ctxt->am);
+
+                xmlFreeAutomata(ctxt->am);
+                ctxt->state = oldstate;
+                ctxt->am = oldam;
+            }
+            break;
+        case XML_RELAXNG_ELEMENT:
+            if ((ctxt->am != NULL) && (def->name != NULL)) {
+                ctxt->state = xmlAutomataNewTransition2(ctxt->am,
+                                                        ctxt->state, NULL,
+                                                        def->name, def->ns,
+                                                        def);
+            }
+            if ((def->dflags & IS_COMPILABLE) && (def->depth != -25)) {
+                xmlAutomataPtr oldam = ctxt->am;
+                xmlAutomataStatePtr oldstate = ctxt->state;
+
+                def->depth = -25;
+
+                list = def->content;
+                ctxt->am = xmlNewAutomata();
+                if (ctxt->am == NULL)
+                    return (-1);
+                xmlAutomataSetFlags(ctxt->am, 1);
+                ctxt->state = xmlAutomataGetInitState(ctxt->am);
+                while (list != NULL) {
+                    xmlRelaxNGCompile(ctxt, list);
+                    list = list->next;
+                }
+                xmlAutomataSetFinalState(ctxt->am, ctxt->state);
+                def->contModel = xmlAutomataCompile(ctxt->am);
+                if (!xmlRegexpIsDeterminist(def->contModel)) {
+#ifdef DEBUG_COMPILE
+                    xmlGenericError(xmlGenericErrorContext,
+                        "Content model not determinist %s\n",
+                                    def->name);
+#endif
+                    /*
+                     * we can only use the automata if it is determinist
+                     */
+                    xmlRegFreeRegexp(def->contModel);
+                    def->contModel = NULL;
+                }
+                xmlFreeAutomata(ctxt->am);
+                ctxt->state = oldstate;
+                ctxt->am = oldam;
+            } else {
+                xmlAutomataPtr oldam = ctxt->am;
+
+                /*
+                 * we can't build the content model for this element content
+                 * but it still might be possible to build it for some of its
+                 * children, recurse.
+                 */
+                ret = xmlRelaxNGTryCompile(ctxt, def);
+                ctxt->am = oldam;
+            }
+            break;
+        case XML_RELAXNG_NOOP:
+            ret = xmlRelaxNGCompile(ctxt, def->content);
+            break;
+        case XML_RELAXNG_OPTIONAL:{
+                xmlAutomataStatePtr oldstate = ctxt->state;
+
+                list = def->content;
+                while (list != NULL) {
+                    xmlRelaxNGCompile(ctxt, list);
+                    list = list->next;
+                }
+                xmlAutomataNewEpsilon(ctxt->am, oldstate, ctxt->state);
+                break;
+            }
+        case XML_RELAXNG_ZEROORMORE:{
+                xmlAutomataStatePtr oldstate;
+
+                ctxt->state =
+                    xmlAutomataNewEpsilon(ctxt->am, ctxt->state, NULL);
+                oldstate = ctxt->state;
+                list = def->content;
+                while (list != NULL) {
+                    xmlRelaxNGCompile(ctxt, list);
+                    list = list->next;
+                }
+                xmlAutomataNewEpsilon(ctxt->am, ctxt->state, oldstate);
+                ctxt->state =
+                    xmlAutomataNewEpsilon(ctxt->am, oldstate, NULL);
+                break;
+            }
+        case XML_RELAXNG_ONEORMORE:{
+                xmlAutomataStatePtr oldstate;
+
+                list = def->content;
+                while (list != NULL) {
+                    xmlRelaxNGCompile(ctxt, list);
+                    list = list->next;
+                }
+                oldstate = ctxt->state;
+                list = def->content;
+                while (list != NULL) {
+                    xmlRelaxNGCompile(ctxt, list);
+                    list = list->next;
+                }
+                xmlAutomataNewEpsilon(ctxt->am, ctxt->state, oldstate);
+                ctxt->state =
+                    xmlAutomataNewEpsilon(ctxt->am, oldstate, NULL);
+                break;
+            }
+        case XML_RELAXNG_CHOICE:{
+                xmlAutomataStatePtr target = NULL;
+                xmlAutomataStatePtr oldstate = ctxt->state;
+
+                list = def->content;
+                while (list != NULL) {
+                    ctxt->state = oldstate;
+                    ret = xmlRelaxNGCompile(ctxt, list);
+                    if (ret != 0)
+                        break;
+                    if (target == NULL)
+                        target = ctxt->state;
+                    else {
+                        xmlAutomataNewEpsilon(ctxt->am, ctxt->state,
+                                              target);
+                    }
+                    list = list->next;
+                }
+                ctxt->state = target;
+
+                break;
+            }
+        case XML_RELAXNG_REF:
+        case XML_RELAXNG_EXTERNALREF:
+        case XML_RELAXNG_PARENTREF:
+        case XML_RELAXNG_GROUP:
+        case XML_RELAXNG_DEF:
+            list = def->content;
+            while (list != NULL) {
+                ret = xmlRelaxNGCompile(ctxt, list);
+                if (ret != 0)
+                    break;
+                list = list->next;
+            }
+            break;
+        case XML_RELAXNG_TEXT:{
+                xmlAutomataStatePtr oldstate;
+
+                ctxt->state =
+                    xmlAutomataNewEpsilon(ctxt->am, ctxt->state, NULL);
+                oldstate = ctxt->state;
+                xmlRelaxNGCompile(ctxt, def->content);
+                xmlAutomataNewTransition(ctxt->am, ctxt->state,
+                                         ctxt->state, BAD_CAST "#text",
+                                         NULL);
+                ctxt->state =
+                    xmlAutomataNewEpsilon(ctxt->am, oldstate, NULL);
+                break;
+            }
+        case XML_RELAXNG_EMPTY:
+            ctxt->state =
+                xmlAutomataNewEpsilon(ctxt->am, ctxt->state, NULL);
+            break;
+        case XML_RELAXNG_EXCEPT:
+        case XML_RELAXNG_ATTRIBUTE:
+        case XML_RELAXNG_INTERLEAVE:
+        case XML_RELAXNG_NOT_ALLOWED:
+        case XML_RELAXNG_DATATYPE:
+        case XML_RELAXNG_LIST:
+        case XML_RELAXNG_PARAM:
+        case XML_RELAXNG_VALUE:
+            /* This should not happen and generate an internal error */
+            fprintf(stderr, "RNG internal error trying to compile %s\n",
+                    xmlRelaxNGDefName(def));
+            break;
+    }
+    return (ret);
+}
+
+/**
+ * xmlRelaxNGTryCompile:
+ * ctxt:  the RelaxNG parser context
+ * @define:  the definition tree to compile
+ *
+ * Try to compile the set of definitions, it works recursively,
+ * possibly ignoring parts which cannot be compiled.
+ *
+ * Returns 0 if success and -1 in case of error
+ */
+static int
+xmlRelaxNGTryCompile(xmlRelaxNGParserCtxtPtr ctxt, xmlRelaxNGDefinePtr def)
+{
+    int ret = 0;
+    xmlRelaxNGDefinePtr list;
+
+    if ((ctxt == NULL) || (def == NULL))
+        return (-1);
+
+    if ((def->type == XML_RELAXNG_START) ||
+        (def->type == XML_RELAXNG_ELEMENT)) {
+        ret = xmlRelaxNGIsCompileable(def);
+        if ((def->dflags & IS_COMPILABLE) && (def->depth != -25)) {
+            ctxt->am = NULL;
+            ret = xmlRelaxNGCompile(ctxt, def);
+#ifdef DEBUG_PROGRESSIVE
+            if (ret == 0) {
+                if (def->type == XML_RELAXNG_START)
+                    xmlGenericError(xmlGenericErrorContext,
+                                    "compiled the start\n");
+                else
+                    xmlGenericError(xmlGenericErrorContext,
+                                    "compiled element %s\n", def->name);
+            } else {
+                if (def->type == XML_RELAXNG_START)
+                    xmlGenericError(xmlGenericErrorContext,
+                                    "failed to compile the start\n");
+                else
+                    xmlGenericError(xmlGenericErrorContext,
+                                    "failed to compile element %s\n",
+                                    def->name);
+            }
+#endif
+            return (ret);
+        }
+    }
+    switch (def->type) {
+        case XML_RELAXNG_NOOP:
+            ret = xmlRelaxNGTryCompile(ctxt, def->content);
+            break;
+        case XML_RELAXNG_TEXT:
+        case XML_RELAXNG_DATATYPE:
+        case XML_RELAXNG_LIST:
+        case XML_RELAXNG_PARAM:
+        case XML_RELAXNG_VALUE:
+        case XML_RELAXNG_EMPTY:
+        case XML_RELAXNG_ELEMENT:
+            ret = 0;
+            break;
+        case XML_RELAXNG_OPTIONAL:
+        case XML_RELAXNG_ZEROORMORE:
+        case XML_RELAXNG_ONEORMORE:
+        case XML_RELAXNG_CHOICE:
+        case XML_RELAXNG_GROUP:
+        case XML_RELAXNG_DEF:
+        case XML_RELAXNG_START:
+        case XML_RELAXNG_REF:
+        case XML_RELAXNG_EXTERNALREF:
+        case XML_RELAXNG_PARENTREF:
+            list = def->content;
+            while (list != NULL) {
+                ret = xmlRelaxNGTryCompile(ctxt, list);
+                if (ret != 0)
+                    break;
+                list = list->next;
+            }
+            break;
+        case XML_RELAXNG_EXCEPT:
+        case XML_RELAXNG_ATTRIBUTE:
+        case XML_RELAXNG_INTERLEAVE:
+        case XML_RELAXNG_NOT_ALLOWED:
+            ret = 0;
+            break;
+    }
+    return (ret);
+}
+
+/************************************************************************
+ *									*
+ *			Parsing functions				*
+ *									*
+ ************************************************************************/
+
+static xmlRelaxNGDefinePtr xmlRelaxNGParseAttribute(xmlRelaxNGParserCtxtPtr
+                                                    ctxt, xmlNodePtr node);
+static xmlRelaxNGDefinePtr xmlRelaxNGParseElement(xmlRelaxNGParserCtxtPtr
+                                                  ctxt, xmlNodePtr node);
+static xmlRelaxNGDefinePtr xmlRelaxNGParsePatterns(xmlRelaxNGParserCtxtPtr
+                                                   ctxt, xmlNodePtr nodes,
+                                                   int group);
+static xmlRelaxNGDefinePtr xmlRelaxNGParsePattern(xmlRelaxNGParserCtxtPtr
+                                                  ctxt, xmlNodePtr node);
+static xmlRelaxNGPtr xmlRelaxNGParseDocument(xmlRelaxNGParserCtxtPtr ctxt,
+                                             xmlNodePtr node);
+static int xmlRelaxNGParseGrammarContent(xmlRelaxNGParserCtxtPtr ctxt,
+                                         xmlNodePtr nodes);
+static xmlRelaxNGDefinePtr xmlRelaxNGParseNameClass(xmlRelaxNGParserCtxtPtr
+                                                    ctxt, xmlNodePtr node,
+                                                    xmlRelaxNGDefinePtr
+                                                    def);
+static xmlRelaxNGGrammarPtr xmlRelaxNGParseGrammar(xmlRelaxNGParserCtxtPtr
+                                                   ctxt, xmlNodePtr nodes);
+static int xmlRelaxNGElementMatch(xmlRelaxNGValidCtxtPtr ctxt,
+                                  xmlRelaxNGDefinePtr define,
+                                  xmlNodePtr elem);
+
+
+#define IS_BLANK_NODE(n) (xmlRelaxNGIsBlank((n)->content))
+
+/**
+ * xmlRelaxNGIsNullable:
+ * @define:  the definition to verify
+ *
+ * Check if a definition is nullable.
+ *
+ * Returns 1 if yes, 0 if no and -1 in case of error
+ */
+static int
+xmlRelaxNGIsNullable(xmlRelaxNGDefinePtr define)
+{
+    int ret;
+
+    if (define == NULL)
+        return (-1);
+
+    if (define->dflags & IS_NULLABLE)
+        return (1);
+    if (define->dflags & IS_NOT_NULLABLE)
+        return (0);
+    switch (define->type) {
+        case XML_RELAXNG_EMPTY:
+        case XML_RELAXNG_TEXT:
+            ret = 1;
+            break;
+        case XML_RELAXNG_NOOP:
+        case XML_RELAXNG_DEF:
+        case XML_RELAXNG_REF:
+        case XML_RELAXNG_EXTERNALREF:
+        case XML_RELAXNG_PARENTREF:
+        case XML_RELAXNG_ONEORMORE:
+            ret = xmlRelaxNGIsNullable(define->content);
+            break;
+        case XML_RELAXNG_EXCEPT:
+        case XML_RELAXNG_NOT_ALLOWED:
+        case XML_RELAXNG_ELEMENT:
+        case XML_RELAXNG_DATATYPE:
+        case XML_RELAXNG_PARAM:
+        case XML_RELAXNG_VALUE:
+        case XML_RELAXNG_LIST:
+        case XML_RELAXNG_ATTRIBUTE:
+            ret = 0;
+            break;
+        case XML_RELAXNG_CHOICE:{
+                xmlRelaxNGDefinePtr list = define->content;
+
+                while (list != NULL) {
+                    ret = xmlRelaxNGIsNullable(list);
+                    if (ret != 0)
+                        goto done;
+                    list = list->next;
+                }
+                ret = 0;
+                break;
+            }
+        case XML_RELAXNG_START:
+        case XML_RELAXNG_INTERLEAVE:
+        case XML_RELAXNG_GROUP:{
+                xmlRelaxNGDefinePtr list = define->content;
+
+                while (list != NULL) {
+                    ret = xmlRelaxNGIsNullable(list);
+                    if (ret != 1)
+                        goto done;
+                    list = list->next;
+                }
+                return (1);
+            }
+        default:
+            return (-1);
+    }
+  done:
+    if (ret == 0)
+        define->dflags |= IS_NOT_NULLABLE;
+    if (ret == 1)
+        define->dflags |= IS_NULLABLE;
+    return (ret);
+}
+
+/**
+ * xmlRelaxNGIsBlank:
+ * @str:  a string
+ *
+ * Check if a string is ignorable c.f. 4.2. Whitespace
+ *
+ * Returns 1 if the string is NULL or made of blanks chars, 0 otherwise
+ */
+static int
+xmlRelaxNGIsBlank(xmlChar * str)
+{
+    if (str == NULL)
+        return (1);
+    while (*str != 0) {
+        if (!(IS_BLANK_CH(*str)))
+            return (0);
+        str++;
+    }
+    return (1);
+}
+
+/**
+ * xmlRelaxNGGetDataTypeLibrary:
+ * @ctxt:  a Relax-NG parser context
+ * @node:  the current data or value element
+ *
+ * Applies algorithm from 4.3. datatypeLibrary attribute
+ *
+ * Returns the datatypeLibary value or NULL if not found
+ */
+static xmlChar *
+xmlRelaxNGGetDataTypeLibrary(xmlRelaxNGParserCtxtPtr ctxt ATTRIBUTE_UNUSED,
+                             xmlNodePtr node)
+{
+    xmlChar *ret, *escape;
+
+    if (node == NULL)
+        return(NULL);
+
+    if ((IS_RELAXNG(node, "data")) || (IS_RELAXNG(node, "value"))) {
+        ret = xmlGetProp(node, BAD_CAST "datatypeLibrary");
+        if (ret != NULL) {
+            if (ret[0] == 0) {
+                xmlFree(ret);
+                return (NULL);
+            }
+            escape = xmlURIEscapeStr(ret, BAD_CAST ":/#?");
+            if (escape == NULL) {
+                return (ret);
+            }
+            xmlFree(ret);
+            return (escape);
+        }
+    }
+    node = node->parent;
+    while ((node != NULL) && (node->type == XML_ELEMENT_NODE)) {
+        ret = xmlGetProp(node, BAD_CAST "datatypeLibrary");
+        if (ret != NULL) {
+            if (ret[0] == 0) {
+                xmlFree(ret);
+                return (NULL);
+            }
+            escape = xmlURIEscapeStr(ret, BAD_CAST ":/#?");
+            if (escape == NULL) {
+                return (ret);
+            }
+            xmlFree(ret);
+            return (escape);
+        }
+        node = node->parent;
+    }
+    return (NULL);
+}
+
+/**
+ * xmlRelaxNGParseValue:
+ * @ctxt:  a Relax-NG parser context
+ * @node:  the data node.
+ *
+ * parse the content of a RelaxNG value node.
+ *
+ * Returns the definition pointer or NULL in case of error
+ */
+static xmlRelaxNGDefinePtr
+xmlRelaxNGParseValue(xmlRelaxNGParserCtxtPtr ctxt, xmlNodePtr node)
+{
+    xmlRelaxNGDefinePtr def = NULL;
+    xmlRelaxNGTypeLibraryPtr lib = NULL;
+    xmlChar *type;
+    xmlChar *library;
+    int success = 0;
+
+    def = xmlRelaxNGNewDefine(ctxt, node);
+    if (def == NULL)
+        return (NULL);
+    def->type = XML_RELAXNG_VALUE;
+
+    type = xmlGetProp(node, BAD_CAST "type");
+    if (type != NULL) {
+        xmlRelaxNGNormExtSpace(type);
+        if (xmlValidateNCName(type, 0)) {
+            xmlRngPErr(ctxt, node, XML_RNGP_TYPE_VALUE,
+                       "value type '%s' is not an NCName\n", type, NULL);
+        }
+        library = xmlRelaxNGGetDataTypeLibrary(ctxt, node);
+        if (library == NULL)
+            library =
+                xmlStrdup(BAD_CAST "http://relaxng.org/ns/structure/1.0");
+
+        def->name = type;
+        def->ns = library;
+
+        lib = (xmlRelaxNGTypeLibraryPtr)
+            xmlHashLookup(xmlRelaxNGRegisteredTypes, library);
+        if (lib == NULL) {
+            xmlRngPErr(ctxt, node, XML_RNGP_UNKNOWN_TYPE_LIB,
+                       "Use of unregistered type library '%s'\n", library,
+                       NULL);
+            def->data = NULL;
+        } else {
+            def->data = lib;
+            if (lib->have == NULL) {
+                xmlRngPErr(ctxt, node, XML_RNGP_ERROR_TYPE_LIB,
+                           "Internal error with type library '%s': no 'have'\n",
+                           library, NULL);
+            } else {
+                success = lib->have(lib->data, def->name);
+                if (success != 1) {
+                    xmlRngPErr(ctxt, node, XML_RNGP_TYPE_NOT_FOUND,
+                               "Error type '%s' is not exported by type library '%s'\n",
+                               def->name, library);
+                }
+            }
+        }
+    }
+    if (node->children == NULL) {
+        def->value = xmlStrdup(BAD_CAST "");
+    } else if (((node->children->type != XML_TEXT_NODE) &&
+                (node->children->type != XML_CDATA_SECTION_NODE)) ||
+               (node->children->next != NULL)) {
+        xmlRngPErr(ctxt, node, XML_RNGP_TEXT_EXPECTED,
+                   "Expecting a single text value for <value>content\n",
+                   NULL, NULL);
+    } else if (def != NULL) {
+        def->value = xmlNodeGetContent(node);
+        if (def->value == NULL) {
+            xmlRngPErr(ctxt, node, XML_RNGP_VALUE_NO_CONTENT,
+                       "Element <value> has no content\n", NULL, NULL);
+        } else if ((lib != NULL) && (lib->check != NULL) && (success == 1)) {
+            void *val = NULL;
+
+            success =
+                lib->check(lib->data, def->name, def->value, &val, node);
+            if (success != 1) {
+                xmlRngPErr(ctxt, node, XML_RNGP_INVALID_VALUE,
+                           "Value '%s' is not acceptable for type '%s'\n",
+                           def->value, def->name);
+            } else {
+                if (val != NULL)
+                    def->attrs = val;
+            }
+        }
+    }
+    return (def);
+}
+
+/**
+ * xmlRelaxNGParseData:
+ * @ctxt:  a Relax-NG parser context
+ * @node:  the data node.
+ *
+ * parse the content of a RelaxNG data node.
+ *
+ * Returns the definition pointer or NULL in case of error
+ */
+static xmlRelaxNGDefinePtr
+xmlRelaxNGParseData(xmlRelaxNGParserCtxtPtr ctxt, xmlNodePtr node)
+{
+    xmlRelaxNGDefinePtr def = NULL, except;
+    xmlRelaxNGDefinePtr param, lastparam = NULL;
+    xmlRelaxNGTypeLibraryPtr lib;
+    xmlChar *type;
+    xmlChar *library;
+    xmlNodePtr content;
+    int tmp;
+
+    type = xmlGetProp(node, BAD_CAST "type");
+    if (type == NULL) {
+        xmlRngPErr(ctxt, node, XML_RNGP_TYPE_MISSING, "data has no type\n", NULL,
+                   NULL);
+        return (NULL);
+    }
+    xmlRelaxNGNormExtSpace(type);
+    if (xmlValidateNCName(type, 0)) {
+        xmlRngPErr(ctxt, node, XML_RNGP_TYPE_VALUE,
+                   "data type '%s' is not an NCName\n", type, NULL);
+    }
+    library = xmlRelaxNGGetDataTypeLibrary(ctxt, node);
+    if (library == NULL)
+        library =
+            xmlStrdup(BAD_CAST "http://relaxng.org/ns/structure/1.0");
+
+    def = xmlRelaxNGNewDefine(ctxt, node);
+    if (def == NULL) {
+        xmlFree(type);
+        return (NULL);
+    }
+    def->type = XML_RELAXNG_DATATYPE;
+    def->name = type;
+    def->ns = library;
+
+    lib = (xmlRelaxNGTypeLibraryPtr)
+        xmlHashLookup(xmlRelaxNGRegisteredTypes, library);
+    if (lib == NULL) {
+        xmlRngPErr(ctxt, node, XML_RNGP_UNKNOWN_TYPE_LIB,
+                   "Use of unregistered type library '%s'\n", library,
+                   NULL);
+        def->data = NULL;
+    } else {
+        def->data = lib;
+        if (lib->have == NULL) {
+            xmlRngPErr(ctxt, node, XML_RNGP_ERROR_TYPE_LIB,
+                       "Internal error with type library '%s': no 'have'\n",
+                       library, NULL);
+        } else {
+            tmp = lib->have(lib->data, def->name);
+            if (tmp != 1) {
+                xmlRngPErr(ctxt, node, XML_RNGP_TYPE_NOT_FOUND,
+                           "Error type '%s' is not exported by type library '%s'\n",
+                           def->name, library);
+            } else
+                if ((xmlStrEqual
+                     (library,
+                      BAD_CAST
+                      "http://www.w3.org/2001/XMLSchema-datatypes"))
+                    && ((xmlStrEqual(def->name, BAD_CAST "IDREF"))
+                        || (xmlStrEqual(def->name, BAD_CAST "IDREFS")))) {
+                ctxt->idref = 1;
+            }
+        }
+    }
+    content = node->children;
+
+    /*
+     * Handle optional params
+     */
+    while (content != NULL) {
+        if (!xmlStrEqual(content->name, BAD_CAST "param"))
+            break;
+        if (xmlStrEqual(library,
+                        BAD_CAST "http://relaxng.org/ns/structure/1.0")) {
+            xmlRngPErr(ctxt, node, XML_RNGP_PARAM_FORBIDDEN,
+                       "Type library '%s' does not allow type parameters\n",
+                       library, NULL);
+            content = content->next;
+            while ((content != NULL) &&
+                   (xmlStrEqual(content->name, BAD_CAST "param")))
+                content = content->next;
+        } else {
+            param = xmlRelaxNGNewDefine(ctxt, node);
+            if (param != NULL) {
+                param->type = XML_RELAXNG_PARAM;
+                param->name = xmlGetProp(content, BAD_CAST "name");
+                if (param->name == NULL) {
+                    xmlRngPErr(ctxt, node, XML_RNGP_PARAM_NAME_MISSING,
+                               "param has no name\n", NULL, NULL);
+                }
+                param->value = xmlNodeGetContent(content);
+                if (lastparam == NULL) {
+                    def->attrs = lastparam = param;
+                } else {
+                    lastparam->next = param;
+                    lastparam = param;
+                }
+                if (lib != NULL) {
+                }
+            }
+            content = content->next;
+        }
+    }
+    /*
+     * Handle optional except
+     */
+    if ((content != NULL)
+        && (xmlStrEqual(content->name, BAD_CAST "except"))) {
+        xmlNodePtr child;
+        xmlRelaxNGDefinePtr tmp2, last = NULL;
+
+        except = xmlRelaxNGNewDefine(ctxt, node);
+        if (except == NULL) {
+            return (def);
+        }
+        except->type = XML_RELAXNG_EXCEPT;
+        child = content->children;
+	def->content = except;
+        if (child == NULL) {
+            xmlRngPErr(ctxt, content, XML_RNGP_EXCEPT_NO_CONTENT,
+                       "except has no content\n", NULL, NULL);
+        }
+        while (child != NULL) {
+            tmp2 = xmlRelaxNGParsePattern(ctxt, child);
+            if (tmp2 != NULL) {
+                if (last == NULL) {
+                    except->content = last = tmp2;
+                } else {
+                    last->next = tmp2;
+                    last = tmp2;
+                }
+            }
+            child = child->next;
+        }
+        content = content->next;
+    }
+    /*
+     * Check there is no unhandled data
+     */
+    if (content != NULL) {
+        xmlRngPErr(ctxt, content, XML_RNGP_DATA_CONTENT,
+                   "Element data has unexpected content %s\n",
+                   content->name, NULL);
+    }
+
+    return (def);
+}
+
+static const xmlChar *invalidName = BAD_CAST "\1";
+
+/**
+ * xmlRelaxNGCompareNameClasses:
+ * @defs1:  the first element/attribute defs
+ * @defs2:  the second element/attribute defs
+ * @name:  the restriction on the name
+ * @ns:  the restriction on the namespace
+ *
+ * Compare the 2 lists of element definitions. The comparison is
+ * that if both lists do not accept the same QNames, it returns 1
+ * If the 2 lists can accept the same QName the comparison returns 0
+ *
+ * Returns 1 disttinct, 0 if equal
+ */
+static int
+xmlRelaxNGCompareNameClasses(xmlRelaxNGDefinePtr def1,
+                             xmlRelaxNGDefinePtr def2)
+{
+    int ret = 1;
+    xmlNode node;
+    xmlNs ns;
+    xmlRelaxNGValidCtxt ctxt;
+
+    memset(&ctxt, 0, sizeof(xmlRelaxNGValidCtxt));
+
+    ctxt.flags = FLAGS_IGNORABLE | FLAGS_NOERROR;
+
+    if ((def1->type == XML_RELAXNG_ELEMENT) ||
+        (def1->type == XML_RELAXNG_ATTRIBUTE)) {
+        if (def2->type == XML_RELAXNG_TEXT)
+            return (1);
+        if (def1->name != NULL) {
+            node.name = def1->name;
+        } else {
+            node.name = invalidName;
+        }
+        if (def1->ns != NULL) {
+            if (def1->ns[0] == 0) {
+                node.ns = NULL;
+            } else {
+	        node.ns = &ns;
+                ns.href = def1->ns;
+            }
+        } else {
+            node.ns = NULL;
+        }
+        if (xmlRelaxNGElementMatch(&ctxt, def2, &node)) {
+            if (def1->nameClass != NULL) {
+                ret = xmlRelaxNGCompareNameClasses(def1->nameClass, def2);
+            } else {
+                ret = 0;
+            }
+        } else {
+            ret = 1;
+        }
+    } else if (def1->type == XML_RELAXNG_TEXT) {
+        if (def2->type == XML_RELAXNG_TEXT)
+            return (0);
+        return (1);
+    } else if (def1->type == XML_RELAXNG_EXCEPT) {
+        ret = xmlRelaxNGCompareNameClasses(def1->content, def2);
+	if (ret == 0)
+	    ret = 1;
+	else if (ret == 1)
+	    ret = 0;
+    } else {
+        TODO ret = 0;
+    }
+    if (ret == 0)
+        return (ret);
+    if ((def2->type == XML_RELAXNG_ELEMENT) ||
+        (def2->type == XML_RELAXNG_ATTRIBUTE)) {
+        if (def2->name != NULL) {
+            node.name = def2->name;
+        } else {
+            node.name = invalidName;
+        }
+        node.ns = &ns;
+        if (def2->ns != NULL) {
+            if (def2->ns[0] == 0) {
+                node.ns = NULL;
+            } else {
+                ns.href = def2->ns;
+            }
+        } else {
+            ns.href = invalidName;
+        }
+        if (xmlRelaxNGElementMatch(&ctxt, def1, &node)) {
+            if (def2->nameClass != NULL) {
+                ret = xmlRelaxNGCompareNameClasses(def2->nameClass, def1);
+            } else {
+                ret = 0;
+            }
+        } else {
+            ret = 1;
+        }
+    } else {
+        TODO ret = 0;
+    }
+
+    return (ret);
+}
+
+/**
+ * xmlRelaxNGCompareElemDefLists:
+ * @ctxt:  a Relax-NG parser context
+ * @defs1:  the first list of element/attribute defs
+ * @defs2:  the second list of element/attribute defs
+ *
+ * Compare the 2 lists of element or attribute definitions. The comparison
+ * is that if both lists do not accept the same QNames, it returns 1
+ * If the 2 lists can accept the same QName the comparison returns 0
+ *
+ * Returns 1 disttinct, 0 if equal
+ */
+static int
+xmlRelaxNGCompareElemDefLists(xmlRelaxNGParserCtxtPtr ctxt
+                              ATTRIBUTE_UNUSED, xmlRelaxNGDefinePtr * def1,
+                              xmlRelaxNGDefinePtr * def2)
+{
+    xmlRelaxNGDefinePtr *basedef2 = def2;
+
+    if ((def1 == NULL) || (def2 == NULL))
+        return (1);
+    if ((*def1 == NULL) || (*def2 == NULL))
+        return (1);
+    while (*def1 != NULL) {
+        while ((*def2) != NULL) {
+            if (xmlRelaxNGCompareNameClasses(*def1, *def2) == 0)
+                return (0);
+            def2++;
+        }
+        def2 = basedef2;
+        def1++;
+    }
+    return (1);
+}
+
+/**
+ * xmlRelaxNGGenerateAttributes:
+ * @ctxt:  a Relax-NG parser context
+ * @def:  the definition definition
+ *
+ * Check if the definition can only generate attributes
+ *
+ * Returns 1 if yes, 0 if no and -1 in case of error.
+ */
+static int
+xmlRelaxNGGenerateAttributes(xmlRelaxNGParserCtxtPtr ctxt,
+                             xmlRelaxNGDefinePtr def)
+{
+    xmlRelaxNGDefinePtr parent, cur, tmp;
+
+    /*
+     * Don't run that check in case of error. Infinite recursion
+     * becomes possible.
+     */
+    if (ctxt->nbErrors != 0)
+        return (-1);
+
+    parent = NULL;
+    cur = def;
+    while (cur != NULL) {
+        if ((cur->type == XML_RELAXNG_ELEMENT) ||
+            (cur->type == XML_RELAXNG_TEXT) ||
+            (cur->type == XML_RELAXNG_DATATYPE) ||
+            (cur->type == XML_RELAXNG_PARAM) ||
+            (cur->type == XML_RELAXNG_LIST) ||
+            (cur->type == XML_RELAXNG_VALUE) ||
+            (cur->type == XML_RELAXNG_EMPTY))
+            return (0);
+        if ((cur->type == XML_RELAXNG_CHOICE) ||
+            (cur->type == XML_RELAXNG_INTERLEAVE) ||
+            (cur->type == XML_RELAXNG_GROUP) ||
+            (cur->type == XML_RELAXNG_ONEORMORE) ||
+            (cur->type == XML_RELAXNG_ZEROORMORE) ||
+            (cur->type == XML_RELAXNG_OPTIONAL) ||
+            (cur->type == XML_RELAXNG_PARENTREF) ||
+            (cur->type == XML_RELAXNG_EXTERNALREF) ||
+            (cur->type == XML_RELAXNG_REF) ||
+            (cur->type == XML_RELAXNG_DEF)) {
+            if (cur->content != NULL) {
+                parent = cur;
+                cur = cur->content;
+                tmp = cur;
+                while (tmp != NULL) {
+                    tmp->parent = parent;
+                    tmp = tmp->next;
+                }
+                continue;
+            }
+        }
+        if (cur == def)
+            break;
+        if (cur->next != NULL) {
+            cur = cur->next;
+            continue;
+        }
+        do {
+            cur = cur->parent;
+            if (cur == NULL)
+                break;
+            if (cur == def)
+                return (1);
+            if (cur->next != NULL) {
+                cur = cur->next;
+                break;
+            }
+        } while (cur != NULL);
+    }
+    return (1);
+}
+
+/**
+ * xmlRelaxNGGetElements:
+ * @ctxt:  a Relax-NG parser context
+ * @def:  the definition definition
+ * @eora:  gather elements (0) or attributes (1)
+ *
+ * Compute the list of top elements a definition can generate
+ *
+ * Returns a list of elements or NULL if none was found.
+ */
+static xmlRelaxNGDefinePtr *
+xmlRelaxNGGetElements(xmlRelaxNGParserCtxtPtr ctxt,
+                      xmlRelaxNGDefinePtr def, int eora)
+{
+    xmlRelaxNGDefinePtr *ret = NULL, parent, cur, tmp;
+    int len = 0;
+    int max = 0;
+
+    /*
+     * Don't run that check in case of error. Infinite recursion
+     * becomes possible.
+     */
+    if (ctxt->nbErrors != 0)
+        return (NULL);
+
+    parent = NULL;
+    cur = def;
+    while (cur != NULL) {
+        if (((eora == 0) && ((cur->type == XML_RELAXNG_ELEMENT) ||
+                             (cur->type == XML_RELAXNG_TEXT))) ||
+            ((eora == 1) && (cur->type == XML_RELAXNG_ATTRIBUTE))) {
+            if (ret == NULL) {
+                max = 10;
+                ret = (xmlRelaxNGDefinePtr *)
+                    xmlMalloc((max + 1) * sizeof(xmlRelaxNGDefinePtr));
+                if (ret == NULL) {
+                    xmlRngPErrMemory(ctxt, "getting element list\n");
+                    return (NULL);
+                }
+            } else if (max <= len) {
+	        xmlRelaxNGDefinePtr *temp;
+
+                max *= 2;
+                temp = xmlRealloc(ret,
+                               (max + 1) * sizeof(xmlRelaxNGDefinePtr));
+                if (temp == NULL) {
+                    xmlRngPErrMemory(ctxt, "getting element list\n");
+		    xmlFree(ret);
+                    return (NULL);
+                }
+		ret = temp;
+            }
+            ret[len++] = cur;
+            ret[len] = NULL;
+        } else if ((cur->type == XML_RELAXNG_CHOICE) ||
+                   (cur->type == XML_RELAXNG_INTERLEAVE) ||
+                   (cur->type == XML_RELAXNG_GROUP) ||
+                   (cur->type == XML_RELAXNG_ONEORMORE) ||
+                   (cur->type == XML_RELAXNG_ZEROORMORE) ||
+                   (cur->type == XML_RELAXNG_OPTIONAL) ||
+                   (cur->type == XML_RELAXNG_PARENTREF) ||
+                   (cur->type == XML_RELAXNG_REF) ||
+                   (cur->type == XML_RELAXNG_DEF) ||
+		   (cur->type == XML_RELAXNG_EXTERNALREF)) {
+            /*
+             * Don't go within elements or attributes or string values.
+             * Just gather the element top list
+             */
+            if (cur->content != NULL) {
+                parent = cur;
+                cur = cur->content;
+                tmp = cur;
+                while (tmp != NULL) {
+                    tmp->parent = parent;
+                    tmp = tmp->next;
+                }
+                continue;
+            }
+        }
+        if (cur == def)
+            break;
+        if (cur->next != NULL) {
+            cur = cur->next;
+            continue;
+        }
+        do {
+            cur = cur->parent;
+            if (cur == NULL)
+                break;
+            if (cur == def)
+                return (ret);
+            if (cur->next != NULL) {
+                cur = cur->next;
+                break;
+            }
+        } while (cur != NULL);
+    }
+    return (ret);
+}
+
+/**
+ * xmlRelaxNGCheckChoiceDeterminism:
+ * @ctxt:  a Relax-NG parser context
+ * @def:  the choice definition
+ *
+ * Also used to find indeterministic pattern in choice
+ */
+static void
+xmlRelaxNGCheckChoiceDeterminism(xmlRelaxNGParserCtxtPtr ctxt,
+                                 xmlRelaxNGDefinePtr def)
+{
+    xmlRelaxNGDefinePtr **list;
+    xmlRelaxNGDefinePtr cur;
+    int nbchild = 0, i, j, ret;
+    int is_nullable = 0;
+    int is_indeterminist = 0;
+    xmlHashTablePtr triage = NULL;
+    int is_triable = 1;
+
+    if ((def == NULL) || (def->type != XML_RELAXNG_CHOICE))
+        return;
+
+    if (def->dflags & IS_PROCESSED)
+        return;
+
+    /*
+     * Don't run that check in case of error. Infinite recursion
+     * becomes possible.
+     */
+    if (ctxt->nbErrors != 0)
+        return;
+
+    is_nullable = xmlRelaxNGIsNullable(def);
+
+    cur = def->content;
+    while (cur != NULL) {
+        nbchild++;
+        cur = cur->next;
+    }
+
+    list = (xmlRelaxNGDefinePtr **) xmlMalloc(nbchild *
+                                              sizeof(xmlRelaxNGDefinePtr
+                                                     *));
+    if (list == NULL) {
+        xmlRngPErrMemory(ctxt, "building choice\n");
+        return;
+    }
+    i = 0;
+    /*
+     * a bit strong but safe
+     */
+    if (is_nullable == 0) {
+        triage = xmlHashCreate(10);
+    } else {
+        is_triable = 0;
+    }
+    cur = def->content;
+    while (cur != NULL) {
+        list[i] = xmlRelaxNGGetElements(ctxt, cur, 0);
+        if ((list[i] == NULL) || (list[i][0] == NULL)) {
+            is_triable = 0;
+        } else if (is_triable == 1) {
+            xmlRelaxNGDefinePtr *tmp;
+            int res;
+
+            tmp = list[i];
+            while ((*tmp != NULL) && (is_triable == 1)) {
+                if ((*tmp)->type == XML_RELAXNG_TEXT) {
+                    res = xmlHashAddEntry2(triage,
+                                           BAD_CAST "#text", NULL,
+                                           (void *) cur);
+                    if (res != 0)
+                        is_triable = -1;
+                } else if (((*tmp)->type == XML_RELAXNG_ELEMENT) &&
+                           ((*tmp)->name != NULL)) {
+                    if (((*tmp)->ns == NULL) || ((*tmp)->ns[0] == 0))
+                        res = xmlHashAddEntry2(triage,
+                                               (*tmp)->name, NULL,
+                                               (void *) cur);
+                    else
+                        res = xmlHashAddEntry2(triage,
+                                               (*tmp)->name, (*tmp)->ns,
+                                               (void *) cur);
+                    if (res != 0)
+                        is_triable = -1;
+                } else if ((*tmp)->type == XML_RELAXNG_ELEMENT) {
+                    if (((*tmp)->ns == NULL) || ((*tmp)->ns[0] == 0))
+                        res = xmlHashAddEntry2(triage,
+                                               BAD_CAST "#any", NULL,
+                                               (void *) cur);
+                    else
+                        res = xmlHashAddEntry2(triage,
+                                               BAD_CAST "#any", (*tmp)->ns,
+                                               (void *) cur);
+                    if (res != 0)
+                        is_triable = -1;
+                } else {
+                    is_triable = -1;
+                }
+                tmp++;
+            }
+        }
+        i++;
+        cur = cur->next;
+    }
+
+    for (i = 0; i < nbchild; i++) {
+        if (list[i] == NULL)
+            continue;
+        for (j = 0; j < i; j++) {
+            if (list[j] == NULL)
+                continue;
+            ret = xmlRelaxNGCompareElemDefLists(ctxt, list[i], list[j]);
+            if (ret == 0) {
+                is_indeterminist = 1;
+            }
+        }
+    }
+    for (i = 0; i < nbchild; i++) {
+        if (list[i] != NULL)
+            xmlFree(list[i]);
+    }
+
+    xmlFree(list);
+    if (is_indeterminist) {
+        def->dflags |= IS_INDETERMINIST;
+    }
+    if (is_triable == 1) {
+        def->dflags |= IS_TRIABLE;
+        def->data = triage;
+    } else if (triage != NULL) {
+        xmlHashFree(triage, NULL);
+    }
+    def->dflags |= IS_PROCESSED;
+}
+
+/**
+ * xmlRelaxNGCheckGroupAttrs:
+ * @ctxt:  a Relax-NG parser context
+ * @def:  the group definition
+ *
+ * Detects violations of rule 7.3
+ */
+static void
+xmlRelaxNGCheckGroupAttrs(xmlRelaxNGParserCtxtPtr ctxt,
+                          xmlRelaxNGDefinePtr def)
+{
+    xmlRelaxNGDefinePtr **list;
+    xmlRelaxNGDefinePtr cur;
+    int nbchild = 0, i, j, ret;
+
+    if ((def == NULL) ||
+        ((def->type != XML_RELAXNG_GROUP) &&
+         (def->type != XML_RELAXNG_ELEMENT)))
+        return;
+
+    if (def->dflags & IS_PROCESSED)
+        return;
+
+    /*
+     * Don't run that check in case of error. Infinite recursion
+     * becomes possible.
+     */
+    if (ctxt->nbErrors != 0)
+        return;
+
+    cur = def->attrs;
+    while (cur != NULL) {
+        nbchild++;
+        cur = cur->next;
+    }
+    cur = def->content;
+    while (cur != NULL) {
+        nbchild++;
+        cur = cur->next;
+    }
+
+    list = (xmlRelaxNGDefinePtr **) xmlMalloc(nbchild *
+                                              sizeof(xmlRelaxNGDefinePtr
+                                                     *));
+    if (list == NULL) {
+        xmlRngPErrMemory(ctxt, "building group\n");
+        return;
+    }
+    i = 0;
+    cur = def->attrs;
+    while (cur != NULL) {
+        list[i] = xmlRelaxNGGetElements(ctxt, cur, 1);
+        i++;
+        cur = cur->next;
+    }
+    cur = def->content;
+    while (cur != NULL) {
+        list[i] = xmlRelaxNGGetElements(ctxt, cur, 1);
+        i++;
+        cur = cur->next;
+    }
+
+    for (i = 0; i < nbchild; i++) {
+        if (list[i] == NULL)
+            continue;
+        for (j = 0; j < i; j++) {
+            if (list[j] == NULL)
+                continue;
+            ret = xmlRelaxNGCompareElemDefLists(ctxt, list[i], list[j]);
+            if (ret == 0) {
+                xmlRngPErr(ctxt, def->node, XML_RNGP_GROUP_ATTR_CONFLICT,
+                           "Attributes conflicts in group\n", NULL, NULL);
+            }
+        }
+    }
+    for (i = 0; i < nbchild; i++) {
+        if (list[i] != NULL)
+            xmlFree(list[i]);
+    }
+
+    xmlFree(list);
+    def->dflags |= IS_PROCESSED;
+}
+
+/**
+ * xmlRelaxNGComputeInterleaves:
+ * @def:  the interleave definition
+ * @ctxt:  a Relax-NG parser context
+ * @name:  the definition name
+ *
+ * A lot of work for preprocessing interleave definitions
+ * is potentially needed to get a decent execution speed at runtime
+ *   - trying to get a total order on the element nodes generated
+ *     by the interleaves, order the list of interleave definitions
+ *     following that order.
+ *   - if <text/> is used to handle mixed content, it is better to
+ *     flag this in the define and simplify the runtime checking
+ *     algorithm
+ */
+static void
+xmlRelaxNGComputeInterleaves(xmlRelaxNGDefinePtr def,
+                             xmlRelaxNGParserCtxtPtr ctxt,
+                             xmlChar * name ATTRIBUTE_UNUSED)
+{
+    xmlRelaxNGDefinePtr cur, *tmp;
+
+    xmlRelaxNGPartitionPtr partitions = NULL;
+    xmlRelaxNGInterleaveGroupPtr *groups = NULL;
+    xmlRelaxNGInterleaveGroupPtr group;
+    int i, j, ret, res;
+    int nbgroups = 0;
+    int nbchild = 0;
+    int is_mixed = 0;
+    int is_determinist = 1;
+
+    /*
+     * Don't run that check in case of error. Infinite recursion
+     * becomes possible.
+     */
+    if (ctxt->nbErrors != 0)
+        return;
+
+#ifdef DEBUG_INTERLEAVE
+    xmlGenericError(xmlGenericErrorContext,
+                    "xmlRelaxNGComputeInterleaves(%s)\n", name);
+#endif
+    cur = def->content;
+    while (cur != NULL) {
+        nbchild++;
+        cur = cur->next;
+    }
+
+#ifdef DEBUG_INTERLEAVE
+    xmlGenericError(xmlGenericErrorContext, "  %d child\n", nbchild);
+#endif
+    groups = (xmlRelaxNGInterleaveGroupPtr *)
+        xmlMalloc(nbchild * sizeof(xmlRelaxNGInterleaveGroupPtr));
+    if (groups == NULL)
+        goto error;
+    cur = def->content;
+    while (cur != NULL) {
+        groups[nbgroups] = (xmlRelaxNGInterleaveGroupPtr)
+            xmlMalloc(sizeof(xmlRelaxNGInterleaveGroup));
+        if (groups[nbgroups] == NULL)
+            goto error;
+        if (cur->type == XML_RELAXNG_TEXT)
+            is_mixed++;
+        groups[nbgroups]->rule = cur;
+        groups[nbgroups]->defs = xmlRelaxNGGetElements(ctxt, cur, 0);
+        groups[nbgroups]->attrs = xmlRelaxNGGetElements(ctxt, cur, 1);
+        nbgroups++;
+        cur = cur->next;
+    }
+#ifdef DEBUG_INTERLEAVE
+    xmlGenericError(xmlGenericErrorContext, "  %d groups\n", nbgroups);
+#endif
+
+    /*
+     * Let's check that all rules makes a partitions according to 7.4
+     */
+    partitions = (xmlRelaxNGPartitionPtr)
+        xmlMalloc(sizeof(xmlRelaxNGPartition));
+    if (partitions == NULL)
+        goto error;
+    memset(partitions, 0, sizeof(xmlRelaxNGPartition));
+    partitions->nbgroups = nbgroups;
+    partitions->triage = xmlHashCreate(nbgroups);
+    for (i = 0; i < nbgroups; i++) {
+        group = groups[i];
+        for (j = i + 1; j < nbgroups; j++) {
+            if (groups[j] == NULL)
+                continue;
+
+            ret = xmlRelaxNGCompareElemDefLists(ctxt, group->defs,
+                                                groups[j]->defs);
+            if (ret == 0) {
+                xmlRngPErr(ctxt, def->node, XML_RNGP_ELEM_TEXT_CONFLICT,
+                           "Element or text conflicts in interleave\n",
+                           NULL, NULL);
+            }
+            ret = xmlRelaxNGCompareElemDefLists(ctxt, group->attrs,
+                                                groups[j]->attrs);
+            if (ret == 0) {
+                xmlRngPErr(ctxt, def->node, XML_RNGP_ATTR_CONFLICT,
+                           "Attributes conflicts in interleave\n", NULL,
+                           NULL);
+            }
+        }
+        tmp = group->defs;
+        if ((tmp != NULL) && (*tmp != NULL)) {
+            while (*tmp != NULL) {
+                if ((*tmp)->type == XML_RELAXNG_TEXT) {
+                    res = xmlHashAddEntry2(partitions->triage,
+                                           BAD_CAST "#text", NULL,
+                                           (void *) (long) (i + 1));
+                    if (res != 0)
+                        is_determinist = -1;
+                } else if (((*tmp)->type == XML_RELAXNG_ELEMENT) &&
+                           ((*tmp)->name != NULL)) {
+                    if (((*tmp)->ns == NULL) || ((*tmp)->ns[0] == 0))
+                        res = xmlHashAddEntry2(partitions->triage,
+                                               (*tmp)->name, NULL,
+                                               (void *) (long) (i + 1));
+                    else
+                        res = xmlHashAddEntry2(partitions->triage,
+                                               (*tmp)->name, (*tmp)->ns,
+                                               (void *) (long) (i + 1));
+                    if (res != 0)
+                        is_determinist = -1;
+                } else if ((*tmp)->type == XML_RELAXNG_ELEMENT) {
+                    if (((*tmp)->ns == NULL) || ((*tmp)->ns[0] == 0))
+                        res = xmlHashAddEntry2(partitions->triage,
+                                               BAD_CAST "#any", NULL,
+                                               (void *) (long) (i + 1));
+                    else
+                        res = xmlHashAddEntry2(partitions->triage,
+                                               BAD_CAST "#any", (*tmp)->ns,
+                                               (void *) (long) (i + 1));
+                    if ((*tmp)->nameClass != NULL)
+                        is_determinist = 2;
+                    if (res != 0)
+                        is_determinist = -1;
+                } else {
+                    is_determinist = -1;
+                }
+                tmp++;
+            }
+        } else {
+            is_determinist = 0;
+        }
+    }
+    partitions->groups = groups;
+
+    /*
+     * and save the partition list back in the def
+     */
+    def->data = partitions;
+    if (is_mixed != 0)
+        def->dflags |= IS_MIXED;
+    if (is_determinist == 1)
+        partitions->flags = IS_DETERMINIST;
+    if (is_determinist == 2)
+        partitions->flags = IS_DETERMINIST | IS_NEEDCHECK;
+    return;
+
+  error:
+    xmlRngPErrMemory(ctxt, "in interleave computation\n");
+    if (groups != NULL) {
+        for (i = 0; i < nbgroups; i++)
+            if (groups[i] != NULL) {
+                if (groups[i]->defs != NULL)
+                    xmlFree(groups[i]->defs);
+                xmlFree(groups[i]);
+            }
+        xmlFree(groups);
+    }
+    xmlRelaxNGFreePartition(partitions);
+}
+
+/**
+ * xmlRelaxNGParseInterleave:
+ * @ctxt:  a Relax-NG parser context
+ * @node:  the data node.
+ *
+ * parse the content of a RelaxNG interleave node.
+ *
+ * Returns the definition pointer or NULL in case of error
+ */
+static xmlRelaxNGDefinePtr
+xmlRelaxNGParseInterleave(xmlRelaxNGParserCtxtPtr ctxt, xmlNodePtr node)
+{
+    xmlRelaxNGDefinePtr def = NULL;
+    xmlRelaxNGDefinePtr last = NULL, cur;
+    xmlNodePtr child;
+
+    def = xmlRelaxNGNewDefine(ctxt, node);
+    if (def == NULL) {
+        return (NULL);
+    }
+    def->type = XML_RELAXNG_INTERLEAVE;
+
+    if (ctxt->interleaves == NULL)
+        ctxt->interleaves = xmlHashCreate(10);
+    if (ctxt->interleaves == NULL) {
+        xmlRngPErrMemory(ctxt, "create interleaves\n");
+    } else {
+        char name[32];
+
+        snprintf(name, 32, "interleave%d", ctxt->nbInterleaves++);
+        if (xmlHashAddEntry(ctxt->interleaves, BAD_CAST name, def) < 0) {
+            xmlRngPErr(ctxt, node, XML_RNGP_INTERLEAVE_ADD,
+                       "Failed to add %s to hash table\n",
+		       (const xmlChar *) name, NULL);
+        }
+    }
+    child = node->children;
+    if (child == NULL) {
+        xmlRngPErr(ctxt, node, XML_RNGP_INTERLEAVE_NO_CONTENT,
+                   "Element interleave is empty\n", NULL, NULL);
+    }
+    while (child != NULL) {
+        if (IS_RELAXNG(child, "element")) {
+            cur = xmlRelaxNGParseElement(ctxt, child);
+        } else {
+            cur = xmlRelaxNGParsePattern(ctxt, child);
+        }
+        if (cur != NULL) {
+            cur->parent = def;
+            if (last == NULL) {
+                def->content = last = cur;
+            } else {
+                last->next = cur;
+                last = cur;
+            }
+        }
+        child = child->next;
+    }
+
+    return (def);
+}
+
+/**
+ * xmlRelaxNGParseInclude:
+ * @ctxt:  a Relax-NG parser context
+ * @node:  the include node
+ *
+ * Integrate the content of an include node in the current grammar
+ *
+ * Returns 0 in case of success or -1 in case of error
+ */
+static int
+xmlRelaxNGParseInclude(xmlRelaxNGParserCtxtPtr ctxt, xmlNodePtr node)
+{
+    xmlRelaxNGIncludePtr incl;
+    xmlNodePtr root;
+    int ret = 0, tmp;
+
+    incl = node->psvi;
+    if (incl == NULL) {
+        xmlRngPErr(ctxt, node, XML_RNGP_INCLUDE_EMPTY,
+                   "Include node has no data\n", NULL, NULL);
+        return (-1);
+    }
+    root = xmlDocGetRootElement(incl->doc);
+    if (root == NULL) {
+        xmlRngPErr(ctxt, node, XML_RNGP_EMPTY, "Include document is empty\n",
+                   NULL, NULL);
+        return (-1);
+    }
+    if (!xmlStrEqual(root->name, BAD_CAST "grammar")) {
+        xmlRngPErr(ctxt, node, XML_RNGP_GRAMMAR_MISSING,
+                   "Include document root is not a grammar\n", NULL, NULL);
+        return (-1);
+    }
+
+    /*
+     * Merge the definition from both the include and the internal list
+     */
+    if (root->children != NULL) {
+        tmp = xmlRelaxNGParseGrammarContent(ctxt, root->children);
+        if (tmp != 0)
+            ret = -1;
+    }
+    if (node->children != NULL) {
+        tmp = xmlRelaxNGParseGrammarContent(ctxt, node->children);
+        if (tmp != 0)
+            ret = -1;
+    }
+    return (ret);
+}
+
+/**
+ * xmlRelaxNGParseDefine:
+ * @ctxt:  a Relax-NG parser context
+ * @node:  the define node
+ *
+ * parse the content of a RelaxNG define element node.
+ *
+ * Returns 0 in case of success or -1 in case of error
+ */
+static int
+xmlRelaxNGParseDefine(xmlRelaxNGParserCtxtPtr ctxt, xmlNodePtr node)
+{
+    xmlChar *name;
+    int ret = 0, tmp;
+    xmlRelaxNGDefinePtr def;
+    const xmlChar *olddefine;
+
+    name = xmlGetProp(node, BAD_CAST "name");
+    if (name == NULL) {
+        xmlRngPErr(ctxt, node, XML_RNGP_DEFINE_NAME_MISSING,
+                   "define has no name\n", NULL, NULL);
+    } else {
+        xmlRelaxNGNormExtSpace(name);
+        if (xmlValidateNCName(name, 0)) {
+            xmlRngPErr(ctxt, node, XML_RNGP_INVALID_DEFINE_NAME,
+                       "define name '%s' is not an NCName\n", name, NULL);
+        }
+        def = xmlRelaxNGNewDefine(ctxt, node);
+        if (def == NULL) {
+            xmlFree(name);
+            return (-1);
+        }
+        def->type = XML_RELAXNG_DEF;
+        def->name = name;
+        if (node->children == NULL) {
+            xmlRngPErr(ctxt, node, XML_RNGP_DEFINE_EMPTY,
+                       "define has no children\n", NULL, NULL);
+        } else {
+            olddefine = ctxt->define;
+            ctxt->define = name;
+            def->content =
+                xmlRelaxNGParsePatterns(ctxt, node->children, 0);
+            ctxt->define = olddefine;
+        }
+        if (ctxt->grammar->defs == NULL)
+            ctxt->grammar->defs = xmlHashCreate(10);
+        if (ctxt->grammar->defs == NULL) {
+            xmlRngPErr(ctxt, node, XML_RNGP_DEFINE_CREATE_FAILED,
+                       "Could not create definition hash\n", NULL, NULL);
+            ret = -1;
+        } else {
+            tmp = xmlHashAddEntry(ctxt->grammar->defs, name, def);
+            if (tmp < 0) {
+                xmlRelaxNGDefinePtr prev;
+
+                prev = xmlHashLookup(ctxt->grammar->defs, name);
+                if (prev == NULL) {
+                    xmlRngPErr(ctxt, node, XML_RNGP_DEFINE_CREATE_FAILED,
+                               "Internal error on define aggregation of %s\n",
+                               name, NULL);
+                    ret = -1;
+                } else {
+                    while (prev->nextHash != NULL)
+                        prev = prev->nextHash;
+                    prev->nextHash = def;
+                }
+            }
+        }
+    }
+    return (ret);
+}
+
+/**
+ * xmlRelaxNGParseImportRef:
+ * @payload: the parser context
+ * @data: the current grammar
+ * @name: the reference name
+ *
+ * Import import one references into the current grammar
+ */
+static void
+xmlRelaxNGParseImportRef(void *payload, void *data, xmlChar *name) {
+    xmlRelaxNGParserCtxtPtr ctxt = (xmlRelaxNGParserCtxtPtr) data;
+    xmlRelaxNGDefinePtr def = (xmlRelaxNGDefinePtr) payload;
+    int tmp;
+
+    def->dflags |= IS_EXTERNAL_REF;
+
+    tmp = xmlHashAddEntry(ctxt->grammar->refs, name, def);
+    if (tmp < 0) {
+        xmlRelaxNGDefinePtr prev;
+
+        prev = (xmlRelaxNGDefinePtr)
+            xmlHashLookup(ctxt->grammar->refs, def->name);
+        if (prev == NULL) {
+            if (def->name != NULL) {
+                xmlRngPErr(ctxt, NULL, XML_RNGP_REF_CREATE_FAILED,
+                           "Error refs definitions '%s'\n",
+                           def->name, NULL);
+            } else {
+                xmlRngPErr(ctxt, NULL, XML_RNGP_REF_CREATE_FAILED,
+                           "Error refs definitions\n",
+                           NULL, NULL);
+            }
+        } else {
+            def->nextHash = prev->nextHash;
+            prev->nextHash = def;
+        }
+    }
+}
+
+/**
+ * xmlRelaxNGParseImportRefs:
+ * @ctxt: the parser context
+ * @grammar: the sub grammar
+ *
+ * Import references from the subgrammar into the current grammar
+ *
+ * Returns 0 in case of success, -1 in case of failure
+ */
+static int
+xmlRelaxNGParseImportRefs(xmlRelaxNGParserCtxtPtr ctxt,
+                          xmlRelaxNGGrammarPtr grammar) {
+    if ((ctxt == NULL) || (grammar == NULL) || (ctxt->grammar == NULL))
+        return(-1);
+    if (grammar->refs == NULL)
+        return(0);
+    if (ctxt->grammar->refs == NULL)
+        ctxt->grammar->refs = xmlHashCreate(10);
+    if (ctxt->grammar->refs == NULL) {
+        xmlRngPErr(ctxt, NULL, XML_RNGP_REF_CREATE_FAILED,
+                   "Could not create references hash\n", NULL, NULL);
+        return(-1);
+    }
+    xmlHashScan(grammar->refs, xmlRelaxNGParseImportRef, ctxt);
+    return(0);
+}
+
+/**
+ * xmlRelaxNGProcessExternalRef:
+ * @ctxt: the parser context
+ * @node:  the externlRef node
+ *
+ * Process and compile an externlRef node
+ *
+ * Returns the xmlRelaxNGDefinePtr or NULL in case of error
+ */
+static xmlRelaxNGDefinePtr
+xmlRelaxNGProcessExternalRef(xmlRelaxNGParserCtxtPtr ctxt, xmlNodePtr node)
+{
+    xmlRelaxNGDocumentPtr docu;
+    xmlNodePtr root, tmp;
+    xmlChar *ns;
+    int newNs = 0, oldflags;
+    xmlRelaxNGDefinePtr def;
+
+    docu = node->psvi;
+    if (docu != NULL) {
+        def = xmlRelaxNGNewDefine(ctxt, node);
+        if (def == NULL)
+            return (NULL);
+        def->type = XML_RELAXNG_EXTERNALREF;
+
+        if (docu->content == NULL) {
+            /*
+             * Then do the parsing for good
+             */
+            root = xmlDocGetRootElement(docu->doc);
+            if (root == NULL) {
+                xmlRngPErr(ctxt, node, XML_RNGP_EXTERNALREF_EMTPY,
+                           "xmlRelaxNGParse: %s is empty\n", ctxt->URL,
+                           NULL);
+                return (NULL);
+            }
+            /*
+             * ns transmission rules
+             */
+            ns = xmlGetProp(root, BAD_CAST "ns");
+            if (ns == NULL) {
+                tmp = node;
+                while ((tmp != NULL) && (tmp->type == XML_ELEMENT_NODE)) {
+                    ns = xmlGetProp(tmp, BAD_CAST "ns");
+                    if (ns != NULL) {
+                        break;
+                    }
+                    tmp = tmp->parent;
+                }
+                if (ns != NULL) {
+                    xmlSetProp(root, BAD_CAST "ns", ns);
+                    newNs = 1;
+                    xmlFree(ns);
+                }
+            } else {
+                xmlFree(ns);
+            }
+
+            /*
+             * Parsing to get a precompiled schemas.
+             */
+            oldflags = ctxt->flags;
+            ctxt->flags |= XML_RELAXNG_IN_EXTERNALREF;
+            docu->schema = xmlRelaxNGParseDocument(ctxt, root);
+            ctxt->flags = oldflags;
+            if ((docu->schema != NULL) &&
+                (docu->schema->topgrammar != NULL)) {
+                docu->content = docu->schema->topgrammar->start;
+                if (docu->schema->topgrammar->refs)
+                    xmlRelaxNGParseImportRefs(ctxt, docu->schema->topgrammar);
+            }
+
+            /*
+             * the externalRef may be reused in a different ns context
+             */
+            if (newNs == 1) {
+                xmlUnsetProp(root, BAD_CAST "ns");
+            }
+        }
+        def->content = docu->content;
+    } else {
+        def = NULL;
+    }
+    return (def);
+}
+
+/**
+ * xmlRelaxNGParsePattern:
+ * @ctxt:  a Relax-NG parser context
+ * @node:  the pattern node.
+ *
+ * parse the content of a RelaxNG pattern node.
+ *
+ * Returns the definition pointer or NULL in case of error or if no
+ *     pattern is generated.
+ */
+static xmlRelaxNGDefinePtr
+xmlRelaxNGParsePattern(xmlRelaxNGParserCtxtPtr ctxt, xmlNodePtr node)
+{
+    xmlRelaxNGDefinePtr def = NULL;
+
+    if (node == NULL) {
+        return (NULL);
+    }
+    if (IS_RELAXNG(node, "element")) {
+        def = xmlRelaxNGParseElement(ctxt, node);
+    } else if (IS_RELAXNG(node, "attribute")) {
+        def = xmlRelaxNGParseAttribute(ctxt, node);
+    } else if (IS_RELAXNG(node, "empty")) {
+        def = xmlRelaxNGNewDefine(ctxt, node);
+        if (def == NULL)
+            return (NULL);
+        def->type = XML_RELAXNG_EMPTY;
+        if (node->children != NULL) {
+            xmlRngPErr(ctxt, node, XML_RNGP_EMPTY_NOT_EMPTY,
+                       "empty: had a child node\n", NULL, NULL);
+        }
+    } else if (IS_RELAXNG(node, "text")) {
+        def = xmlRelaxNGNewDefine(ctxt, node);
+        if (def == NULL)
+            return (NULL);
+        def->type = XML_RELAXNG_TEXT;
+        if (node->children != NULL) {
+            xmlRngPErr(ctxt, node, XML_RNGP_TEXT_HAS_CHILD,
+                       "text: had a child node\n", NULL, NULL);
+        }
+    } else if (IS_RELAXNG(node, "zeroOrMore")) {
+        def = xmlRelaxNGNewDefine(ctxt, node);
+        if (def == NULL)
+            return (NULL);
+        def->type = XML_RELAXNG_ZEROORMORE;
+        if (node->children == NULL) {
+            xmlRngPErr(ctxt, node, XML_RNGP_EMPTY_CONSTRUCT,
+                       "Element %s is empty\n", node->name, NULL);
+        } else {
+            def->content =
+                xmlRelaxNGParsePatterns(ctxt, node->children, 1);
+        }
+    } else if (IS_RELAXNG(node, "oneOrMore")) {
+        def = xmlRelaxNGNewDefine(ctxt, node);
+        if (def == NULL)
+            return (NULL);
+        def->type = XML_RELAXNG_ONEORMORE;
+        if (node->children == NULL) {
+            xmlRngPErr(ctxt, node, XML_RNGP_EMPTY_CONSTRUCT,
+                       "Element %s is empty\n", node->name, NULL);
+        } else {
+            def->content =
+                xmlRelaxNGParsePatterns(ctxt, node->children, 1);
+        }
+    } else if (IS_RELAXNG(node, "optional")) {
+        def = xmlRelaxNGNewDefine(ctxt, node);
+        if (def == NULL)
+            return (NULL);
+        def->type = XML_RELAXNG_OPTIONAL;
+        if (node->children == NULL) {
+            xmlRngPErr(ctxt, node, XML_RNGP_EMPTY_CONSTRUCT,
+                       "Element %s is empty\n", node->name, NULL);
+        } else {
+            def->content =
+                xmlRelaxNGParsePatterns(ctxt, node->children, 1);
+        }
+    } else if (IS_RELAXNG(node, "choice")) {
+        def = xmlRelaxNGNewDefine(ctxt, node);
+        if (def == NULL)
+            return (NULL);
+        def->type = XML_RELAXNG_CHOICE;
+        if (node->children == NULL) {
+            xmlRngPErr(ctxt, node, XML_RNGP_EMPTY_CONSTRUCT,
+                       "Element %s is empty\n", node->name, NULL);
+        } else {
+            def->content =
+                xmlRelaxNGParsePatterns(ctxt, node->children, 0);
+        }
+    } else if (IS_RELAXNG(node, "group")) {
+        def = xmlRelaxNGNewDefine(ctxt, node);
+        if (def == NULL)
+            return (NULL);
+        def->type = XML_RELAXNG_GROUP;
+        if (node->children == NULL) {
+            xmlRngPErr(ctxt, node, XML_RNGP_EMPTY_CONSTRUCT,
+                       "Element %s is empty\n", node->name, NULL);
+        } else {
+            def->content =
+                xmlRelaxNGParsePatterns(ctxt, node->children, 0);
+        }
+    } else if (IS_RELAXNG(node, "ref")) {
+        def = xmlRelaxNGNewDefine(ctxt, node);
+        if (def == NULL)
+            return (NULL);
+        def->type = XML_RELAXNG_REF;
+        def->name = xmlGetProp(node, BAD_CAST "name");
+        if (def->name == NULL) {
+            xmlRngPErr(ctxt, node, XML_RNGP_REF_NO_NAME, "ref has no name\n",
+                       NULL, NULL);
+        } else {
+            xmlRelaxNGNormExtSpace(def->name);
+            if (xmlValidateNCName(def->name, 0)) {
+                xmlRngPErr(ctxt, node, XML_RNGP_REF_NAME_INVALID,
+                           "ref name '%s' is not an NCName\n", def->name,
+                           NULL);
+            }
+        }
+        if (node->children != NULL) {
+            xmlRngPErr(ctxt, node, XML_RNGP_REF_NOT_EMPTY, "ref is not empty\n",
+                       NULL, NULL);
+        }
+        if (ctxt->grammar->refs == NULL)
+            ctxt->grammar->refs = xmlHashCreate(10);
+        if (ctxt->grammar->refs == NULL) {
+            xmlRngPErr(ctxt, node, XML_RNGP_REF_CREATE_FAILED,
+                       "Could not create references hash\n", NULL, NULL);
+            def = NULL;
+        } else {
+            int tmp;
+
+            tmp = xmlHashAddEntry(ctxt->grammar->refs, def->name, def);
+            if (tmp < 0) {
+                xmlRelaxNGDefinePtr prev;
+
+                prev = (xmlRelaxNGDefinePtr)
+                    xmlHashLookup(ctxt->grammar->refs, def->name);
+                if (prev == NULL) {
+                    if (def->name != NULL) {
+		        xmlRngPErr(ctxt, node, XML_RNGP_REF_CREATE_FAILED,
+				   "Error refs definitions '%s'\n",
+				   def->name, NULL);
+                    } else {
+		        xmlRngPErr(ctxt, node, XML_RNGP_REF_CREATE_FAILED,
+				   "Error refs definitions\n",
+				   NULL, NULL);
+                    }
+                    def = NULL;
+                } else {
+                    def->nextHash = prev->nextHash;
+                    prev->nextHash = def;
+                }
+            }
+        }
+    } else if (IS_RELAXNG(node, "data")) {
+        def = xmlRelaxNGParseData(ctxt, node);
+    } else if (IS_RELAXNG(node, "value")) {
+        def = xmlRelaxNGParseValue(ctxt, node);
+    } else if (IS_RELAXNG(node, "list")) {
+        def = xmlRelaxNGNewDefine(ctxt, node);
+        if (def == NULL)
+            return (NULL);
+        def->type = XML_RELAXNG_LIST;
+        if (node->children == NULL) {
+            xmlRngPErr(ctxt, node, XML_RNGP_EMPTY_CONSTRUCT,
+                       "Element %s is empty\n", node->name, NULL);
+        } else {
+            def->content =
+                xmlRelaxNGParsePatterns(ctxt, node->children, 0);
+        }
+    } else if (IS_RELAXNG(node, "interleave")) {
+        def = xmlRelaxNGParseInterleave(ctxt, node);
+    } else if (IS_RELAXNG(node, "externalRef")) {
+        def = xmlRelaxNGProcessExternalRef(ctxt, node);
+    } else if (IS_RELAXNG(node, "notAllowed")) {
+        def = xmlRelaxNGNewDefine(ctxt, node);
+        if (def == NULL)
+            return (NULL);
+        def->type = XML_RELAXNG_NOT_ALLOWED;
+        if (node->children != NULL) {
+            xmlRngPErr(ctxt, node, XML_RNGP_NOTALLOWED_NOT_EMPTY,
+                       "xmlRelaxNGParse: notAllowed element is not empty\n",
+                       NULL, NULL);
+        }
+    } else if (IS_RELAXNG(node, "grammar")) {
+        xmlRelaxNGGrammarPtr grammar, old;
+        xmlRelaxNGGrammarPtr oldparent;
+
+#ifdef DEBUG_GRAMMAR
+        xmlGenericError(xmlGenericErrorContext,
+                        "Found <grammar> pattern\n");
+#endif
+
+        oldparent = ctxt->parentgrammar;
+        old = ctxt->grammar;
+        ctxt->parentgrammar = old;
+        grammar = xmlRelaxNGParseGrammar(ctxt, node->children);
+        if (old != NULL) {
+            ctxt->grammar = old;
+            ctxt->parentgrammar = oldparent;
+#if 0
+            if (grammar != NULL) {
+                grammar->next = old->next;
+                old->next = grammar;
+            }
+#endif
+        }
+        if (grammar != NULL)
+            def = grammar->start;
+        else
+            def = NULL;
+    } else if (IS_RELAXNG(node, "parentRef")) {
+        if (ctxt->parentgrammar == NULL) {
+            xmlRngPErr(ctxt, node, XML_RNGP_PARENTREF_NO_PARENT,
+                       "Use of parentRef without a parent grammar\n", NULL,
+                       NULL);
+            return (NULL);
+        }
+        def = xmlRelaxNGNewDefine(ctxt, node);
+        if (def == NULL)
+            return (NULL);
+        def->type = XML_RELAXNG_PARENTREF;
+        def->name = xmlGetProp(node, BAD_CAST "name");
+        if (def->name == NULL) {
+            xmlRngPErr(ctxt, node, XML_RNGP_PARENTREF_NO_NAME,
+                       "parentRef has no name\n", NULL, NULL);
+        } else {
+            xmlRelaxNGNormExtSpace(def->name);
+            if (xmlValidateNCName(def->name, 0)) {
+                xmlRngPErr(ctxt, node, XML_RNGP_PARENTREF_NAME_INVALID,
+                           "parentRef name '%s' is not an NCName\n",
+                           def->name, NULL);
+            }
+        }
+        if (node->children != NULL) {
+            xmlRngPErr(ctxt, node, XML_RNGP_PARENTREF_NOT_EMPTY,
+                       "parentRef is not empty\n", NULL, NULL);
+        }
+        if (ctxt->parentgrammar->refs == NULL)
+            ctxt->parentgrammar->refs = xmlHashCreate(10);
+        if (ctxt->parentgrammar->refs == NULL) {
+            xmlRngPErr(ctxt, node, XML_RNGP_PARENTREF_CREATE_FAILED,
+                       "Could not create references hash\n", NULL, NULL);
+            def = NULL;
+        } else if (def->name != NULL) {
+            int tmp;
+
+            tmp =
+                xmlHashAddEntry(ctxt->parentgrammar->refs, def->name, def);
+            if (tmp < 0) {
+                xmlRelaxNGDefinePtr prev;
+
+                prev = (xmlRelaxNGDefinePtr)
+                    xmlHashLookup(ctxt->parentgrammar->refs, def->name);
+                if (prev == NULL) {
+                    xmlRngPErr(ctxt, node, XML_RNGP_PARENTREF_CREATE_FAILED,
+                               "Internal error parentRef definitions '%s'\n",
+                               def->name, NULL);
+                    def = NULL;
+                } else {
+                    def->nextHash = prev->nextHash;
+                    prev->nextHash = def;
+                }
+            }
+        }
+    } else if (IS_RELAXNG(node, "mixed")) {
+        if (node->children == NULL) {
+            xmlRngPErr(ctxt, node, XML_RNGP_EMPTY_CONSTRUCT, "Mixed is empty\n",
+                       NULL, NULL);
+            def = NULL;
+        } else {
+            def = xmlRelaxNGParseInterleave(ctxt, node);
+            if (def != NULL) {
+                xmlRelaxNGDefinePtr tmp;
+
+                if ((def->content != NULL) && (def->content->next != NULL)) {
+                    tmp = xmlRelaxNGNewDefine(ctxt, node);
+                    if (tmp != NULL) {
+                        tmp->type = XML_RELAXNG_GROUP;
+                        tmp->content = def->content;
+                        def->content = tmp;
+                    }
+                }
+
+                tmp = xmlRelaxNGNewDefine(ctxt, node);
+                if (tmp == NULL)
+                    return (def);
+                tmp->type = XML_RELAXNG_TEXT;
+                tmp->next = def->content;
+                def->content = tmp;
+            }
+        }
+    } else {
+        xmlRngPErr(ctxt, node, XML_RNGP_UNKNOWN_CONSTRUCT,
+                   "Unexpected node %s is not a pattern\n", node->name,
+                   NULL);
+        def = NULL;
+    }
+    return (def);
+}
+
+/**
+ * xmlRelaxNGParseAttribute:
+ * @ctxt:  a Relax-NG parser context
+ * @node:  the element node
+ *
+ * parse the content of a RelaxNG attribute node.
+ *
+ * Returns the definition pointer or NULL in case of error.
+ */
+static xmlRelaxNGDefinePtr
+xmlRelaxNGParseAttribute(xmlRelaxNGParserCtxtPtr ctxt, xmlNodePtr node)
+{
+    xmlRelaxNGDefinePtr ret, cur;
+    xmlNodePtr child;
+    int old_flags;
+
+    ret = xmlRelaxNGNewDefine(ctxt, node);
+    if (ret == NULL)
+        return (NULL);
+    ret->type = XML_RELAXNG_ATTRIBUTE;
+    ret->parent = ctxt->def;
+    child = node->children;
+    if (child == NULL) {
+        xmlRngPErr(ctxt, node, XML_RNGP_ATTRIBUTE_EMPTY,
+                   "xmlRelaxNGParseattribute: attribute has no children\n",
+                   NULL, NULL);
+        return (ret);
+    }
+    old_flags = ctxt->flags;
+    ctxt->flags |= XML_RELAXNG_IN_ATTRIBUTE;
+    cur = xmlRelaxNGParseNameClass(ctxt, child, ret);
+    if (cur != NULL)
+        child = child->next;
+
+    if (child != NULL) {
+        cur = xmlRelaxNGParsePattern(ctxt, child);
+        if (cur != NULL) {
+            switch (cur->type) {
+                case XML_RELAXNG_EMPTY:
+                case XML_RELAXNG_NOT_ALLOWED:
+                case XML_RELAXNG_TEXT:
+                case XML_RELAXNG_ELEMENT:
+                case XML_RELAXNG_DATATYPE:
+                case XML_RELAXNG_VALUE:
+                case XML_RELAXNG_LIST:
+                case XML_RELAXNG_REF:
+                case XML_RELAXNG_PARENTREF:
+                case XML_RELAXNG_EXTERNALREF:
+                case XML_RELAXNG_DEF:
+                case XML_RELAXNG_ONEORMORE:
+                case XML_RELAXNG_ZEROORMORE:
+                case XML_RELAXNG_OPTIONAL:
+                case XML_RELAXNG_CHOICE:
+                case XML_RELAXNG_GROUP:
+                case XML_RELAXNG_INTERLEAVE:
+                case XML_RELAXNG_ATTRIBUTE:
+                    ret->content = cur;
+                    cur->parent = ret;
+                    break;
+                case XML_RELAXNG_START:
+                case XML_RELAXNG_PARAM:
+                case XML_RELAXNG_EXCEPT:
+                    xmlRngPErr(ctxt, node, XML_RNGP_ATTRIBUTE_CONTENT,
+                               "attribute has invalid content\n", NULL,
+                               NULL);
+                    break;
+                case XML_RELAXNG_NOOP:
+                    xmlRngPErr(ctxt, node, XML_RNGP_ATTRIBUTE_NOOP,
+                               "RNG Internal error, noop found in attribute\n",
+                               NULL, NULL);
+                    break;
+            }
+        }
+        child = child->next;
+    }
+    if (child != NULL) {
+        xmlRngPErr(ctxt, node, XML_RNGP_ATTRIBUTE_CHILDREN,
+                   "attribute has multiple children\n", NULL, NULL);
+    }
+    ctxt->flags = old_flags;
+    return (ret);
+}
+
+/**
+ * xmlRelaxNGParseExceptNameClass:
+ * @ctxt:  a Relax-NG parser context
+ * @node:  the except node
+ * @attr:  1 if within an attribute, 0 if within an element
+ *
+ * parse the content of a RelaxNG nameClass node.
+ *
+ * Returns the definition pointer or NULL in case of error.
+ */
+static xmlRelaxNGDefinePtr
+xmlRelaxNGParseExceptNameClass(xmlRelaxNGParserCtxtPtr ctxt,
+                               xmlNodePtr node, int attr)
+{
+    xmlRelaxNGDefinePtr ret, cur, last = NULL;
+    xmlNodePtr child;
+
+    if (!IS_RELAXNG(node, "except")) {
+        xmlRngPErr(ctxt, node, XML_RNGP_EXCEPT_MISSING,
+                   "Expecting an except node\n", NULL, NULL);
+        return (NULL);
+    }
+    if (node->next != NULL) {
+        xmlRngPErr(ctxt, node, XML_RNGP_EXCEPT_MULTIPLE,
+                   "exceptNameClass allows only a single except node\n",
+                   NULL, NULL);
+    }
+    if (node->children == NULL) {
+        xmlRngPErr(ctxt, node, XML_RNGP_EXCEPT_EMPTY, "except has no content\n",
+                   NULL, NULL);
+        return (NULL);
+    }
+
+    ret = xmlRelaxNGNewDefine(ctxt, node);
+    if (ret == NULL)
+        return (NULL);
+    ret->type = XML_RELAXNG_EXCEPT;
+    child = node->children;
+    while (child != NULL) {
+        cur = xmlRelaxNGNewDefine(ctxt, child);
+        if (cur == NULL)
+            break;
+        if (attr)
+            cur->type = XML_RELAXNG_ATTRIBUTE;
+        else
+            cur->type = XML_RELAXNG_ELEMENT;
+
+        if (xmlRelaxNGParseNameClass(ctxt, child, cur) != NULL) {
+            if (last == NULL) {
+                ret->content = cur;
+            } else {
+                last->next = cur;
+            }
+            last = cur;
+        }
+        child = child->next;
+    }
+
+    return (ret);
+}
+
+/**
+ * xmlRelaxNGParseNameClass:
+ * @ctxt:  a Relax-NG parser context
+ * @node:  the nameClass node
+ * @def:  the current definition
+ *
+ * parse the content of a RelaxNG nameClass node.
+ *
+ * Returns the definition pointer or NULL in case of error.
+ */
+static xmlRelaxNGDefinePtr
+xmlRelaxNGParseNameClass(xmlRelaxNGParserCtxtPtr ctxt, xmlNodePtr node,
+                         xmlRelaxNGDefinePtr def)
+{
+    xmlRelaxNGDefinePtr ret, tmp;
+    xmlChar *val;
+
+    ret = def;
+    if ((IS_RELAXNG(node, "name")) || (IS_RELAXNG(node, "anyName")) ||
+        (IS_RELAXNG(node, "nsName"))) {
+        if ((def->type != XML_RELAXNG_ELEMENT) &&
+            (def->type != XML_RELAXNG_ATTRIBUTE)) {
+            ret = xmlRelaxNGNewDefine(ctxt, node);
+            if (ret == NULL)
+                return (NULL);
+            ret->parent = def;
+            if (ctxt->flags & XML_RELAXNG_IN_ATTRIBUTE)
+                ret->type = XML_RELAXNG_ATTRIBUTE;
+            else
+                ret->type = XML_RELAXNG_ELEMENT;
+        }
+    }
+    if (IS_RELAXNG(node, "name")) {
+        val = xmlNodeGetContent(node);
+        xmlRelaxNGNormExtSpace(val);
+        if (xmlValidateNCName(val, 0)) {
+	    if (node->parent != NULL)
+		xmlRngPErr(ctxt, node, XML_RNGP_ELEMENT_NAME,
+			   "Element %s name '%s' is not an NCName\n",
+			   node->parent->name, val);
+	    else
+		xmlRngPErr(ctxt, node, XML_RNGP_ELEMENT_NAME,
+			   "name '%s' is not an NCName\n",
+			   val, NULL);
+        }
+        ret->name = val;
+        val = xmlGetProp(node, BAD_CAST "ns");
+        ret->ns = val;
+        if ((ctxt->flags & XML_RELAXNG_IN_ATTRIBUTE) &&
+            (val != NULL) &&
+            (xmlStrEqual(val, BAD_CAST "http://www.w3.org/2000/xmlns"))) {
+	    xmlRngPErr(ctxt, node, XML_RNGP_XML_NS,
+                        "Attribute with namespace '%s' is not allowed\n",
+                        val, NULL);
+        }
+        if ((ctxt->flags & XML_RELAXNG_IN_ATTRIBUTE) &&
+            (val != NULL) &&
+            (val[0] == 0) && (xmlStrEqual(ret->name, BAD_CAST "xmlns"))) {
+	    xmlRngPErr(ctxt, node, XML_RNGP_XMLNS_NAME,
+                       "Attribute with QName 'xmlns' is not allowed\n",
+                       val, NULL);
+        }
+    } else if (IS_RELAXNG(node, "anyName")) {
+        ret->name = NULL;
+        ret->ns = NULL;
+        if (node->children != NULL) {
+            ret->nameClass =
+                xmlRelaxNGParseExceptNameClass(ctxt, node->children,
+                                               (def->type ==
+                                                XML_RELAXNG_ATTRIBUTE));
+        }
+    } else if (IS_RELAXNG(node, "nsName")) {
+        ret->name = NULL;
+        ret->ns = xmlGetProp(node, BAD_CAST "ns");
+        if (ret->ns == NULL) {
+            xmlRngPErr(ctxt, node, XML_RNGP_NSNAME_NO_NS,
+                       "nsName has no ns attribute\n", NULL, NULL);
+        }
+        if ((ctxt->flags & XML_RELAXNG_IN_ATTRIBUTE) &&
+            (ret->ns != NULL) &&
+            (xmlStrEqual
+             (ret->ns, BAD_CAST "http://www.w3.org/2000/xmlns"))) {
+            xmlRngPErr(ctxt, node, XML_RNGP_XML_NS,
+                       "Attribute with namespace '%s' is not allowed\n",
+                       ret->ns, NULL);
+        }
+        if (node->children != NULL) {
+            ret->nameClass =
+                xmlRelaxNGParseExceptNameClass(ctxt, node->children,
+                                               (def->type ==
+                                                XML_RELAXNG_ATTRIBUTE));
+        }
+    } else if (IS_RELAXNG(node, "choice")) {
+        xmlNodePtr child;
+        xmlRelaxNGDefinePtr last = NULL;
+
+        ret = xmlRelaxNGNewDefine(ctxt, node);
+        if (ret == NULL)
+            return (NULL);
+        ret->parent = def;
+        ret->type = XML_RELAXNG_CHOICE;
+
+        if (node->children == NULL) {
+            xmlRngPErr(ctxt, node, XML_RNGP_CHOICE_EMPTY,
+                       "Element choice is empty\n", NULL, NULL);
+        } else {
+
+            child = node->children;
+            while (child != NULL) {
+                tmp = xmlRelaxNGParseNameClass(ctxt, child, ret);
+                if (tmp != NULL) {
+                    if (last == NULL) {
+                        last = ret->nameClass = tmp;
+                    } else {
+                        last->next = tmp;
+                        last = tmp;
+                    }
+                }
+                child = child->next;
+            }
+        }
+    } else {
+        xmlRngPErr(ctxt, node, XML_RNGP_CHOICE_CONTENT,
+                   "expecting name, anyName, nsName or choice : got %s\n",
+                   (node == NULL ? (const xmlChar *) "nothing" : node->name),
+		   NULL);
+        return (NULL);
+    }
+    if (ret != def) {
+        if (def->nameClass == NULL) {
+            def->nameClass = ret;
+        } else {
+            tmp = def->nameClass;
+            while (tmp->next != NULL) {
+                tmp = tmp->next;
+            }
+            tmp->next = ret;
+        }
+    }
+    return (ret);
+}
+
+/**
+ * xmlRelaxNGParseElement:
+ * @ctxt:  a Relax-NG parser context
+ * @node:  the element node
+ *
+ * parse the content of a RelaxNG element node.
+ *
+ * Returns the definition pointer or NULL in case of error.
+ */
+static xmlRelaxNGDefinePtr
+xmlRelaxNGParseElement(xmlRelaxNGParserCtxtPtr ctxt, xmlNodePtr node)
+{
+    xmlRelaxNGDefinePtr ret, cur, last;
+    xmlNodePtr child;
+    const xmlChar *olddefine;
+
+    ret = xmlRelaxNGNewDefine(ctxt, node);
+    if (ret == NULL)
+        return (NULL);
+    ret->type = XML_RELAXNG_ELEMENT;
+    ret->parent = ctxt->def;
+    child = node->children;
+    if (child == NULL) {
+        xmlRngPErr(ctxt, node, XML_RNGP_ELEMENT_EMPTY,
+                   "xmlRelaxNGParseElement: element has no children\n",
+                   NULL, NULL);
+        return (ret);
+    }
+    cur = xmlRelaxNGParseNameClass(ctxt, child, ret);
+    if (cur != NULL)
+        child = child->next;
+
+    if (child == NULL) {
+        xmlRngPErr(ctxt, node, XML_RNGP_ELEMENT_NO_CONTENT,
+                   "xmlRelaxNGParseElement: element has no content\n",
+                   NULL, NULL);
+        return (ret);
+    }
+    olddefine = ctxt->define;
+    ctxt->define = NULL;
+    last = NULL;
+    while (child != NULL) {
+        cur = xmlRelaxNGParsePattern(ctxt, child);
+        if (cur != NULL) {
+            cur->parent = ret;
+            switch (cur->type) {
+                case XML_RELAXNG_EMPTY:
+                case XML_RELAXNG_NOT_ALLOWED:
+                case XML_RELAXNG_TEXT:
+                case XML_RELAXNG_ELEMENT:
+                case XML_RELAXNG_DATATYPE:
+                case XML_RELAXNG_VALUE:
+                case XML_RELAXNG_LIST:
+                case XML_RELAXNG_REF:
+                case XML_RELAXNG_PARENTREF:
+                case XML_RELAXNG_EXTERNALREF:
+                case XML_RELAXNG_DEF:
+                case XML_RELAXNG_ZEROORMORE:
+                case XML_RELAXNG_ONEORMORE:
+                case XML_RELAXNG_OPTIONAL:
+                case XML_RELAXNG_CHOICE:
+                case XML_RELAXNG_GROUP:
+                case XML_RELAXNG_INTERLEAVE:
+                    if (last == NULL) {
+                        ret->content = last = cur;
+                    } else {
+                        if ((last->type == XML_RELAXNG_ELEMENT) &&
+                            (ret->content == last)) {
+                            ret->content = xmlRelaxNGNewDefine(ctxt, node);
+                            if (ret->content != NULL) {
+                                ret->content->type = XML_RELAXNG_GROUP;
+                                ret->content->content = last;
+                            } else {
+                                ret->content = last;
+                            }
+                        }
+                        last->next = cur;
+                        last = cur;
+                    }
+                    break;
+                case XML_RELAXNG_ATTRIBUTE:
+                    cur->next = ret->attrs;
+                    ret->attrs = cur;
+                    break;
+                case XML_RELAXNG_START:
+                    xmlRngPErr(ctxt, node, XML_RNGP_ELEMENT_CONTENT,
+                               "RNG Internal error, start found in element\n",
+                               NULL, NULL);
+                    break;
+                case XML_RELAXNG_PARAM:
+                    xmlRngPErr(ctxt, node, XML_RNGP_ELEMENT_CONTENT,
+                               "RNG Internal error, param found in element\n",
+                               NULL, NULL);
+                    break;
+                case XML_RELAXNG_EXCEPT:
+                    xmlRngPErr(ctxt, node, XML_RNGP_ELEMENT_CONTENT,
+                               "RNG Internal error, except found in element\n",
+                               NULL, NULL);
+                    break;
+                case XML_RELAXNG_NOOP:
+                    xmlRngPErr(ctxt, node, XML_RNGP_ELEMENT_CONTENT,
+                               "RNG Internal error, noop found in element\n",
+                               NULL, NULL);
+                    break;
+            }
+        }
+        child = child->next;
+    }
+    ctxt->define = olddefine;
+    return (ret);
+}
+
+/**
+ * xmlRelaxNGParsePatterns:
+ * @ctxt:  a Relax-NG parser context
+ * @nodes:  list of nodes
+ * @group:  use an implicit <group> for elements
+ *
+ * parse the content of a RelaxNG start node.
+ *
+ * Returns the definition pointer or NULL in case of error.
+ */
+static xmlRelaxNGDefinePtr
+xmlRelaxNGParsePatterns(xmlRelaxNGParserCtxtPtr ctxt, xmlNodePtr nodes,
+                        int group)
+{
+    xmlRelaxNGDefinePtr def = NULL, last = NULL, cur, parent;
+
+    parent = ctxt->def;
+    while (nodes != NULL) {
+        if (IS_RELAXNG(nodes, "element")) {
+            cur = xmlRelaxNGParseElement(ctxt, nodes);
+            if (def == NULL) {
+                def = last = cur;
+            } else {
+                if ((group == 1) && (def->type == XML_RELAXNG_ELEMENT) &&
+                    (def == last)) {
+                    def = xmlRelaxNGNewDefine(ctxt, nodes);
+                    def->type = XML_RELAXNG_GROUP;
+                    def->content = last;
+                }
+                last->next = cur;
+                last = cur;
+            }
+            cur->parent = parent;
+        } else {
+            cur = xmlRelaxNGParsePattern(ctxt, nodes);
+            if (cur != NULL) {
+                if (def == NULL) {
+                    def = last = cur;
+                } else {
+                    last->next = cur;
+                    last = cur;
+                }
+            }
+        }
+        nodes = nodes->next;
+    }
+    return (def);
+}
+
+/**
+ * xmlRelaxNGParseStart:
+ * @ctxt:  a Relax-NG parser context
+ * @nodes:  start children nodes
+ *
+ * parse the content of a RelaxNG start node.
+ *
+ * Returns 0 in case of success, -1 in case of error
+ */
+static int
+xmlRelaxNGParseStart(xmlRelaxNGParserCtxtPtr ctxt, xmlNodePtr nodes)
+{
+    int ret = 0;
+    xmlRelaxNGDefinePtr def = NULL, last;
+
+    if (nodes == NULL) {
+        xmlRngPErr(ctxt, nodes, XML_RNGP_START_EMPTY, "start has no children\n",
+                   NULL, NULL);
+        return (-1);
+    }
+    if (IS_RELAXNG(nodes, "empty")) {
+        def = xmlRelaxNGNewDefine(ctxt, nodes);
+        if (def == NULL)
+            return (-1);
+        def->type = XML_RELAXNG_EMPTY;
+        if (nodes->children != NULL) {
+            xmlRngPErr(ctxt, nodes, XML_RNGP_EMPTY_CONTENT,
+                       "element empty is not empty\n", NULL, NULL);
+        }
+    } else if (IS_RELAXNG(nodes, "notAllowed")) {
+        def = xmlRelaxNGNewDefine(ctxt, nodes);
+        if (def == NULL)
+            return (-1);
+        def->type = XML_RELAXNG_NOT_ALLOWED;
+        if (nodes->children != NULL) {
+            xmlRngPErr(ctxt, nodes, XML_RNGP_NOTALLOWED_NOT_EMPTY,
+                       "element notAllowed is not empty\n", NULL, NULL);
+        }
+    } else {
+        def = xmlRelaxNGParsePatterns(ctxt, nodes, 1);
+    }
+    if (ctxt->grammar->start != NULL) {
+        last = ctxt->grammar->start;
+        while (last->next != NULL)
+            last = last->next;
+        last->next = def;
+    } else {
+        ctxt->grammar->start = def;
+    }
+    nodes = nodes->next;
+    if (nodes != NULL) {
+        xmlRngPErr(ctxt, nodes, XML_RNGP_START_CONTENT,
+                   "start more than one children\n", NULL, NULL);
+        return (-1);
+    }
+    return (ret);
+}
+
+/**
+ * xmlRelaxNGParseGrammarContent:
+ * @ctxt:  a Relax-NG parser context
+ * @nodes:  grammar children nodes
+ *
+ * parse the content of a RelaxNG grammar node.
+ *
+ * Returns 0 in case of success, -1 in case of error
+ */
+static int
+xmlRelaxNGParseGrammarContent(xmlRelaxNGParserCtxtPtr ctxt,
+                              xmlNodePtr nodes)
+{
+    int ret = 0, tmp;
+
+    if (nodes == NULL) {
+        xmlRngPErr(ctxt, nodes, XML_RNGP_GRAMMAR_EMPTY,
+                   "grammar has no children\n", NULL, NULL);
+        return (-1);
+    }
+    while (nodes != NULL) {
+        if (IS_RELAXNG(nodes, "start")) {
+            if (nodes->children == NULL) {
+                xmlRngPErr(ctxt, nodes, XML_RNGP_START_EMPTY,
+                           "start has no children\n", NULL, NULL);
+            } else {
+                tmp = xmlRelaxNGParseStart(ctxt, nodes->children);
+                if (tmp != 0)
+                    ret = -1;
+            }
+        } else if (IS_RELAXNG(nodes, "define")) {
+            tmp = xmlRelaxNGParseDefine(ctxt, nodes);
+            if (tmp != 0)
+                ret = -1;
+        } else if (IS_RELAXNG(nodes, "include")) {
+            tmp = xmlRelaxNGParseInclude(ctxt, nodes);
+            if (tmp != 0)
+                ret = -1;
+        } else {
+            xmlRngPErr(ctxt, nodes, XML_RNGP_GRAMMAR_CONTENT,
+                       "grammar has unexpected child %s\n", nodes->name,
+                       NULL);
+            ret = -1;
+        }
+        nodes = nodes->next;
+    }
+    return (ret);
+}
+
+/**
+ * xmlRelaxNGCheckReference:
+ * @ref:  the ref
+ * @ctxt:  a Relax-NG parser context
+ * @name:  the name associated to the defines
+ *
+ * Applies the 4.17. combine attribute rule for all the define
+ * element of a given grammar using the same name.
+ */
+static void
+xmlRelaxNGCheckReference(xmlRelaxNGDefinePtr ref,
+                         xmlRelaxNGParserCtxtPtr ctxt,
+                         const xmlChar * name)
+{
+    xmlRelaxNGGrammarPtr grammar;
+    xmlRelaxNGDefinePtr def, cur;
+
+    /*
+     * Those rules don't apply to imported ref from xmlRelaxNGParseImportRef
+     */
+    if (ref->dflags & IS_EXTERNAL_REF)
+        return;
+
+    grammar = ctxt->grammar;
+    if (grammar == NULL) {
+        xmlRngPErr(ctxt, ref->node, XML_ERR_INTERNAL_ERROR,
+                   "Internal error: no grammar in CheckReference %s\n",
+                   name, NULL);
+        return;
+    }
+    if (ref->content != NULL) {
+        xmlRngPErr(ctxt, ref->node, XML_ERR_INTERNAL_ERROR,
+                   "Internal error: reference has content in CheckReference %s\n",
+                   name, NULL);
+        return;
+    }
+    if (grammar->defs != NULL) {
+        def = xmlHashLookup(grammar->defs, name);
+        if (def != NULL) {
+            cur = ref;
+            while (cur != NULL) {
+                cur->content = def;
+                cur = cur->nextHash;
+            }
+        } else {
+            xmlRngPErr(ctxt, ref->node, XML_RNGP_REF_NO_DEF,
+                       "Reference %s has no matching definition\n", name,
+                       NULL);
+        }
+    } else {
+        xmlRngPErr(ctxt, ref->node, XML_RNGP_REF_NO_DEF,
+                   "Reference %s has no matching definition\n", name,
+                   NULL);
+    }
+}
+
+/**
+ * xmlRelaxNGCheckCombine:
+ * @define:  the define(s) list
+ * @ctxt:  a Relax-NG parser context
+ * @name:  the name associated to the defines
+ *
+ * Applies the 4.17. combine attribute rule for all the define
+ * element of a given grammar using the same name.
+ */
+static void
+xmlRelaxNGCheckCombine(xmlRelaxNGDefinePtr define,
+                       xmlRelaxNGParserCtxtPtr ctxt, const xmlChar * name)
+{
+    xmlChar *combine;
+    int choiceOrInterleave = -1;
+    int missing = 0;
+    xmlRelaxNGDefinePtr cur, last, tmp, tmp2;
+
+    if (define->nextHash == NULL)
+        return;
+    cur = define;
+    while (cur != NULL) {
+        combine = xmlGetProp(cur->node, BAD_CAST "combine");
+        if (combine != NULL) {
+            if (xmlStrEqual(combine, BAD_CAST "choice")) {
+                if (choiceOrInterleave == -1)
+                    choiceOrInterleave = 1;
+                else if (choiceOrInterleave == 0) {
+                    xmlRngPErr(ctxt, define->node, XML_RNGP_DEF_CHOICE_AND_INTERLEAVE,
+                               "Defines for %s use both 'choice' and 'interleave'\n",
+                               name, NULL);
+                }
+            } else if (xmlStrEqual(combine, BAD_CAST "interleave")) {
+                if (choiceOrInterleave == -1)
+                    choiceOrInterleave = 0;
+                else if (choiceOrInterleave == 1) {
+                    xmlRngPErr(ctxt, define->node, XML_RNGP_DEF_CHOICE_AND_INTERLEAVE,
+                               "Defines for %s use both 'choice' and 'interleave'\n",
+                               name, NULL);
+                }
+            } else {
+                xmlRngPErr(ctxt, define->node, XML_RNGP_UNKNOWN_COMBINE,
+                           "Defines for %s use unknown combine value '%s''\n",
+                           name, combine);
+            }
+            xmlFree(combine);
+        } else {
+            if (missing == 0)
+                missing = 1;
+            else {
+                xmlRngPErr(ctxt, define->node, XML_RNGP_NEED_COMBINE,
+                           "Some defines for %s needs the combine attribute\n",
+                           name, NULL);
+            }
+        }
+
+        cur = cur->nextHash;
+    }
+#ifdef DEBUG
+    xmlGenericError(xmlGenericErrorContext,
+                    "xmlRelaxNGCheckCombine(): merging %s defines: %d\n",
+                    name, choiceOrInterleave);
+#endif
+    if (choiceOrInterleave == -1)
+        choiceOrInterleave = 0;
+    cur = xmlRelaxNGNewDefine(ctxt, define->node);
+    if (cur == NULL)
+        return;
+    if (choiceOrInterleave == 0)
+        cur->type = XML_RELAXNG_INTERLEAVE;
+    else
+        cur->type = XML_RELAXNG_CHOICE;
+    tmp = define;
+    last = NULL;
+    while (tmp != NULL) {
+        if (tmp->content != NULL) {
+            if (tmp->content->next != NULL) {
+                /*
+                 * we need first to create a wrapper.
+                 */
+                tmp2 = xmlRelaxNGNewDefine(ctxt, tmp->content->node);
+                if (tmp2 == NULL)
+                    break;
+                tmp2->type = XML_RELAXNG_GROUP;
+                tmp2->content = tmp->content;
+            } else {
+                tmp2 = tmp->content;
+            }
+            if (last == NULL) {
+                cur->content = tmp2;
+            } else {
+                last->next = tmp2;
+            }
+            last = tmp2;
+        }
+        tmp->content = cur;
+        tmp = tmp->nextHash;
+    }
+    define->content = cur;
+    if (choiceOrInterleave == 0) {
+        if (ctxt->interleaves == NULL)
+            ctxt->interleaves = xmlHashCreate(10);
+        if (ctxt->interleaves == NULL) {
+            xmlRngPErr(ctxt, define->node, XML_RNGP_INTERLEAVE_CREATE_FAILED,
+                       "Failed to create interleaves hash table\n", NULL,
+                       NULL);
+        } else {
+            char tmpname[32];
+
+            snprintf(tmpname, 32, "interleave%d", ctxt->nbInterleaves++);
+            if (xmlHashAddEntry(ctxt->interleaves, BAD_CAST tmpname, cur) <
+                0) {
+                xmlRngPErr(ctxt, define->node, XML_RNGP_INTERLEAVE_CREATE_FAILED,
+                           "Failed to add %s to hash table\n",
+			   (const xmlChar *) tmpname, NULL);
+            }
+        }
+    }
+}
+
+/**
+ * xmlRelaxNGCombineStart:
+ * @ctxt:  a Relax-NG parser context
+ * @grammar:  the grammar
+ *
+ * Applies the 4.17. combine rule for all the start
+ * element of a given grammar.
+ */
+static void
+xmlRelaxNGCombineStart(xmlRelaxNGParserCtxtPtr ctxt,
+                       xmlRelaxNGGrammarPtr grammar)
+{
+    xmlRelaxNGDefinePtr starts;
+    xmlChar *combine;
+    int choiceOrInterleave = -1;
+    int missing = 0;
+    xmlRelaxNGDefinePtr cur;
+
+    starts = grammar->start;
+    if ((starts == NULL) || (starts->next == NULL))
+        return;
+    cur = starts;
+    while (cur != NULL) {
+        if ((cur->node == NULL) || (cur->node->parent == NULL) ||
+            (!xmlStrEqual(cur->node->parent->name, BAD_CAST "start"))) {
+            combine = NULL;
+            xmlRngPErr(ctxt, cur->node, XML_RNGP_START_MISSING,
+                       "Internal error: start element not found\n", NULL,
+                       NULL);
+        } else {
+            combine = xmlGetProp(cur->node->parent, BAD_CAST "combine");
+        }
+
+        if (combine != NULL) {
+            if (xmlStrEqual(combine, BAD_CAST "choice")) {
+                if (choiceOrInterleave == -1)
+                    choiceOrInterleave = 1;
+                else if (choiceOrInterleave == 0) {
+                    xmlRngPErr(ctxt, cur->node, XML_RNGP_START_CHOICE_AND_INTERLEAVE,
+                               "<start> use both 'choice' and 'interleave'\n",
+                               NULL, NULL);
+                }
+            } else if (xmlStrEqual(combine, BAD_CAST "interleave")) {
+                if (choiceOrInterleave == -1)
+                    choiceOrInterleave = 0;
+                else if (choiceOrInterleave == 1) {
+                    xmlRngPErr(ctxt, cur->node, XML_RNGP_START_CHOICE_AND_INTERLEAVE,
+                               "<start> use both 'choice' and 'interleave'\n",
+                               NULL, NULL);
+                }
+            } else {
+                xmlRngPErr(ctxt, cur->node, XML_RNGP_UNKNOWN_COMBINE,
+                           "<start> uses unknown combine value '%s''\n",
+                           combine, NULL);
+            }
+            xmlFree(combine);
+        } else {
+            if (missing == 0)
+                missing = 1;
+            else {
+                xmlRngPErr(ctxt, cur->node, XML_RNGP_NEED_COMBINE,
+                           "Some <start> element miss the combine attribute\n",
+                           NULL, NULL);
+            }
+        }
+
+        cur = cur->next;
+    }
+#ifdef DEBUG
+    xmlGenericError(xmlGenericErrorContext,
+                    "xmlRelaxNGCombineStart(): merging <start>: %d\n",
+                    choiceOrInterleave);
+#endif
+    if (choiceOrInterleave == -1)
+        choiceOrInterleave = 0;
+    cur = xmlRelaxNGNewDefine(ctxt, starts->node);
+    if (cur == NULL)
+        return;
+    if (choiceOrInterleave == 0)
+        cur->type = XML_RELAXNG_INTERLEAVE;
+    else
+        cur->type = XML_RELAXNG_CHOICE;
+    cur->content = grammar->start;
+    grammar->start = cur;
+    if (choiceOrInterleave == 0) {
+        if (ctxt->interleaves == NULL)
+            ctxt->interleaves = xmlHashCreate(10);
+        if (ctxt->interleaves == NULL) {
+            xmlRngPErr(ctxt, cur->node, XML_RNGP_INTERLEAVE_CREATE_FAILED,
+                       "Failed to create interleaves hash table\n", NULL,
+                       NULL);
+        } else {
+            char tmpname[32];
+
+            snprintf(tmpname, 32, "interleave%d", ctxt->nbInterleaves++);
+            if (xmlHashAddEntry(ctxt->interleaves, BAD_CAST tmpname, cur) <
+                0) {
+                xmlRngPErr(ctxt, cur->node, XML_RNGP_INTERLEAVE_CREATE_FAILED,
+                           "Failed to add %s to hash table\n",
+			   (const xmlChar *) tmpname, NULL);
+            }
+        }
+    }
+}
+
+/**
+ * xmlRelaxNGCheckCycles:
+ * @ctxt:  a Relax-NG parser context
+ * @nodes:  grammar children nodes
+ * @depth:  the counter
+ *
+ * Check for cycles.
+ *
+ * Returns 0 if check passed, and -1 in case of error
+ */
+static int
+xmlRelaxNGCheckCycles(xmlRelaxNGParserCtxtPtr ctxt,
+                      xmlRelaxNGDefinePtr cur, int depth)
+{
+    int ret = 0;
+
+    while ((ret == 0) && (cur != NULL)) {
+        if ((cur->type == XML_RELAXNG_REF) ||
+            (cur->type == XML_RELAXNG_PARENTREF)) {
+            if (cur->depth == -1) {
+                cur->depth = depth;
+                ret = xmlRelaxNGCheckCycles(ctxt, cur->content, depth);
+                cur->depth = -2;
+            } else if (depth == cur->depth) {
+                xmlRngPErr(ctxt, cur->node, XML_RNGP_REF_CYCLE,
+                           "Detected a cycle in %s references\n",
+                           cur->name, NULL);
+                return (-1);
+            }
+        } else if (cur->type == XML_RELAXNG_ELEMENT) {
+            ret = xmlRelaxNGCheckCycles(ctxt, cur->content, depth + 1);
+        } else {
+            ret = xmlRelaxNGCheckCycles(ctxt, cur->content, depth);
+        }
+        cur = cur->next;
+    }
+    return (ret);
+}
+
+/**
+ * xmlRelaxNGTryUnlink:
+ * @ctxt:  a Relax-NG parser context
+ * @cur:  the definition to unlink
+ * @parent:  the parent definition
+ * @prev:  the previous sibling definition
+ *
+ * Try to unlink a definition. If not possble make it a NOOP
+ *
+ * Returns the new prev definition
+ */
+static xmlRelaxNGDefinePtr
+xmlRelaxNGTryUnlink(xmlRelaxNGParserCtxtPtr ctxt ATTRIBUTE_UNUSED,
+                    xmlRelaxNGDefinePtr cur,
+                    xmlRelaxNGDefinePtr parent, xmlRelaxNGDefinePtr prev)
+{
+    if (prev != NULL) {
+        prev->next = cur->next;
+    } else {
+        if (parent != NULL) {
+            if (parent->content == cur)
+                parent->content = cur->next;
+            else if (parent->attrs == cur)
+                parent->attrs = cur->next;
+            else if (parent->nameClass == cur)
+                parent->nameClass = cur->next;
+        } else {
+            cur->type = XML_RELAXNG_NOOP;
+            prev = cur;
+        }
+    }
+    return (prev);
+}
+
+/**
+ * xmlRelaxNGSimplify:
+ * @ctxt:  a Relax-NG parser context
+ * @nodes:  grammar children nodes
+ *
+ * Check for simplification of empty and notAllowed
+ */
+static void
+xmlRelaxNGSimplify(xmlRelaxNGParserCtxtPtr ctxt,
+                   xmlRelaxNGDefinePtr cur, xmlRelaxNGDefinePtr parent)
+{
+    xmlRelaxNGDefinePtr prev = NULL;
+
+    while (cur != NULL) {
+        if ((cur->type == XML_RELAXNG_REF) ||
+            (cur->type == XML_RELAXNG_PARENTREF)) {
+            if (cur->depth != -3) {
+                cur->depth = -3;
+                xmlRelaxNGSimplify(ctxt, cur->content, cur);
+            }
+        } else if (cur->type == XML_RELAXNG_NOT_ALLOWED) {
+            cur->parent = parent;
+            if ((parent != NULL) &&
+                ((parent->type == XML_RELAXNG_ATTRIBUTE) ||
+                 (parent->type == XML_RELAXNG_LIST) ||
+                 (parent->type == XML_RELAXNG_GROUP) ||
+                 (parent->type == XML_RELAXNG_INTERLEAVE) ||
+                 (parent->type == XML_RELAXNG_ONEORMORE) ||
+                 (parent->type == XML_RELAXNG_ZEROORMORE))) {
+                parent->type = XML_RELAXNG_NOT_ALLOWED;
+                break;
+            }
+            if ((parent != NULL) && (parent->type == XML_RELAXNG_CHOICE)) {
+                prev = xmlRelaxNGTryUnlink(ctxt, cur, parent, prev);
+            } else
+                prev = cur;
+        } else if (cur->type == XML_RELAXNG_EMPTY) {
+            cur->parent = parent;
+            if ((parent != NULL) &&
+                ((parent->type == XML_RELAXNG_ONEORMORE) ||
+                 (parent->type == XML_RELAXNG_ZEROORMORE))) {
+                parent->type = XML_RELAXNG_EMPTY;
+                break;
+            }
+            if ((parent != NULL) &&
+                ((parent->type == XML_RELAXNG_GROUP) ||
+                 (parent->type == XML_RELAXNG_INTERLEAVE))) {
+                prev = xmlRelaxNGTryUnlink(ctxt, cur, parent, prev);
+            } else
+                prev = cur;
+        } else {
+            cur->parent = parent;
+            if (cur->content != NULL)
+                xmlRelaxNGSimplify(ctxt, cur->content, cur);
+            if ((cur->type != XML_RELAXNG_VALUE) && (cur->attrs != NULL))
+                xmlRelaxNGSimplify(ctxt, cur->attrs, cur);
+            if (cur->nameClass != NULL)
+                xmlRelaxNGSimplify(ctxt, cur->nameClass, cur);
+            /*
+             * On Elements, try to move attribute only generating rules on
+             * the attrs rules.
+             */
+            if (cur->type == XML_RELAXNG_ELEMENT) {
+                int attronly;
+                xmlRelaxNGDefinePtr tmp, pre;
+
+                while (cur->content != NULL) {
+                    attronly =
+                        xmlRelaxNGGenerateAttributes(ctxt, cur->content);
+                    if (attronly == 1) {
+                        /*
+                         * migrate cur->content to attrs
+                         */
+                        tmp = cur->content;
+                        cur->content = tmp->next;
+                        tmp->next = cur->attrs;
+                        cur->attrs = tmp;
+                    } else {
+                        /*
+                         * cur->content can generate elements or text
+                         */
+                        break;
+                    }
+                }
+                pre = cur->content;
+                while ((pre != NULL) && (pre->next != NULL)) {
+                    tmp = pre->next;
+                    attronly = xmlRelaxNGGenerateAttributes(ctxt, tmp);
+                    if (attronly == 1) {
+                        /*
+                         * migrate tmp to attrs
+                         */
+                        pre->next = tmp->next;
+                        tmp->next = cur->attrs;
+                        cur->attrs = tmp;
+                    } else {
+                        pre = tmp;
+                    }
+                }
+            }
+            /*
+             * This may result in a simplification
+             */
+            if ((cur->type == XML_RELAXNG_GROUP) ||
+                (cur->type == XML_RELAXNG_INTERLEAVE)) {
+                if (cur->content == NULL)
+                    cur->type = XML_RELAXNG_EMPTY;
+                else if (cur->content->next == NULL) {
+                    if ((parent == NULL) && (prev == NULL)) {
+                        cur->type = XML_RELAXNG_NOOP;
+                    } else if (prev == NULL) {
+                        parent->content = cur->content;
+                        cur->content->next = cur->next;
+                        cur = cur->content;
+                    } else {
+                        cur->content->next = cur->next;
+                        prev->next = cur->content;
+                        cur = cur->content;
+                    }
+                }
+            }
+            /*
+             * the current node may have been transformed back
+             */
+            if ((cur->type == XML_RELAXNG_EXCEPT) &&
+                (cur->content != NULL) &&
+                (cur->content->type == XML_RELAXNG_NOT_ALLOWED)) {
+                prev = xmlRelaxNGTryUnlink(ctxt, cur, parent, prev);
+            } else if (cur->type == XML_RELAXNG_NOT_ALLOWED) {
+                if ((parent != NULL) &&
+                    ((parent->type == XML_RELAXNG_ATTRIBUTE) ||
+                     (parent->type == XML_RELAXNG_LIST) ||
+                     (parent->type == XML_RELAXNG_GROUP) ||
+                     (parent->type == XML_RELAXNG_INTERLEAVE) ||
+                     (parent->type == XML_RELAXNG_ONEORMORE) ||
+                     (parent->type == XML_RELAXNG_ZEROORMORE))) {
+                    parent->type = XML_RELAXNG_NOT_ALLOWED;
+                    break;
+                }
+                if ((parent != NULL) &&
+                    (parent->type == XML_RELAXNG_CHOICE)) {
+                    prev = xmlRelaxNGTryUnlink(ctxt, cur, parent, prev);
+                } else
+                    prev = cur;
+            } else if (cur->type == XML_RELAXNG_EMPTY) {
+                if ((parent != NULL) &&
+                    ((parent->type == XML_RELAXNG_ONEORMORE) ||
+                     (parent->type == XML_RELAXNG_ZEROORMORE))) {
+                    parent->type = XML_RELAXNG_EMPTY;
+                    break;
+                }
+                if ((parent != NULL) &&
+                    ((parent->type == XML_RELAXNG_GROUP) ||
+                     (parent->type == XML_RELAXNG_INTERLEAVE) ||
+                     (parent->type == XML_RELAXNG_CHOICE))) {
+                    prev = xmlRelaxNGTryUnlink(ctxt, cur, parent, prev);
+                } else
+                    prev = cur;
+            } else {
+                prev = cur;
+            }
+        }
+        cur = cur->next;
+    }
+}
+
+/**
+ * xmlRelaxNGGroupContentType:
+ * @ct1:  the first content type
+ * @ct2:  the second content type
+ *
+ * Try to group 2 content types
+ *
+ * Returns the content type
+ */
+static xmlRelaxNGContentType
+xmlRelaxNGGroupContentType(xmlRelaxNGContentType ct1,
+                           xmlRelaxNGContentType ct2)
+{
+    if ((ct1 == XML_RELAXNG_CONTENT_ERROR) ||
+        (ct2 == XML_RELAXNG_CONTENT_ERROR))
+        return (XML_RELAXNG_CONTENT_ERROR);
+    if (ct1 == XML_RELAXNG_CONTENT_EMPTY)
+        return (ct2);
+    if (ct2 == XML_RELAXNG_CONTENT_EMPTY)
+        return (ct1);
+    if ((ct1 == XML_RELAXNG_CONTENT_COMPLEX) &&
+        (ct2 == XML_RELAXNG_CONTENT_COMPLEX))
+        return (XML_RELAXNG_CONTENT_COMPLEX);
+    return (XML_RELAXNG_CONTENT_ERROR);
+}
+
+/**
+ * xmlRelaxNGMaxContentType:
+ * @ct1:  the first content type
+ * @ct2:  the second content type
+ *
+ * Compute the max content-type
+ *
+ * Returns the content type
+ */
+static xmlRelaxNGContentType
+xmlRelaxNGMaxContentType(xmlRelaxNGContentType ct1,
+                         xmlRelaxNGContentType ct2)
+{
+    if ((ct1 == XML_RELAXNG_CONTENT_ERROR) ||
+        (ct2 == XML_RELAXNG_CONTENT_ERROR))
+        return (XML_RELAXNG_CONTENT_ERROR);
+    if ((ct1 == XML_RELAXNG_CONTENT_SIMPLE) ||
+        (ct2 == XML_RELAXNG_CONTENT_SIMPLE))
+        return (XML_RELAXNG_CONTENT_SIMPLE);
+    if ((ct1 == XML_RELAXNG_CONTENT_COMPLEX) ||
+        (ct2 == XML_RELAXNG_CONTENT_COMPLEX))
+        return (XML_RELAXNG_CONTENT_COMPLEX);
+    return (XML_RELAXNG_CONTENT_EMPTY);
+}
+
+/**
+ * xmlRelaxNGCheckRules:
+ * @ctxt:  a Relax-NG parser context
+ * @cur:  the current definition
+ * @flags:  some accumulated flags
+ * @ptype:  the parent type
+ *
+ * Check for rules in section 7.1 and 7.2
+ *
+ * Returns the content type of @cur
+ */
+static xmlRelaxNGContentType
+xmlRelaxNGCheckRules(xmlRelaxNGParserCtxtPtr ctxt,
+                     xmlRelaxNGDefinePtr cur, int flags,
+                     xmlRelaxNGType ptype)
+{
+    int nflags;
+    xmlRelaxNGContentType ret, tmp, val = XML_RELAXNG_CONTENT_EMPTY;
+
+    while (cur != NULL) {
+        ret = XML_RELAXNG_CONTENT_EMPTY;
+        if ((cur->type == XML_RELAXNG_REF) ||
+            (cur->type == XML_RELAXNG_PARENTREF)) {
+           /*
+            * This should actually be caught by list//element(ref) at the
+            * element boundaries, c.f. Bug #159968 local refs are dropped
+            * in step 4.19.
+            */
+#if 0
+            if (flags & XML_RELAXNG_IN_LIST) {
+                xmlRngPErr(ctxt, cur->node, XML_RNGP_PAT_LIST_REF,
+                           "Found forbidden pattern list//ref\n", NULL,
+                           NULL);
+            }
+#endif
+            if (flags & XML_RELAXNG_IN_DATAEXCEPT) {
+                xmlRngPErr(ctxt, cur->node, XML_RNGP_PAT_DATA_EXCEPT_REF,
+                           "Found forbidden pattern data/except//ref\n",
+                           NULL, NULL);
+            }
+            if (cur->content == NULL) {
+                if (cur->type == XML_RELAXNG_PARENTREF)
+                    xmlRngPErr(ctxt, cur->node, XML_RNGP_REF_NO_DEF,
+                               "Internal found no define for parent refs\n",
+                               NULL, NULL);
+                else
+                    xmlRngPErr(ctxt, cur->node, XML_RNGP_REF_NO_DEF,
+                               "Internal found no define for ref %s\n",
+                               (cur->name ? cur->name: BAD_CAST "null"), NULL);
+            }
+            if (cur->depth > -4) {
+                cur->depth = -4;
+                ret = xmlRelaxNGCheckRules(ctxt, cur->content,
+                                           flags, cur->type);
+                cur->depth = ret - 15;
+            } else if (cur->depth == -4) {
+                ret = XML_RELAXNG_CONTENT_COMPLEX;
+            } else {
+                ret = (xmlRelaxNGContentType) (cur->depth + 15);
+            }
+        } else if (cur->type == XML_RELAXNG_ELEMENT) {
+            /*
+             * The 7.3 Attribute derivation rule for groups is plugged there
+             */
+            xmlRelaxNGCheckGroupAttrs(ctxt, cur);
+            if (flags & XML_RELAXNG_IN_DATAEXCEPT) {
+                xmlRngPErr(ctxt, cur->node, XML_RNGP_PAT_DATA_EXCEPT_ELEM,
+                           "Found forbidden pattern data/except//element(ref)\n",
+                           NULL, NULL);
+            }
+            if (flags & XML_RELAXNG_IN_LIST) {
+                xmlRngPErr(ctxt, cur->node, XML_RNGP_PAT_LIST_ELEM,
+                           "Found forbidden pattern list//element(ref)\n",
+                           NULL, NULL);
+            }
+            if (flags & XML_RELAXNG_IN_ATTRIBUTE) {
+                xmlRngPErr(ctxt, cur->node, XML_RNGP_PAT_ATTR_ELEM,
+                           "Found forbidden pattern attribute//element(ref)\n",
+                           NULL, NULL);
+            }
+            if (flags & XML_RELAXNG_IN_ATTRIBUTE) {
+                xmlRngPErr(ctxt, cur->node, XML_RNGP_PAT_ATTR_ELEM,
+                           "Found forbidden pattern attribute//element(ref)\n",
+                           NULL, NULL);
+            }
+            /*
+             * reset since in the simple form elements are only child
+             * of grammar/define
+             */
+            nflags = 0;
+            ret =
+                xmlRelaxNGCheckRules(ctxt, cur->attrs, nflags, cur->type);
+            if (ret != XML_RELAXNG_CONTENT_EMPTY) {
+                xmlRngPErr(ctxt, cur->node, XML_RNGP_ELEM_CONTENT_EMPTY,
+                           "Element %s attributes have a content type error\n",
+                           cur->name, NULL);
+            }
+            ret =
+                xmlRelaxNGCheckRules(ctxt, cur->content, nflags,
+                                     cur->type);
+            if (ret == XML_RELAXNG_CONTENT_ERROR) {
+                xmlRngPErr(ctxt, cur->node, XML_RNGP_ELEM_CONTENT_ERROR,
+                           "Element %s has a content type error\n",
+                           cur->name, NULL);
+            } else {
+                ret = XML_RELAXNG_CONTENT_COMPLEX;
+            }
+        } else if (cur->type == XML_RELAXNG_ATTRIBUTE) {
+            if (flags & XML_RELAXNG_IN_ATTRIBUTE) {
+                xmlRngPErr(ctxt, cur->node, XML_RNGP_PAT_ATTR_ATTR,
+                           "Found forbidden pattern attribute//attribute\n",
+                           NULL, NULL);
+            }
+            if (flags & XML_RELAXNG_IN_LIST) {
+                xmlRngPErr(ctxt, cur->node, XML_RNGP_PAT_LIST_ATTR,
+                           "Found forbidden pattern list//attribute\n",
+                           NULL, NULL);
+            }
+            if (flags & XML_RELAXNG_IN_OOMGROUP) {
+                xmlRngPErr(ctxt, cur->node, XML_RNGP_PAT_ONEMORE_GROUP_ATTR,
+                           "Found forbidden pattern oneOrMore//group//attribute\n",
+                           NULL, NULL);
+            }
+            if (flags & XML_RELAXNG_IN_OOMINTERLEAVE) {
+                xmlRngPErr(ctxt, cur->node, XML_RNGP_PAT_ONEMORE_INTERLEAVE_ATTR,
+                           "Found forbidden pattern oneOrMore//interleave//attribute\n",
+                           NULL, NULL);
+            }
+            if (flags & XML_RELAXNG_IN_DATAEXCEPT) {
+                xmlRngPErr(ctxt, cur->node, XML_RNGP_PAT_DATA_EXCEPT_ATTR,
+                           "Found forbidden pattern data/except//attribute\n",
+                           NULL, NULL);
+            }
+            if (flags & XML_RELAXNG_IN_START) {
+                xmlRngPErr(ctxt, cur->node, XML_RNGP_PAT_START_ATTR,
+                           "Found forbidden pattern start//attribute\n",
+                           NULL, NULL);
+            }
+            if ((!(flags & XML_RELAXNG_IN_ONEORMORE))
+                && (cur->name == NULL)) {
+                if (cur->ns == NULL) {
+                    xmlRngPErr(ctxt, cur->node, XML_RNGP_ANYNAME_ATTR_ANCESTOR,
+                               "Found anyName attribute without oneOrMore ancestor\n",
+                               NULL, NULL);
+                } else {
+                    xmlRngPErr(ctxt, cur->node, XML_RNGP_NSNAME_ATTR_ANCESTOR,
+                               "Found nsName attribute without oneOrMore ancestor\n",
+                               NULL, NULL);
+                }
+            }
+            nflags = flags | XML_RELAXNG_IN_ATTRIBUTE;
+            xmlRelaxNGCheckRules(ctxt, cur->content, nflags, cur->type);
+            ret = XML_RELAXNG_CONTENT_EMPTY;
+        } else if ((cur->type == XML_RELAXNG_ONEORMORE) ||
+                   (cur->type == XML_RELAXNG_ZEROORMORE)) {
+            if (flags & XML_RELAXNG_IN_DATAEXCEPT) {
+                xmlRngPErr(ctxt, cur->node, XML_RNGP_PAT_DATA_EXCEPT_ONEMORE,
+                           "Found forbidden pattern data/except//oneOrMore\n",
+                           NULL, NULL);
+            }
+            if (flags & XML_RELAXNG_IN_START) {
+                xmlRngPErr(ctxt, cur->node, XML_RNGP_PAT_START_ONEMORE,
+                           "Found forbidden pattern start//oneOrMore\n",
+                           NULL, NULL);
+            }
+            nflags = flags | XML_RELAXNG_IN_ONEORMORE;
+            ret =
+                xmlRelaxNGCheckRules(ctxt, cur->content, nflags,
+                                     cur->type);
+            ret = xmlRelaxNGGroupContentType(ret, ret);
+        } else if (cur->type == XML_RELAXNG_LIST) {
+            if (flags & XML_RELAXNG_IN_LIST) {
+                xmlRngPErr(ctxt, cur->node, XML_RNGP_PAT_LIST_LIST,
+                           "Found forbidden pattern list//list\n", NULL,
+                           NULL);
+            }
+            if (flags & XML_RELAXNG_IN_DATAEXCEPT) {
+                xmlRngPErr(ctxt, cur->node, XML_RNGP_PAT_DATA_EXCEPT_LIST,
+                           "Found forbidden pattern data/except//list\n",
+                           NULL, NULL);
+            }
+            if (flags & XML_RELAXNG_IN_START) {
+                xmlRngPErr(ctxt, cur->node, XML_RNGP_PAT_START_LIST,
+                           "Found forbidden pattern start//list\n", NULL,
+                           NULL);
+            }
+            nflags = flags | XML_RELAXNG_IN_LIST;
+            ret =
+                xmlRelaxNGCheckRules(ctxt, cur->content, nflags,
+                                     cur->type);
+        } else if (cur->type == XML_RELAXNG_GROUP) {
+            if (flags & XML_RELAXNG_IN_DATAEXCEPT) {
+                xmlRngPErr(ctxt, cur->node, XML_RNGP_PAT_DATA_EXCEPT_GROUP,
+                           "Found forbidden pattern data/except//group\n",
+                           NULL, NULL);
+            }
+            if (flags & XML_RELAXNG_IN_START) {
+                xmlRngPErr(ctxt, cur->node, XML_RNGP_PAT_START_GROUP,
+                           "Found forbidden pattern start//group\n", NULL,
+                           NULL);
+            }
+            if (flags & XML_RELAXNG_IN_ONEORMORE)
+                nflags = flags | XML_RELAXNG_IN_OOMGROUP;
+            else
+                nflags = flags;
+            ret =
+                xmlRelaxNGCheckRules(ctxt, cur->content, nflags,
+                                     cur->type);
+            /*
+             * The 7.3 Attribute derivation rule for groups is plugged there
+             */
+            xmlRelaxNGCheckGroupAttrs(ctxt, cur);
+        } else if (cur->type == XML_RELAXNG_INTERLEAVE) {
+            if (flags & XML_RELAXNG_IN_LIST) {
+                xmlRngPErr(ctxt, cur->node, XML_RNGP_PAT_LIST_INTERLEAVE,
+                           "Found forbidden pattern list//interleave\n",
+                           NULL, NULL);
+            }
+            if (flags & XML_RELAXNG_IN_DATAEXCEPT) {
+                xmlRngPErr(ctxt, cur->node, XML_RNGP_PAT_DATA_EXCEPT_INTERLEAVE,
+                           "Found forbidden pattern data/except//interleave\n",
+                           NULL, NULL);
+            }
+            if (flags & XML_RELAXNG_IN_START) {
+                xmlRngPErr(ctxt, cur->node, XML_RNGP_PAT_DATA_EXCEPT_INTERLEAVE,
+                           "Found forbidden pattern start//interleave\n",
+                           NULL, NULL);
+            }
+            if (flags & XML_RELAXNG_IN_ONEORMORE)
+                nflags = flags | XML_RELAXNG_IN_OOMINTERLEAVE;
+            else
+                nflags = flags;
+            ret =
+                xmlRelaxNGCheckRules(ctxt, cur->content, nflags,
+                                     cur->type);
+        } else if (cur->type == XML_RELAXNG_EXCEPT) {
+            if ((cur->parent != NULL) &&
+                (cur->parent->type == XML_RELAXNG_DATATYPE))
+                nflags = flags | XML_RELAXNG_IN_DATAEXCEPT;
+            else
+                nflags = flags;
+            ret =
+                xmlRelaxNGCheckRules(ctxt, cur->content, nflags,
+                                     cur->type);
+        } else if (cur->type == XML_RELAXNG_DATATYPE) {
+            if (flags & XML_RELAXNG_IN_START) {
+                xmlRngPErr(ctxt, cur->node, XML_RNGP_PAT_START_DATA,
+                           "Found forbidden pattern start//data\n", NULL,
+                           NULL);
+            }
+            xmlRelaxNGCheckRules(ctxt, cur->content, flags, cur->type);
+            ret = XML_RELAXNG_CONTENT_SIMPLE;
+        } else if (cur->type == XML_RELAXNG_VALUE) {
+            if (flags & XML_RELAXNG_IN_START) {
+                xmlRngPErr(ctxt, cur->node, XML_RNGP_PAT_START_VALUE,
+                           "Found forbidden pattern start//value\n", NULL,
+                           NULL);
+            }
+            xmlRelaxNGCheckRules(ctxt, cur->content, flags, cur->type);
+            ret = XML_RELAXNG_CONTENT_SIMPLE;
+        } else if (cur->type == XML_RELAXNG_TEXT) {
+            if (flags & XML_RELAXNG_IN_LIST) {
+                xmlRngPErr(ctxt, cur->node, XML_RNGP_PAT_LIST_TEXT,
+                           "Found forbidden pattern list//text\n", NULL,
+                           NULL);
+            }
+            if (flags & XML_RELAXNG_IN_DATAEXCEPT) {
+                xmlRngPErr(ctxt, cur->node, XML_RNGP_PAT_DATA_EXCEPT_TEXT,
+                           "Found forbidden pattern data/except//text\n",
+                           NULL, NULL);
+            }
+            if (flags & XML_RELAXNG_IN_START) {
+                xmlRngPErr(ctxt, cur->node, XML_RNGP_PAT_START_TEXT,
+                           "Found forbidden pattern start//text\n", NULL,
+                           NULL);
+            }
+            ret = XML_RELAXNG_CONTENT_COMPLEX;
+        } else if (cur->type == XML_RELAXNG_EMPTY) {
+            if (flags & XML_RELAXNG_IN_DATAEXCEPT) {
+                xmlRngPErr(ctxt, cur->node, XML_RNGP_PAT_DATA_EXCEPT_EMPTY,
+                           "Found forbidden pattern data/except//empty\n",
+                           NULL, NULL);
+            }
+            if (flags & XML_RELAXNG_IN_START) {
+                xmlRngPErr(ctxt, cur->node, XML_RNGP_PAT_START_EMPTY,
+                           "Found forbidden pattern start//empty\n", NULL,
+                           NULL);
+            }
+            ret = XML_RELAXNG_CONTENT_EMPTY;
+        } else if (cur->type == XML_RELAXNG_CHOICE) {
+            xmlRelaxNGCheckChoiceDeterminism(ctxt, cur);
+            ret =
+                xmlRelaxNGCheckRules(ctxt, cur->content, flags, cur->type);
+        } else {
+            ret =
+                xmlRelaxNGCheckRules(ctxt, cur->content, flags, cur->type);
+        }
+        cur = cur->next;
+        if (ptype == XML_RELAXNG_GROUP) {
+            val = xmlRelaxNGGroupContentType(val, ret);
+        } else if (ptype == XML_RELAXNG_INTERLEAVE) {
+            /*
+             * TODO: scan complain that tmp is never used, seems on purpose
+             *       need double-checking
+             */
+            tmp = xmlRelaxNGGroupContentType(val, ret);
+            if (tmp != XML_RELAXNG_CONTENT_ERROR)
+                tmp = xmlRelaxNGMaxContentType(val, ret);
+        } else if (ptype == XML_RELAXNG_CHOICE) {
+            val = xmlRelaxNGMaxContentType(val, ret);
+        } else if (ptype == XML_RELAXNG_LIST) {
+            val = XML_RELAXNG_CONTENT_SIMPLE;
+        } else if (ptype == XML_RELAXNG_EXCEPT) {
+            if (ret == XML_RELAXNG_CONTENT_ERROR)
+                val = XML_RELAXNG_CONTENT_ERROR;
+            else
+                val = XML_RELAXNG_CONTENT_SIMPLE;
+        } else {
+            val = xmlRelaxNGGroupContentType(val, ret);
+        }
+
+    }
+    return (val);
+}
+
+/**
+ * xmlRelaxNGParseGrammar:
+ * @ctxt:  a Relax-NG parser context
+ * @nodes:  grammar children nodes
+ *
+ * parse a Relax-NG <grammar> node
+ *
+ * Returns the internal xmlRelaxNGGrammarPtr built or
+ *         NULL in case of error
+ */
+static xmlRelaxNGGrammarPtr
+xmlRelaxNGParseGrammar(xmlRelaxNGParserCtxtPtr ctxt, xmlNodePtr nodes)
+{
+    xmlRelaxNGGrammarPtr ret, tmp, old;
+
+#ifdef DEBUG_GRAMMAR
+    xmlGenericError(xmlGenericErrorContext, "Parsing a new grammar\n");
+#endif
+
+    ret = xmlRelaxNGNewGrammar(ctxt);
+    if (ret == NULL)
+        return (NULL);
+
+    /*
+     * Link the new grammar in the tree
+     */
+    ret->parent = ctxt->grammar;
+    if (ctxt->grammar != NULL) {
+        tmp = ctxt->grammar->children;
+        if (tmp == NULL) {
+            ctxt->grammar->children = ret;
+        } else {
+            while (tmp->next != NULL)
+                tmp = tmp->next;
+            tmp->next = ret;
+        }
+    }
+
+    old = ctxt->grammar;
+    ctxt->grammar = ret;
+    xmlRelaxNGParseGrammarContent(ctxt, nodes);
+    ctxt->grammar = ret;
+    if (ctxt->grammar == NULL) {
+        xmlRngPErr(ctxt, nodes, XML_RNGP_GRAMMAR_CONTENT,
+                   "Failed to parse <grammar> content\n", NULL, NULL);
+    } else if (ctxt->grammar->start == NULL) {
+        xmlRngPErr(ctxt, nodes, XML_RNGP_GRAMMAR_NO_START,
+                   "Element <grammar> has no <start>\n", NULL, NULL);
+    }
+
+    /*
+     * Apply 4.17 merging rules to defines and starts
+     */
+    xmlRelaxNGCombineStart(ctxt, ret);
+    if (ret->defs != NULL) {
+        xmlHashScan(ret->defs, (xmlHashScanner) xmlRelaxNGCheckCombine,
+                    ctxt);
+    }
+
+    /*
+     * link together defines and refs in this grammar
+     */
+    if (ret->refs != NULL) {
+        xmlHashScan(ret->refs, (xmlHashScanner) xmlRelaxNGCheckReference,
+                    ctxt);
+    }
+
+
+    /* @@@@ */
+
+    ctxt->grammar = old;
+    return (ret);
+}
+
+/**
+ * xmlRelaxNGParseDocument:
+ * @ctxt:  a Relax-NG parser context
+ * @node:  the root node of the RelaxNG schema
+ *
+ * parse a Relax-NG definition resource and build an internal
+ * xmlRelaxNG struture which can be used to validate instances.
+ *
+ * Returns the internal XML RelaxNG structure built or
+ *         NULL in case of error
+ */
+static xmlRelaxNGPtr
+xmlRelaxNGParseDocument(xmlRelaxNGParserCtxtPtr ctxt, xmlNodePtr node)
+{
+    xmlRelaxNGPtr schema = NULL;
+    const xmlChar *olddefine;
+    xmlRelaxNGGrammarPtr old;
+
+    if ((ctxt == NULL) || (node == NULL))
+        return (NULL);
+
+    schema = xmlRelaxNGNewRelaxNG(ctxt);
+    if (schema == NULL)
+        return (NULL);
+
+    olddefine = ctxt->define;
+    ctxt->define = NULL;
+    if (IS_RELAXNG(node, "grammar")) {
+        schema->topgrammar = xmlRelaxNGParseGrammar(ctxt, node->children);
+        if (schema->topgrammar == NULL) {
+            xmlRelaxNGFree(schema);
+            return (NULL);
+        }
+    } else {
+        xmlRelaxNGGrammarPtr tmp, ret;
+
+        schema->topgrammar = ret = xmlRelaxNGNewGrammar(ctxt);
+        if (schema->topgrammar == NULL) {
+            xmlRelaxNGFree(schema);
+            return (NULL);
+        }
+        /*
+         * Link the new grammar in the tree
+         */
+        ret->parent = ctxt->grammar;
+        if (ctxt->grammar != NULL) {
+            tmp = ctxt->grammar->children;
+            if (tmp == NULL) {
+                ctxt->grammar->children = ret;
+            } else {
+                while (tmp->next != NULL)
+                    tmp = tmp->next;
+                tmp->next = ret;
+            }
+        }
+        old = ctxt->grammar;
+        ctxt->grammar = ret;
+        xmlRelaxNGParseStart(ctxt, node);
+        if (old != NULL)
+            ctxt->grammar = old;
+    }
+    ctxt->define = olddefine;
+    if (schema->topgrammar->start != NULL) {
+        xmlRelaxNGCheckCycles(ctxt, schema->topgrammar->start, 0);
+        if ((ctxt->flags & XML_RELAXNG_IN_EXTERNALREF) == 0) {
+            xmlRelaxNGSimplify(ctxt, schema->topgrammar->start, NULL);
+            while ((schema->topgrammar->start != NULL) &&
+                   (schema->topgrammar->start->type == XML_RELAXNG_NOOP) &&
+                   (schema->topgrammar->start->next != NULL))
+                schema->topgrammar->start =
+                    schema->topgrammar->start->content;
+            xmlRelaxNGCheckRules(ctxt, schema->topgrammar->start,
+                                 XML_RELAXNG_IN_START, XML_RELAXNG_NOOP);
+        }
+    }
+#ifdef DEBUG
+    if (schema == NULL)
+        xmlGenericError(xmlGenericErrorContext,
+                        "xmlRelaxNGParseDocument() failed\n");
+#endif
+
+    return (schema);
+}
+
+/************************************************************************
+ *									*
+ *			Reading RelaxNGs				*
+ *									*
+ ************************************************************************/
+
+/**
+ * xmlRelaxNGNewParserCtxt:
+ * @URL:  the location of the schema
+ *
+ * Create an XML RelaxNGs parse context for that file/resource expected
+ * to contain an XML RelaxNGs file.
+ *
+ * Returns the parser context or NULL in case of error
+ */
+xmlRelaxNGParserCtxtPtr
+xmlRelaxNGNewParserCtxt(const char *URL)
+{
+    xmlRelaxNGParserCtxtPtr ret;
+
+    if (URL == NULL)
+        return (NULL);
+
+    ret =
+        (xmlRelaxNGParserCtxtPtr) xmlMalloc(sizeof(xmlRelaxNGParserCtxt));
+    if (ret == NULL) {
+        xmlRngPErrMemory(NULL, "building parser\n");
+        return (NULL);
+    }
+    memset(ret, 0, sizeof(xmlRelaxNGParserCtxt));
+    ret->URL = xmlStrdup((const xmlChar *) URL);
+    ret->error = xmlGenericError;
+    ret->userData = xmlGenericErrorContext;
+    return (ret);
+}
+
+/**
+ * xmlRelaxNGNewMemParserCtxt:
+ * @buffer:  a pointer to a char array containing the schemas
+ * @size:  the size of the array
+ *
+ * Create an XML RelaxNGs parse context for that memory buffer expected
+ * to contain an XML RelaxNGs file.
+ *
+ * Returns the parser context or NULL in case of error
+ */
+xmlRelaxNGParserCtxtPtr
+xmlRelaxNGNewMemParserCtxt(const char *buffer, int size)
+{
+    xmlRelaxNGParserCtxtPtr ret;
+
+    if ((buffer == NULL) || (size <= 0))
+        return (NULL);
+
+    ret =
+        (xmlRelaxNGParserCtxtPtr) xmlMalloc(sizeof(xmlRelaxNGParserCtxt));
+    if (ret == NULL) {
+        xmlRngPErrMemory(NULL, "building parser\n");
+        return (NULL);
+    }
+    memset(ret, 0, sizeof(xmlRelaxNGParserCtxt));
+    ret->buffer = buffer;
+    ret->size = size;
+    ret->error = xmlGenericError;
+    ret->userData = xmlGenericErrorContext;
+    return (ret);
+}
+
+/**
+ * xmlRelaxNGNewDocParserCtxt:
+ * @doc:  a preparsed document tree
+ *
+ * Create an XML RelaxNGs parser context for that document.
+ * Note: since the process of compiling a RelaxNG schemas modifies the
+ *       document, the @doc parameter is duplicated internally.
+ *
+ * Returns the parser context or NULL in case of error
+ */
+xmlRelaxNGParserCtxtPtr
+xmlRelaxNGNewDocParserCtxt(xmlDocPtr doc)
+{
+    xmlRelaxNGParserCtxtPtr ret;
+    xmlDocPtr copy;
+
+    if (doc == NULL)
+        return (NULL);
+    copy = xmlCopyDoc(doc, 1);
+    if (copy == NULL)
+        return (NULL);
+
+    ret =
+        (xmlRelaxNGParserCtxtPtr) xmlMalloc(sizeof(xmlRelaxNGParserCtxt));
+    if (ret == NULL) {
+        xmlRngPErrMemory(NULL, "building parser\n");
+        return (NULL);
+    }
+    memset(ret, 0, sizeof(xmlRelaxNGParserCtxt));
+    ret->document = copy;
+    ret->freedoc = 1;
+    ret->userData = xmlGenericErrorContext;
+    return (ret);
+}
+
+/**
+ * xmlRelaxNGFreeParserCtxt:
+ * @ctxt:  the schema parser context
+ *
+ * Free the resources associated to the schema parser context
+ */
+void
+xmlRelaxNGFreeParserCtxt(xmlRelaxNGParserCtxtPtr ctxt)
+{
+    if (ctxt == NULL)
+        return;
+    if (ctxt->URL != NULL)
+        xmlFree(ctxt->URL);
+    if (ctxt->doc != NULL)
+        xmlRelaxNGFreeDocument(ctxt->doc);
+    if (ctxt->interleaves != NULL)
+        xmlHashFree(ctxt->interleaves, NULL);
+    if (ctxt->documents != NULL)
+        xmlRelaxNGFreeDocumentList(ctxt->documents);
+    if (ctxt->includes != NULL)
+        xmlRelaxNGFreeIncludeList(ctxt->includes);
+    if (ctxt->docTab != NULL)
+        xmlFree(ctxt->docTab);
+    if (ctxt->incTab != NULL)
+        xmlFree(ctxt->incTab);
+    if (ctxt->defTab != NULL) {
+        int i;
+
+        for (i = 0; i < ctxt->defNr; i++)
+            xmlRelaxNGFreeDefine(ctxt->defTab[i]);
+        xmlFree(ctxt->defTab);
+    }
+    if ((ctxt->document != NULL) && (ctxt->freedoc))
+        xmlFreeDoc(ctxt->document);
+    xmlFree(ctxt);
+}
+
+/**
+ * xmlRelaxNGNormExtSpace:
+ * @value:  a value
+ *
+ * Removes the leading and ending spaces of the value
+ * The string is modified "in situ"
+ */
+static void
+xmlRelaxNGNormExtSpace(xmlChar * value)
+{
+    xmlChar *start = value;
+    xmlChar *cur = value;
+
+    if (value == NULL)
+        return;
+
+    while (IS_BLANK_CH(*cur))
+        cur++;
+    if (cur == start) {
+        do {
+            while ((*cur != 0) && (!IS_BLANK_CH(*cur)))
+                cur++;
+            if (*cur == 0)
+                return;
+            start = cur;
+            while (IS_BLANK_CH(*cur))
+                cur++;
+            if (*cur == 0) {
+                *start = 0;
+                return;
+            }
+        } while (1);
+    } else {
+        do {
+            while ((*cur != 0) && (!IS_BLANK_CH(*cur)))
+                *start++ = *cur++;
+            if (*cur == 0) {
+                *start = 0;
+                return;
+            }
+            /* don't try to normalize the inner spaces */
+            while (IS_BLANK_CH(*cur))
+                cur++;
+            if (*cur == 0) {
+                *start = 0;
+                return;
+            }
+            *start++ = *cur++;
+        } while (1);
+    }
+}
+
+/**
+ * xmlRelaxNGCleanupAttributes:
+ * @ctxt:  a Relax-NG parser context
+ * @node:  a Relax-NG node
+ *
+ * Check all the attributes on the given node
+ */
+static void
+xmlRelaxNGCleanupAttributes(xmlRelaxNGParserCtxtPtr ctxt, xmlNodePtr node)
+{
+    xmlAttrPtr cur, next;
+
+    cur = node->properties;
+    while (cur != NULL) {
+        next = cur->next;
+        if ((cur->ns == NULL) ||
+            (xmlStrEqual(cur->ns->href, xmlRelaxNGNs))) {
+            if (xmlStrEqual(cur->name, BAD_CAST "name")) {
+                if ((!xmlStrEqual(node->name, BAD_CAST "element")) &&
+                    (!xmlStrEqual(node->name, BAD_CAST "attribute")) &&
+                    (!xmlStrEqual(node->name, BAD_CAST "ref")) &&
+                    (!xmlStrEqual(node->name, BAD_CAST "parentRef")) &&
+                    (!xmlStrEqual(node->name, BAD_CAST "param")) &&
+                    (!xmlStrEqual(node->name, BAD_CAST "define"))) {
+                    xmlRngPErr(ctxt, node, XML_RNGP_FORBIDDEN_ATTRIBUTE,
+                               "Attribute %s is not allowed on %s\n",
+                               cur->name, node->name);
+                }
+            } else if (xmlStrEqual(cur->name, BAD_CAST "type")) {
+                if ((!xmlStrEqual(node->name, BAD_CAST "value")) &&
+                    (!xmlStrEqual(node->name, BAD_CAST "data"))) {
+                    xmlRngPErr(ctxt, node, XML_RNGP_FORBIDDEN_ATTRIBUTE,
+                               "Attribute %s is not allowed on %s\n",
+                               cur->name, node->name);
+                }
+            } else if (xmlStrEqual(cur->name, BAD_CAST "href")) {
+                if ((!xmlStrEqual(node->name, BAD_CAST "externalRef")) &&
+                    (!xmlStrEqual(node->name, BAD_CAST "include"))) {
+                    xmlRngPErr(ctxt, node, XML_RNGP_FORBIDDEN_ATTRIBUTE,
+                               "Attribute %s is not allowed on %s\n",
+                               cur->name, node->name);
+                }
+            } else if (xmlStrEqual(cur->name, BAD_CAST "combine")) {
+                if ((!xmlStrEqual(node->name, BAD_CAST "start")) &&
+                    (!xmlStrEqual(node->name, BAD_CAST "define"))) {
+                    xmlRngPErr(ctxt, node, XML_RNGP_FORBIDDEN_ATTRIBUTE,
+                               "Attribute %s is not allowed on %s\n",
+                               cur->name, node->name);
+                }
+            } else if (xmlStrEqual(cur->name, BAD_CAST "datatypeLibrary")) {
+                xmlChar *val;
+                xmlURIPtr uri;
+
+                val = xmlNodeListGetString(node->doc, cur->children, 1);
+                if (val != NULL) {
+                    if (val[0] != 0) {
+                        uri = xmlParseURI((const char *) val);
+                        if (uri == NULL) {
+                            xmlRngPErr(ctxt, node, XML_RNGP_INVALID_URI,
+                                       "Attribute %s contains invalid URI %s\n",
+                                       cur->name, val);
+                        } else {
+                            if (uri->scheme == NULL) {
+                                xmlRngPErr(ctxt, node, XML_RNGP_URI_NOT_ABSOLUTE,
+                                           "Attribute %s URI %s is not absolute\n",
+                                           cur->name, val);
+                            }
+                            if (uri->fragment != NULL) {
+                                xmlRngPErr(ctxt, node, XML_RNGP_URI_FRAGMENT,
+                                           "Attribute %s URI %s has a fragment ID\n",
+                                           cur->name, val);
+                            }
+                            xmlFreeURI(uri);
+                        }
+                    }
+                    xmlFree(val);
+                }
+            } else if (!xmlStrEqual(cur->name, BAD_CAST "ns")) {
+                xmlRngPErr(ctxt, node, XML_RNGP_UNKNOWN_ATTRIBUTE,
+                           "Unknown attribute %s on %s\n", cur->name,
+                           node->name);
+            }
+        }
+        cur = next;
+    }
+}
+
+/**
+ * xmlRelaxNGCleanupTree:
+ * @ctxt:  a Relax-NG parser context
+ * @root:  an xmlNodePtr subtree
+ *
+ * Cleanup the subtree from unwanted nodes for parsing, resolve
+ * Include and externalRef lookups.
+ */
+static void
+xmlRelaxNGCleanupTree(xmlRelaxNGParserCtxtPtr ctxt, xmlNodePtr root)
+{
+    xmlNodePtr cur, delete;
+
+    delete = NULL;
+    cur = root;
+    while (cur != NULL) {
+        if (delete != NULL) {
+            xmlUnlinkNode(delete);
+            xmlFreeNode(delete);
+            delete = NULL;
+        }
+        if (cur->type == XML_ELEMENT_NODE) {
+            /*
+             * Simplification 4.1. Annotations
+             */
+            if ((cur->ns == NULL) ||
+                (!xmlStrEqual(cur->ns->href, xmlRelaxNGNs))) {
+                if ((cur->parent != NULL) &&
+                    (cur->parent->type == XML_ELEMENT_NODE) &&
+                    ((xmlStrEqual(cur->parent->name, BAD_CAST "name")) ||
+                     (xmlStrEqual(cur->parent->name, BAD_CAST "value")) ||
+                     (xmlStrEqual(cur->parent->name, BAD_CAST "param")))) {
+                    xmlRngPErr(ctxt, cur, XML_RNGP_FOREIGN_ELEMENT,
+                               "element %s doesn't allow foreign elements\n",
+                               cur->parent->name, NULL);
+                }
+                delete = cur;
+                goto skip_children;
+            } else {
+                xmlRelaxNGCleanupAttributes(ctxt, cur);
+                if (xmlStrEqual(cur->name, BAD_CAST "externalRef")) {
+                    xmlChar *href, *ns, *base, *URL;
+                    xmlRelaxNGDocumentPtr docu;
+                    xmlNodePtr tmp;
+		    xmlURIPtr uri;
+
+                    ns = xmlGetProp(cur, BAD_CAST "ns");
+                    if (ns == NULL) {
+                        tmp = cur->parent;
+                        while ((tmp != NULL) &&
+                               (tmp->type == XML_ELEMENT_NODE)) {
+                            ns = xmlGetProp(tmp, BAD_CAST "ns");
+                            if (ns != NULL)
+                                break;
+                            tmp = tmp->parent;
+                        }
+                    }
+                    href = xmlGetProp(cur, BAD_CAST "href");
+                    if (href == NULL) {
+                        xmlRngPErr(ctxt, cur, XML_RNGP_MISSING_HREF,
+                                   "xmlRelaxNGParse: externalRef has no href attribute\n",
+                                   NULL, NULL);
+                        if (ns != NULL)
+                            xmlFree(ns);
+                        delete = cur;
+                        goto skip_children;
+                    }
+		    uri = xmlParseURI((const char *) href);
+		    if (uri == NULL) {
+                        xmlRngPErr(ctxt, cur, XML_RNGP_HREF_ERROR,
+                                   "Incorrect URI for externalRef %s\n",
+                                   href, NULL);
+                        if (ns != NULL)
+                            xmlFree(ns);
+                        if (href != NULL)
+                            xmlFree(href);
+                        delete = cur;
+                        goto skip_children;
+		    }
+		    if (uri->fragment != NULL) {
+                        xmlRngPErr(ctxt, cur, XML_RNGP_HREF_ERROR,
+			       "Fragment forbidden in URI for externalRef %s\n",
+                                   href, NULL);
+                        if (ns != NULL)
+                            xmlFree(ns);
+		        xmlFreeURI(uri);
+                        if (href != NULL)
+                            xmlFree(href);
+                        delete = cur;
+                        goto skip_children;
+		    }
+		    xmlFreeURI(uri);
+                    base = xmlNodeGetBase(cur->doc, cur);
+                    URL = xmlBuildURI(href, base);
+                    if (URL == NULL) {
+                        xmlRngPErr(ctxt, cur, XML_RNGP_HREF_ERROR,
+                                   "Failed to compute URL for externalRef %s\n",
+                                   href, NULL);
+                        if (ns != NULL)
+                            xmlFree(ns);
+                        if (href != NULL)
+                            xmlFree(href);
+                        if (base != NULL)
+                            xmlFree(base);
+                        delete = cur;
+                        goto skip_children;
+                    }
+                    if (href != NULL)
+                        xmlFree(href);
+                    if (base != NULL)
+                        xmlFree(base);
+                    docu = xmlRelaxNGLoadExternalRef(ctxt, URL, ns);
+                    if (docu == NULL) {
+                        xmlRngPErr(ctxt, cur, XML_RNGP_EXTERNAL_REF_FAILURE,
+                                   "Failed to load externalRef %s\n", URL,
+                                   NULL);
+                        if (ns != NULL)
+                            xmlFree(ns);
+                        xmlFree(URL);
+                        delete = cur;
+                        goto skip_children;
+                    }
+                    if (ns != NULL)
+                        xmlFree(ns);
+                    xmlFree(URL);
+                    cur->psvi = docu;
+                } else if (xmlStrEqual(cur->name, BAD_CAST "include")) {
+                    xmlChar *href, *ns, *base, *URL;
+                    xmlRelaxNGIncludePtr incl;
+                    xmlNodePtr tmp;
+
+                    href = xmlGetProp(cur, BAD_CAST "href");
+                    if (href == NULL) {
+                        xmlRngPErr(ctxt, cur, XML_RNGP_MISSING_HREF,
+                                   "xmlRelaxNGParse: include has no href attribute\n",
+                                   NULL, NULL);
+                        delete = cur;
+                        goto skip_children;
+                    }
+                    base = xmlNodeGetBase(cur->doc, cur);
+                    URL = xmlBuildURI(href, base);
+                    if (URL == NULL) {
+                        xmlRngPErr(ctxt, cur, XML_RNGP_HREF_ERROR,
+                                   "Failed to compute URL for include %s\n",
+                                   href, NULL);
+                        if (href != NULL)
+                            xmlFree(href);
+                        if (base != NULL)
+                            xmlFree(base);
+                        delete = cur;
+                        goto skip_children;
+                    }
+                    if (href != NULL)
+                        xmlFree(href);
+                    if (base != NULL)
+                        xmlFree(base);
+                    ns = xmlGetProp(cur, BAD_CAST "ns");
+                    if (ns == NULL) {
+                        tmp = cur->parent;
+                        while ((tmp != NULL) &&
+                               (tmp->type == XML_ELEMENT_NODE)) {
+                            ns = xmlGetProp(tmp, BAD_CAST "ns");
+                            if (ns != NULL)
+                                break;
+                            tmp = tmp->parent;
+                        }
+                    }
+                    incl = xmlRelaxNGLoadInclude(ctxt, URL, cur, ns);
+                    if (ns != NULL)
+                        xmlFree(ns);
+                    if (incl == NULL) {
+                        xmlRngPErr(ctxt, cur, XML_RNGP_INCLUDE_FAILURE,
+                                   "Failed to load include %s\n", URL,
+                                   NULL);
+                        xmlFree(URL);
+                        delete = cur;
+                        goto skip_children;
+                    }
+                    xmlFree(URL);
+                    cur->psvi = incl;
+                } else if ((xmlStrEqual(cur->name, BAD_CAST "element")) ||
+                           (xmlStrEqual(cur->name, BAD_CAST "attribute")))
+                {
+                    xmlChar *name, *ns;
+                    xmlNodePtr text = NULL;
+
+                    /*
+                     * Simplification 4.8. name attribute of element
+                     * and attribute elements
+                     */
+                    name = xmlGetProp(cur, BAD_CAST "name");
+                    if (name != NULL) {
+                        if (cur->children == NULL) {
+                            text =
+                                xmlNewChild(cur, cur->ns, BAD_CAST "name",
+                                            name);
+                        } else {
+                            xmlNodePtr node;
+
+                            node = xmlNewDocNode(cur->doc, cur->ns,
+			                         BAD_CAST "name", NULL);
+                            if (node != NULL) {
+                                xmlAddPrevSibling(cur->children, node);
+                                text = xmlNewText(name);
+                                xmlAddChild(node, text);
+                                text = node;
+                            }
+                        }
+                        if (text == NULL) {
+                            xmlRngPErr(ctxt, cur, XML_RNGP_CREATE_FAILURE,
+                                       "Failed to create a name %s element\n",
+                                       name, NULL);
+                        }
+                        xmlUnsetProp(cur, BAD_CAST "name");
+                        xmlFree(name);
+                        ns = xmlGetProp(cur, BAD_CAST "ns");
+                        if (ns != NULL) {
+                            if (text != NULL) {
+                                xmlSetProp(text, BAD_CAST "ns", ns);
+                                /* xmlUnsetProp(cur, BAD_CAST "ns"); */
+                            }
+                            xmlFree(ns);
+                        } else if (xmlStrEqual(cur->name,
+                                               BAD_CAST "attribute")) {
+                            xmlSetProp(text, BAD_CAST "ns", BAD_CAST "");
+                        }
+                    }
+                } else if ((xmlStrEqual(cur->name, BAD_CAST "name")) ||
+                           (xmlStrEqual(cur->name, BAD_CAST "nsName")) ||
+                           (xmlStrEqual(cur->name, BAD_CAST "value"))) {
+                    /*
+                     * Simplification 4.8. name attribute of element
+                     * and attribute elements
+                     */
+                    if (xmlHasProp(cur, BAD_CAST "ns") == NULL) {
+                        xmlNodePtr node;
+                        xmlChar *ns = NULL;
+
+                        node = cur->parent;
+                        while ((node != NULL) &&
+                               (node->type == XML_ELEMENT_NODE)) {
+                            ns = xmlGetProp(node, BAD_CAST "ns");
+                            if (ns != NULL) {
+                                break;
+                            }
+                            node = node->parent;
+                        }
+                        if (ns == NULL) {
+                            xmlSetProp(cur, BAD_CAST "ns", BAD_CAST "");
+                        } else {
+                            xmlSetProp(cur, BAD_CAST "ns", ns);
+                            xmlFree(ns);
+                        }
+                    }
+                    if (xmlStrEqual(cur->name, BAD_CAST "name")) {
+                        xmlChar *name, *local, *prefix;
+
+                        /*
+                         * Simplification: 4.10. QNames
+                         */
+                        name = xmlNodeGetContent(cur);
+                        if (name != NULL) {
+                            local = xmlSplitQName2(name, &prefix);
+                            if (local != NULL) {
+                                xmlNsPtr ns;
+
+                                ns = xmlSearchNs(cur->doc, cur, prefix);
+                                if (ns == NULL) {
+                                    xmlRngPErr(ctxt, cur,
+                                               XML_RNGP_PREFIX_UNDEFINED,
+                                               "xmlRelaxNGParse: no namespace for prefix %s\n",
+                                               prefix, NULL);
+                                } else {
+                                    xmlSetProp(cur, BAD_CAST "ns",
+                                               ns->href);
+                                    xmlNodeSetContent(cur, local);
+                                }
+                                xmlFree(local);
+                                xmlFree(prefix);
+                            }
+                            xmlFree(name);
+                        }
+                    }
+                    /*
+                     * 4.16
+                     */
+                    if (xmlStrEqual(cur->name, BAD_CAST "nsName")) {
+                        if (ctxt->flags & XML_RELAXNG_IN_NSEXCEPT) {
+                            xmlRngPErr(ctxt, cur,
+                                       XML_RNGP_PAT_NSNAME_EXCEPT_NSNAME,
+                                       "Found nsName/except//nsName forbidden construct\n",
+                                       NULL, NULL);
+                        }
+                    }
+                } else if ((xmlStrEqual(cur->name, BAD_CAST "except")) &&
+                           (cur != root)) {
+                    int oldflags = ctxt->flags;
+
+                    /*
+                     * 4.16
+                     */
+                    if ((cur->parent != NULL) &&
+                        (xmlStrEqual
+                         (cur->parent->name, BAD_CAST "anyName"))) {
+                        ctxt->flags |= XML_RELAXNG_IN_ANYEXCEPT;
+                        xmlRelaxNGCleanupTree(ctxt, cur);
+                        ctxt->flags = oldflags;
+                        goto skip_children;
+                    } else if ((cur->parent != NULL) &&
+                               (xmlStrEqual
+                                (cur->parent->name, BAD_CAST "nsName"))) {
+                        ctxt->flags |= XML_RELAXNG_IN_NSEXCEPT;
+                        xmlRelaxNGCleanupTree(ctxt, cur);
+                        ctxt->flags = oldflags;
+                        goto skip_children;
+                    }
+                } else if (xmlStrEqual(cur->name, BAD_CAST "anyName")) {
+                    /*
+                     * 4.16
+                     */
+                    if (ctxt->flags & XML_RELAXNG_IN_ANYEXCEPT) {
+                        xmlRngPErr(ctxt, cur,
+                                   XML_RNGP_PAT_ANYNAME_EXCEPT_ANYNAME,
+                                   "Found anyName/except//anyName forbidden construct\n",
+                                   NULL, NULL);
+                    } else if (ctxt->flags & XML_RELAXNG_IN_NSEXCEPT) {
+                        xmlRngPErr(ctxt, cur,
+                                   XML_RNGP_PAT_NSNAME_EXCEPT_ANYNAME,
+                                   "Found nsName/except//anyName forbidden construct\n",
+                                   NULL, NULL);
+                    }
+                }
+                /*
+                 * This is not an else since "include" is transformed
+                 * into a div
+                 */
+                if (xmlStrEqual(cur->name, BAD_CAST "div")) {
+                    xmlChar *ns;
+                    xmlNodePtr child, ins, tmp;
+
+                    /*
+                     * implements rule 4.11
+                     */
+
+                    ns = xmlGetProp(cur, BAD_CAST "ns");
+
+                    child = cur->children;
+                    ins = cur;
+                    while (child != NULL) {
+                        if (ns != NULL) {
+                            if (!xmlHasProp(child, BAD_CAST "ns")) {
+                                xmlSetProp(child, BAD_CAST "ns", ns);
+                            }
+                        }
+                        tmp = child->next;
+                        xmlUnlinkNode(child);
+                        ins = xmlAddNextSibling(ins, child);
+                        child = tmp;
+                    }
+                    if (ns != NULL)
+                        xmlFree(ns);
+		    /*
+		     * Since we are about to delete cur, if its nsDef is non-NULL we
+		     * need to preserve it (it contains the ns definitions for the
+		     * children we just moved).  We'll just stick it on to the end
+		     * of cur->parent's list, since it's never going to be re-serialized
+		     * (bug 143738).
+		     */
+		    if ((cur->nsDef != NULL) && (cur->parent != NULL)) {
+			xmlNsPtr parDef = (xmlNsPtr)&cur->parent->nsDef;
+			while (parDef->next != NULL)
+			    parDef = parDef->next;
+			parDef->next = cur->nsDef;
+			cur->nsDef = NULL;
+		    }
+                    delete = cur;
+                    goto skip_children;
+                }
+            }
+        }
+        /*
+         * Simplification 4.2 whitespaces
+         */
+        else if ((cur->type == XML_TEXT_NODE) ||
+                 (cur->type == XML_CDATA_SECTION_NODE)) {
+            if (IS_BLANK_NODE(cur)) {
+                if ((cur->parent != NULL) &&
+		    (cur->parent->type == XML_ELEMENT_NODE)) {
+                    if ((!xmlStrEqual(cur->parent->name, BAD_CAST "value"))
+                        &&
+                        (!xmlStrEqual
+                         (cur->parent->name, BAD_CAST "param")))
+                        delete = cur;
+                } else {
+                    delete = cur;
+                    goto skip_children;
+                }
+            }
+        } else {
+            delete = cur;
+            goto skip_children;
+        }
+
+        /*
+         * Skip to next node
+         */
+        if (cur->children != NULL) {
+            if ((cur->children->type != XML_ENTITY_DECL) &&
+                (cur->children->type != XML_ENTITY_REF_NODE) &&
+                (cur->children->type != XML_ENTITY_NODE)) {
+                cur = cur->children;
+                continue;
+            }
+        }
+      skip_children:
+        if (cur->next != NULL) {
+            cur = cur->next;
+            continue;
+        }
+
+        do {
+            cur = cur->parent;
+            if (cur == NULL)
+                break;
+            if (cur == root) {
+                cur = NULL;
+                break;
+            }
+            if (cur->next != NULL) {
+                cur = cur->next;
+                break;
+            }
+        } while (cur != NULL);
+    }
+    if (delete != NULL) {
+        xmlUnlinkNode(delete);
+        xmlFreeNode(delete);
+        delete = NULL;
+    }
+}
+
+/**
+ * xmlRelaxNGCleanupDoc:
+ * @ctxt:  a Relax-NG parser context
+ * @doc:  an xmldocPtr document pointer
+ *
+ * Cleanup the document from unwanted nodes for parsing, resolve
+ * Include and externalRef lookups.
+ *
+ * Returns the cleaned up document or NULL in case of error
+ */
+static xmlDocPtr
+xmlRelaxNGCleanupDoc(xmlRelaxNGParserCtxtPtr ctxt, xmlDocPtr doc)
+{
+    xmlNodePtr root;
+
+    /*
+     * Extract the root
+     */
+    root = xmlDocGetRootElement(doc);
+    if (root == NULL) {
+        xmlRngPErr(ctxt, (xmlNodePtr) doc, XML_RNGP_EMPTY, "xmlRelaxNGParse: %s is empty\n",
+                   ctxt->URL, NULL);
+        return (NULL);
+    }
+    xmlRelaxNGCleanupTree(ctxt, root);
+    return (doc);
+}
+
+/**
+ * xmlRelaxNGParse:
+ * @ctxt:  a Relax-NG parser context
+ *
+ * parse a schema definition resource and build an internal
+ * XML Shema struture which can be used to validate instances.
+ *
+ * Returns the internal XML RelaxNG structure built from the resource or
+ *         NULL in case of error
+ */
+xmlRelaxNGPtr
+xmlRelaxNGParse(xmlRelaxNGParserCtxtPtr ctxt)
+{
+    xmlRelaxNGPtr ret = NULL;
+    xmlDocPtr doc;
+    xmlNodePtr root;
+
+    xmlRelaxNGInitTypes();
+
+    if (ctxt == NULL)
+        return (NULL);
+
+    /*
+     * First step is to parse the input document into an DOM/Infoset
+     */
+    if (ctxt->URL != NULL) {
+        doc = xmlReadFile((const char *) ctxt->URL,NULL,0);
+        if (doc == NULL) {
+            xmlRngPErr(ctxt, NULL, XML_RNGP_PARSE_ERROR,
+                       "xmlRelaxNGParse: could not load %s\n", ctxt->URL,
+                       NULL);
+            return (NULL);
+        }
+    } else if (ctxt->buffer != NULL) {
+        doc = xmlReadMemory(ctxt->buffer, ctxt->size,NULL,NULL,0);
+        if (doc == NULL) {
+            xmlRngPErr(ctxt, NULL, XML_RNGP_PARSE_ERROR,
+                       "xmlRelaxNGParse: could not parse schemas\n", NULL,
+                       NULL);
+            return (NULL);
+        }
+        doc->URL = xmlStrdup(BAD_CAST "in_memory_buffer");
+        ctxt->URL = xmlStrdup(BAD_CAST "in_memory_buffer");
+    } else if (ctxt->document != NULL) {
+        doc = ctxt->document;
+    } else {
+        xmlRngPErr(ctxt, NULL, XML_RNGP_EMPTY,
+                   "xmlRelaxNGParse: nothing to parse\n", NULL, NULL);
+        return (NULL);
+    }
+    ctxt->document = doc;
+
+    /*
+     * Some preprocessing of the document content
+     */
+    doc = xmlRelaxNGCleanupDoc(ctxt, doc);
+    if (doc == NULL) {
+        xmlFreeDoc(ctxt->document);
+        ctxt->document = NULL;
+        return (NULL);
+    }
+
+    /*
+     * Then do the parsing for good
+     */
+    root = xmlDocGetRootElement(doc);
+    if (root == NULL) {
+        xmlRngPErr(ctxt, (xmlNodePtr) doc,
+	           XML_RNGP_EMPTY, "xmlRelaxNGParse: %s is empty\n",
+                   (ctxt->URL ? ctxt->URL : BAD_CAST "schemas"), NULL);
+
+        xmlFreeDoc(ctxt->document);
+        ctxt->document = NULL;
+        return (NULL);
+    }
+    ret = xmlRelaxNGParseDocument(ctxt, root);
+    if (ret == NULL) {
+        xmlFreeDoc(ctxt->document);
+        ctxt->document = NULL;
+        return (NULL);
+    }
+
+    /*
+     * Check the ref/defines links
+     */
+    /*
+     * try to preprocess interleaves
+     */
+    if (ctxt->interleaves != NULL) {
+        xmlHashScan(ctxt->interleaves,
+                    (xmlHashScanner) xmlRelaxNGComputeInterleaves, ctxt);
+    }
+
+    /*
+     * if there was a parsing error return NULL
+     */
+    if (ctxt->nbErrors > 0) {
+        xmlRelaxNGFree(ret);
+        ctxt->document = NULL;
+        xmlFreeDoc(doc);
+        return (NULL);
+    }
+
+    /*
+     * try to compile (parts of) the schemas
+     */
+    if ((ret->topgrammar != NULL) && (ret->topgrammar->start != NULL)) {
+        if (ret->topgrammar->start->type != XML_RELAXNG_START) {
+            xmlRelaxNGDefinePtr def;
+
+            def = xmlRelaxNGNewDefine(ctxt, NULL);
+            if (def != NULL) {
+                def->type = XML_RELAXNG_START;
+                def->content = ret->topgrammar->start;
+                ret->topgrammar->start = def;
+            }
+        }
+        xmlRelaxNGTryCompile(ctxt, ret->topgrammar->start);
+    }
+
+    /*
+     * Transfer the pointer for cleanup at the schema level.
+     */
+    ret->doc = doc;
+    ctxt->document = NULL;
+    ret->documents = ctxt->documents;
+    ctxt->documents = NULL;
+
+    ret->includes = ctxt->includes;
+    ctxt->includes = NULL;
+    ret->defNr = ctxt->defNr;
+    ret->defTab = ctxt->defTab;
+    ctxt->defTab = NULL;
+    if (ctxt->idref == 1)
+        ret->idref = 1;
+
+    return (ret);
+}
+
+/**
+ * xmlRelaxNGSetParserErrors:
+ * @ctxt:  a Relax-NG validation context
+ * @err:  the error callback
+ * @warn:  the warning callback
+ * @ctx:  contextual data for the callbacks
+ *
+ * Set the callback functions used to handle errors for a validation context
+ */
+void
+xmlRelaxNGSetParserErrors(xmlRelaxNGParserCtxtPtr ctxt,
+                          xmlRelaxNGValidityErrorFunc err,
+                          xmlRelaxNGValidityWarningFunc warn, void *ctx)
+{
+    if (ctxt == NULL)
+        return;
+    ctxt->error = err;
+    ctxt->warning = warn;
+    ctxt->serror = NULL;
+    ctxt->userData = ctx;
+}
+
+/**
+ * xmlRelaxNGGetParserErrors:
+ * @ctxt:  a Relax-NG validation context
+ * @err:  the error callback result
+ * @warn:  the warning callback result
+ * @ctx:  contextual data for the callbacks result
+ *
+ * Get the callback information used to handle errors for a validation context
+ *
+ * Returns -1 in case of failure, 0 otherwise.
+ */
+int
+xmlRelaxNGGetParserErrors(xmlRelaxNGParserCtxtPtr ctxt,
+                          xmlRelaxNGValidityErrorFunc * err,
+                          xmlRelaxNGValidityWarningFunc * warn, void **ctx)
+{
+    if (ctxt == NULL)
+        return (-1);
+    if (err != NULL)
+        *err = ctxt->error;
+    if (warn != NULL)
+        *warn = ctxt->warning;
+    if (ctx != NULL)
+        *ctx = ctxt->userData;
+    return (0);
+}
+
+/**
+ * xmlRelaxNGSetParserStructuredErrors:
+ * @ctxt:  a Relax-NG parser context
+ * @serror:  the error callback
+ * @ctx:  contextual data for the callbacks
+ *
+ * Set the callback functions used to handle errors for a parsing context
+ */
+void
+xmlRelaxNGSetParserStructuredErrors(xmlRelaxNGParserCtxtPtr ctxt,
+				    xmlStructuredErrorFunc serror,
+				    void *ctx)
+{
+    if (ctxt == NULL)
+        return;
+    ctxt->serror = serror;
+    ctxt->error = NULL;
+    ctxt->warning = NULL;
+    ctxt->userData = ctx;
+}
+
+#ifdef LIBXML_OUTPUT_ENABLED
+
+/************************************************************************
+ *									*
+ *			Dump back a compiled form			*
+ *									*
+ ************************************************************************/
+static void xmlRelaxNGDumpDefine(FILE * output,
+                                 xmlRelaxNGDefinePtr define);
+
+/**
+ * xmlRelaxNGDumpDefines:
+ * @output:  the file output
+ * @defines:  a list of define structures
+ *
+ * Dump a RelaxNG structure back
+ */
+static void
+xmlRelaxNGDumpDefines(FILE * output, xmlRelaxNGDefinePtr defines)
+{
+    while (defines != NULL) {
+        xmlRelaxNGDumpDefine(output, defines);
+        defines = defines->next;
+    }
+}
+
+/**
+ * xmlRelaxNGDumpDefine:
+ * @output:  the file output
+ * @define:  a define structure
+ *
+ * Dump a RelaxNG structure back
+ */
+static void
+xmlRelaxNGDumpDefine(FILE * output, xmlRelaxNGDefinePtr define)
+{
+    if (define == NULL)
+        return;
+    switch (define->type) {
+        case XML_RELAXNG_EMPTY:
+            fprintf(output, "<empty/>\n");
+            break;
+        case XML_RELAXNG_NOT_ALLOWED:
+            fprintf(output, "<notAllowed/>\n");
+            break;
+        case XML_RELAXNG_TEXT:
+            fprintf(output, "<text/>\n");
+            break;
+        case XML_RELAXNG_ELEMENT:
+            fprintf(output, "<element>\n");
+            if (define->name != NULL) {
+                fprintf(output, "<name");
+                if (define->ns != NULL)
+                    fprintf(output, " ns=\"%s\"", define->ns);
+                fprintf(output, ">%s</name>\n", define->name);
+            }
+            xmlRelaxNGDumpDefines(output, define->attrs);
+            xmlRelaxNGDumpDefines(output, define->content);
+            fprintf(output, "</element>\n");
+            break;
+        case XML_RELAXNG_LIST:
+            fprintf(output, "<list>\n");
+            xmlRelaxNGDumpDefines(output, define->content);
+            fprintf(output, "</list>\n");
+            break;
+        case XML_RELAXNG_ONEORMORE:
+            fprintf(output, "<oneOrMore>\n");
+            xmlRelaxNGDumpDefines(output, define->content);
+            fprintf(output, "</oneOrMore>\n");
+            break;
+        case XML_RELAXNG_ZEROORMORE:
+            fprintf(output, "<zeroOrMore>\n");
+            xmlRelaxNGDumpDefines(output, define->content);
+            fprintf(output, "</zeroOrMore>\n");
+            break;
+        case XML_RELAXNG_CHOICE:
+            fprintf(output, "<choice>\n");
+            xmlRelaxNGDumpDefines(output, define->content);
+            fprintf(output, "</choice>\n");
+            break;
+        case XML_RELAXNG_GROUP:
+            fprintf(output, "<group>\n");
+            xmlRelaxNGDumpDefines(output, define->content);
+            fprintf(output, "</group>\n");
+            break;
+        case XML_RELAXNG_INTERLEAVE:
+            fprintf(output, "<interleave>\n");
+            xmlRelaxNGDumpDefines(output, define->content);
+            fprintf(output, "</interleave>\n");
+            break;
+        case XML_RELAXNG_OPTIONAL:
+            fprintf(output, "<optional>\n");
+            xmlRelaxNGDumpDefines(output, define->content);
+            fprintf(output, "</optional>\n");
+            break;
+        case XML_RELAXNG_ATTRIBUTE:
+            fprintf(output, "<attribute>\n");
+            xmlRelaxNGDumpDefines(output, define->content);
+            fprintf(output, "</attribute>\n");
+            break;
+        case XML_RELAXNG_DEF:
+            fprintf(output, "<define");
+            if (define->name != NULL)
+                fprintf(output, " name=\"%s\"", define->name);
+            fprintf(output, ">\n");
+            xmlRelaxNGDumpDefines(output, define->content);
+            fprintf(output, "</define>\n");
+            break;
+        case XML_RELAXNG_REF:
+            fprintf(output, "<ref");
+            if (define->name != NULL)
+                fprintf(output, " name=\"%s\"", define->name);
+            fprintf(output, ">\n");
+            xmlRelaxNGDumpDefines(output, define->content);
+            fprintf(output, "</ref>\n");
+            break;
+        case XML_RELAXNG_PARENTREF:
+            fprintf(output, "<parentRef");
+            if (define->name != NULL)
+                fprintf(output, " name=\"%s\"", define->name);
+            fprintf(output, ">\n");
+            xmlRelaxNGDumpDefines(output, define->content);
+            fprintf(output, "</parentRef>\n");
+            break;
+        case XML_RELAXNG_EXTERNALREF:
+            fprintf(output, "<externalRef>");
+            xmlRelaxNGDumpDefines(output, define->content);
+            fprintf(output, "</externalRef>\n");
+            break;
+        case XML_RELAXNG_DATATYPE:
+        case XML_RELAXNG_VALUE:
+            TODO break;
+        case XML_RELAXNG_START:
+        case XML_RELAXNG_EXCEPT:
+        case XML_RELAXNG_PARAM:
+            TODO break;
+        case XML_RELAXNG_NOOP:
+            xmlRelaxNGDumpDefines(output, define->content);
+            break;
+    }
+}
+
+/**
+ * xmlRelaxNGDumpGrammar:
+ * @output:  the file output
+ * @grammar:  a grammar structure
+ * @top:  is this a top grammar
+ *
+ * Dump a RelaxNG structure back
+ */
+static void
+xmlRelaxNGDumpGrammar(FILE * output, xmlRelaxNGGrammarPtr grammar, int top)
+{
+    if (grammar == NULL)
+        return;
+
+    fprintf(output, "<grammar");
+    if (top)
+        fprintf(output, " xmlns=\"http://relaxng.org/ns/structure/1.0\"");
+    switch (grammar->combine) {
+        case XML_RELAXNG_COMBINE_UNDEFINED:
+            break;
+        case XML_RELAXNG_COMBINE_CHOICE:
+            fprintf(output, " combine=\"choice\"");
+            break;
+        case XML_RELAXNG_COMBINE_INTERLEAVE:
+            fprintf(output, " combine=\"interleave\"");
+            break;
+        default:
+            fprintf(output, " <!-- invalid combine value -->");
+    }
+    fprintf(output, ">\n");
+    if (grammar->start == NULL) {
+        fprintf(output, " <!-- grammar had no start -->");
+    } else {
+        fprintf(output, "<start>\n");
+        xmlRelaxNGDumpDefine(output, grammar->start);
+        fprintf(output, "</start>\n");
+    }
+    /* TODO ? Dump the defines ? */
+    fprintf(output, "</grammar>\n");
+}
+
+/**
+ * xmlRelaxNGDump:
+ * @output:  the file output
+ * @schema:  a schema structure
+ *
+ * Dump a RelaxNG structure back
+ */
+void
+xmlRelaxNGDump(FILE * output, xmlRelaxNGPtr schema)
+{
+    if (output == NULL)
+        return;
+    if (schema == NULL) {
+        fprintf(output, "RelaxNG empty or failed to compile\n");
+        return;
+    }
+    fprintf(output, "RelaxNG: ");
+    if (schema->doc == NULL) {
+        fprintf(output, "no document\n");
+    } else if (schema->doc->URL != NULL) {
+        fprintf(output, "%s\n", schema->doc->URL);
+    } else {
+        fprintf(output, "\n");
+    }
+    if (schema->topgrammar == NULL) {
+        fprintf(output, "RelaxNG has no top grammar\n");
+        return;
+    }
+    xmlRelaxNGDumpGrammar(output, schema->topgrammar, 1);
+}
+
+/**
+ * xmlRelaxNGDumpTree:
+ * @output:  the file output
+ * @schema:  a schema structure
+ *
+ * Dump the transformed RelaxNG tree.
+ */
+void
+xmlRelaxNGDumpTree(FILE * output, xmlRelaxNGPtr schema)
+{
+    if (output == NULL)
+        return;
+    if (schema == NULL) {
+        fprintf(output, "RelaxNG empty or failed to compile\n");
+        return;
+    }
+    if (schema->doc == NULL) {
+        fprintf(output, "no document\n");
+    } else {
+        xmlDocDump(output, schema->doc);
+    }
+}
+#endif /* LIBXML_OUTPUT_ENABLED */
+
+/************************************************************************
+ *									*
+ *		Validation of compiled content				*
+ *									*
+ ************************************************************************/
+static int xmlRelaxNGValidateDefinition(xmlRelaxNGValidCtxtPtr ctxt,
+                                        xmlRelaxNGDefinePtr define);
+
+/**
+ * xmlRelaxNGValidateCompiledCallback:
+ * @exec:  the regular expression instance
+ * @token:  the token which matched
+ * @transdata:  callback data, the define for the subelement if available
+ @ @inputdata:  callback data, the Relax NG validation context
+ *
+ * Handle the callback and if needed validate the element children.
+ */
+static void
+xmlRelaxNGValidateCompiledCallback(xmlRegExecCtxtPtr exec ATTRIBUTE_UNUSED,
+                                   const xmlChar * token,
+                                   void *transdata, void *inputdata)
+{
+    xmlRelaxNGValidCtxtPtr ctxt = (xmlRelaxNGValidCtxtPtr) inputdata;
+    xmlRelaxNGDefinePtr define = (xmlRelaxNGDefinePtr) transdata;
+    int ret;
+
+#ifdef DEBUG_COMPILE
+    xmlGenericError(xmlGenericErrorContext,
+                    "Compiled callback for: '%s'\n", token);
+#endif
+    if (ctxt == NULL) {
+        fprintf(stderr, "callback on %s missing context\n", token);
+        return;
+    }
+    if (define == NULL) {
+        if (token[0] == '#')
+            return;
+        fprintf(stderr, "callback on %s missing define\n", token);
+        if ((ctxt != NULL) && (ctxt->errNo == XML_RELAXNG_OK))
+            ctxt->errNo = XML_RELAXNG_ERR_INTERNAL;
+        return;
+    }
+    if ((ctxt == NULL) || (define == NULL)) {
+        fprintf(stderr, "callback on %s missing info\n", token);
+        if ((ctxt != NULL) && (ctxt->errNo == XML_RELAXNG_OK))
+            ctxt->errNo = XML_RELAXNG_ERR_INTERNAL;
+        return;
+    } else if (define->type != XML_RELAXNG_ELEMENT) {
+        fprintf(stderr, "callback on %s define is not element\n", token);
+        if (ctxt->errNo == XML_RELAXNG_OK)
+            ctxt->errNo = XML_RELAXNG_ERR_INTERNAL;
+        return;
+    }
+    ret = xmlRelaxNGValidateDefinition(ctxt, define);
+    if (ret != 0)
+        ctxt->perr = ret;
+}
+
+/**
+ * xmlRelaxNGValidateCompiledContent:
+ * @ctxt:  the RelaxNG validation context
+ * @regexp:  the regular expression as compiled
+ * @content:  list of children to test against the regexp
+ *
+ * Validate the content model of an element or start using the regexp
+ *
+ * Returns 0 in case of success, -1 in case of error.
+ */
+static int
+xmlRelaxNGValidateCompiledContent(xmlRelaxNGValidCtxtPtr ctxt,
+                                  xmlRegexpPtr regexp, xmlNodePtr content)
+{
+    xmlRegExecCtxtPtr exec;
+    xmlNodePtr cur;
+    int ret = 0;
+    int oldperr;
+
+    if ((ctxt == NULL) || (regexp == NULL))
+        return (-1);
+    oldperr = ctxt->perr;
+    exec = xmlRegNewExecCtxt(regexp,
+                             xmlRelaxNGValidateCompiledCallback, ctxt);
+    ctxt->perr = 0;
+    cur = content;
+    while (cur != NULL) {
+        ctxt->state->seq = cur;
+        switch (cur->type) {
+            case XML_TEXT_NODE:
+            case XML_CDATA_SECTION_NODE:
+                if (xmlIsBlankNode(cur))
+                    break;
+                ret = xmlRegExecPushString(exec, BAD_CAST "#text", ctxt);
+                if (ret < 0) {
+                    VALID_ERR2(XML_RELAXNG_ERR_TEXTWRONG,
+                               cur->parent->name);
+                }
+                break;
+            case XML_ELEMENT_NODE:
+                if (cur->ns != NULL) {
+                    ret = xmlRegExecPushString2(exec, cur->name,
+                                                cur->ns->href, ctxt);
+                } else {
+                    ret = xmlRegExecPushString(exec, cur->name, ctxt);
+                }
+                if (ret < 0) {
+                    VALID_ERR2(XML_RELAXNG_ERR_ELEMWRONG, cur->name);
+                }
+                break;
+            default:
+                break;
+        }
+        if (ret < 0)
+            break;
+        /*
+         * Switch to next element
+         */
+        cur = cur->next;
+    }
+    ret = xmlRegExecPushString(exec, NULL, NULL);
+    if (ret == 1) {
+        ret = 0;
+        ctxt->state->seq = NULL;
+    } else if (ret == 0) {
+        /*
+         * TODO: get some of the names needed to exit the current state of exec
+         */
+        VALID_ERR2(XML_RELAXNG_ERR_NOELEM, BAD_CAST "");
+        ret = -1;
+        if ((ctxt->flags & FLAGS_IGNORABLE) == 0)
+            xmlRelaxNGDumpValidError(ctxt);
+    } else {
+        ret = -1;
+    }
+    xmlRegFreeExecCtxt(exec);
+    /*
+     * There might be content model errors outside of the pure
+     * regexp validation, e.g. for attribute values.
+     */
+    if ((ret == 0) && (ctxt->perr != 0)) {
+        ret = ctxt->perr;
+    }
+    ctxt->perr = oldperr;
+    return (ret);
+}
+
+/************************************************************************
+ *									*
+ *		Progressive validation of when possible			*
+ *									*
+ ************************************************************************/
+static int xmlRelaxNGValidateAttributeList(xmlRelaxNGValidCtxtPtr ctxt,
+                                           xmlRelaxNGDefinePtr defines);
+static int xmlRelaxNGValidateElementEnd(xmlRelaxNGValidCtxtPtr ctxt,
+                                        int dolog);
+static void xmlRelaxNGLogBestError(xmlRelaxNGValidCtxtPtr ctxt);
+
+/**
+ * xmlRelaxNGElemPush:
+ * @ctxt:  the validation context
+ * @exec:  the regexp runtime for the new content model
+ *
+ * Push a new regexp for the current node content model on the stack
+ *
+ * Returns 0 in case of success and -1 in case of error.
+ */
+static int
+xmlRelaxNGElemPush(xmlRelaxNGValidCtxtPtr ctxt, xmlRegExecCtxtPtr exec)
+{
+    if (ctxt->elemTab == NULL) {
+        ctxt->elemMax = 10;
+        ctxt->elemTab = (xmlRegExecCtxtPtr *) xmlMalloc(ctxt->elemMax *
+                                                        sizeof
+                                                        (xmlRegExecCtxtPtr));
+        if (ctxt->elemTab == NULL) {
+            xmlRngVErrMemory(ctxt, "validating\n");
+            return (-1);
+        }
+    }
+    if (ctxt->elemNr >= ctxt->elemMax) {
+        ctxt->elemMax *= 2;
+        ctxt->elemTab = (xmlRegExecCtxtPtr *) xmlRealloc(ctxt->elemTab,
+                                                         ctxt->elemMax *
+                                                         sizeof
+                                                         (xmlRegExecCtxtPtr));
+        if (ctxt->elemTab == NULL) {
+            xmlRngVErrMemory(ctxt, "validating\n");
+            return (-1);
+        }
+    }
+    ctxt->elemTab[ctxt->elemNr++] = exec;
+    ctxt->elem = exec;
+    return (0);
+}
+
+/**
+ * xmlRelaxNGElemPop:
+ * @ctxt:  the validation context
+ *
+ * Pop the regexp of the current node content model from the stack
+ *
+ * Returns the exec or NULL if empty
+ */
+static xmlRegExecCtxtPtr
+xmlRelaxNGElemPop(xmlRelaxNGValidCtxtPtr ctxt)
+{
+    xmlRegExecCtxtPtr ret;
+
+    if (ctxt->elemNr <= 0)
+        return (NULL);
+    ctxt->elemNr--;
+    ret = ctxt->elemTab[ctxt->elemNr];
+    ctxt->elemTab[ctxt->elemNr] = NULL;
+    if (ctxt->elemNr > 0)
+        ctxt->elem = ctxt->elemTab[ctxt->elemNr - 1];
+    else
+        ctxt->elem = NULL;
+    return (ret);
+}
+
+/**
+ * xmlRelaxNGValidateProgressiveCallback:
+ * @exec:  the regular expression instance
+ * @token:  the token which matched
+ * @transdata:  callback data, the define for the subelement if available
+ @ @inputdata:  callback data, the Relax NG validation context
+ *
+ * Handle the callback and if needed validate the element children.
+ * some of the in/out informations are passed via the context in @inputdata.
+ */
+static void
+xmlRelaxNGValidateProgressiveCallback(xmlRegExecCtxtPtr exec
+                                      ATTRIBUTE_UNUSED,
+                                      const xmlChar * token,
+                                      void *transdata, void *inputdata)
+{
+    xmlRelaxNGValidCtxtPtr ctxt = (xmlRelaxNGValidCtxtPtr) inputdata;
+    xmlRelaxNGDefinePtr define = (xmlRelaxNGDefinePtr) transdata;
+    xmlRelaxNGValidStatePtr state, oldstate;
+    xmlNodePtr node;
+    int ret = 0, oldflags;
+
+#ifdef DEBUG_PROGRESSIVE
+    xmlGenericError(xmlGenericErrorContext,
+                    "Progressive callback for: '%s'\n", token);
+#endif
+    if (ctxt == NULL) {
+        fprintf(stderr, "callback on %s missing context\n", token);
+        return;
+    }
+    node = ctxt->pnode;
+    ctxt->pstate = 1;
+    if (define == NULL) {
+        if (token[0] == '#')
+            return;
+        fprintf(stderr, "callback on %s missing define\n", token);
+        if ((ctxt != NULL) && (ctxt->errNo == XML_RELAXNG_OK))
+            ctxt->errNo = XML_RELAXNG_ERR_INTERNAL;
+        ctxt->pstate = -1;
+        return;
+    }
+    if ((ctxt == NULL) || (define == NULL)) {
+        fprintf(stderr, "callback on %s missing info\n", token);
+        if ((ctxt != NULL) && (ctxt->errNo == XML_RELAXNG_OK))
+            ctxt->errNo = XML_RELAXNG_ERR_INTERNAL;
+        ctxt->pstate = -1;
+        return;
+    } else if (define->type != XML_RELAXNG_ELEMENT) {
+        fprintf(stderr, "callback on %s define is not element\n", token);
+        if (ctxt->errNo == XML_RELAXNG_OK)
+            ctxt->errNo = XML_RELAXNG_ERR_INTERNAL;
+        ctxt->pstate = -1;
+        return;
+    }
+    if (node->type != XML_ELEMENT_NODE) {
+        VALID_ERR(XML_RELAXNG_ERR_NOTELEM);
+        if ((ctxt->flags & FLAGS_IGNORABLE) == 0)
+            xmlRelaxNGDumpValidError(ctxt);
+        ctxt->pstate = -1;
+        return;
+    }
+    if (define->contModel == NULL) {
+        /*
+         * this node cannot be validated in a streamable fashion
+         */
+#ifdef DEBUG_PROGRESSIVE
+        xmlGenericError(xmlGenericErrorContext,
+                        "Element '%s' validation is not streamable\n",
+                        token);
+#endif
+        ctxt->pstate = 0;
+        ctxt->pdef = define;
+        return;
+    }
+    exec = xmlRegNewExecCtxt(define->contModel,
+                             xmlRelaxNGValidateProgressiveCallback, ctxt);
+    if (exec == NULL) {
+        ctxt->pstate = -1;
+        return;
+    }
+    xmlRelaxNGElemPush(ctxt, exec);
+
+    /*
+     * Validate the attributes part of the content.
+     */
+    state = xmlRelaxNGNewValidState(ctxt, node);
+    if (state == NULL) {
+        ctxt->pstate = -1;
+        return;
+    }
+    oldstate = ctxt->state;
+    ctxt->state = state;
+    if (define->attrs != NULL) {
+        ret = xmlRelaxNGValidateAttributeList(ctxt, define->attrs);
+        if (ret != 0) {
+            ctxt->pstate = -1;
+            VALID_ERR2(XML_RELAXNG_ERR_ATTRVALID, node->name);
+        }
+    }
+    if (ctxt->state != NULL) {
+        ctxt->state->seq = NULL;
+        ret = xmlRelaxNGValidateElementEnd(ctxt, 1);
+        if (ret != 0) {
+            ctxt->pstate = -1;
+        }
+        xmlRelaxNGFreeValidState(ctxt, ctxt->state);
+    } else if (ctxt->states != NULL) {
+        int tmp = -1, i;
+
+        oldflags = ctxt->flags;
+
+        for (i = 0; i < ctxt->states->nbState; i++) {
+            state = ctxt->states->tabState[i];
+            ctxt->state = state;
+            ctxt->state->seq = NULL;
+
+            if (xmlRelaxNGValidateElementEnd(ctxt, 0) == 0) {
+                tmp = 0;
+                break;
+            }
+        }
+        if (tmp != 0) {
+            /*
+             * validation error, log the message for the "best" one
+             */
+            ctxt->flags |= FLAGS_IGNORABLE;
+            xmlRelaxNGLogBestError(ctxt);
+        }
+        for (i = 0; i < ctxt->states->nbState; i++) {
+            xmlRelaxNGFreeValidState(ctxt, ctxt->states->tabState[i]);
+        }
+        xmlRelaxNGFreeStates(ctxt, ctxt->states);
+        ctxt->states = NULL;
+        if ((ret == 0) && (tmp == -1))
+            ctxt->pstate = -1;
+        ctxt->flags = oldflags;
+    }
+    if (ctxt->pstate == -1) {
+        if ((ctxt->flags & FLAGS_IGNORABLE) == 0) {
+            xmlRelaxNGDumpValidError(ctxt);
+        }
+    }
+    ctxt->state = oldstate;
+}
+
+/**
+ * xmlRelaxNGValidatePushElement:
+ * @ctxt:  the validation context
+ * @doc:  a document instance
+ * @elem:  an element instance
+ *
+ * Push a new element start on the RelaxNG validation stack.
+ *
+ * returns 1 if no validation problem was found or 0 if validating the
+ *         element requires a full node, and -1 in case of error.
+ */
+int
+xmlRelaxNGValidatePushElement(xmlRelaxNGValidCtxtPtr ctxt,
+                              xmlDocPtr doc ATTRIBUTE_UNUSED,
+                              xmlNodePtr elem)
+{
+    int ret = 1;
+
+    if ((ctxt == NULL) || (elem == NULL))
+        return (-1);
+
+#ifdef DEBUG_PROGRESSIVE
+    xmlGenericError(xmlGenericErrorContext, "PushElem %s\n", elem->name);
+#endif
+    if (ctxt->elem == 0) {
+        xmlRelaxNGPtr schema;
+        xmlRelaxNGGrammarPtr grammar;
+        xmlRegExecCtxtPtr exec;
+        xmlRelaxNGDefinePtr define;
+
+        schema = ctxt->schema;
+        if (schema == NULL) {
+            VALID_ERR(XML_RELAXNG_ERR_NOGRAMMAR);
+            return (-1);
+        }
+        grammar = schema->topgrammar;
+        if ((grammar == NULL) || (grammar->start == NULL)) {
+            VALID_ERR(XML_RELAXNG_ERR_NOGRAMMAR);
+            return (-1);
+        }
+        define = grammar->start;
+        if (define->contModel == NULL) {
+            ctxt->pdef = define;
+            return (0);
+        }
+        exec = xmlRegNewExecCtxt(define->contModel,
+                                 xmlRelaxNGValidateProgressiveCallback,
+                                 ctxt);
+        if (exec == NULL) {
+            return (-1);
+        }
+        xmlRelaxNGElemPush(ctxt, exec);
+    }
+    ctxt->pnode = elem;
+    ctxt->pstate = 0;
+    if (elem->ns != NULL) {
+        ret =
+            xmlRegExecPushString2(ctxt->elem, elem->name, elem->ns->href,
+                                  ctxt);
+    } else {
+        ret = xmlRegExecPushString(ctxt->elem, elem->name, ctxt);
+    }
+    if (ret < 0) {
+        VALID_ERR2(XML_RELAXNG_ERR_ELEMWRONG, elem->name);
+    } else {
+        if (ctxt->pstate == 0)
+            ret = 0;
+        else if (ctxt->pstate < 0)
+            ret = -1;
+        else
+            ret = 1;
+    }
+#ifdef DEBUG_PROGRESSIVE
+    if (ret < 0)
+        xmlGenericError(xmlGenericErrorContext, "PushElem %s failed\n",
+                        elem->name);
+#endif
+    return (ret);
+}
+
+/**
+ * xmlRelaxNGValidatePushCData:
+ * @ctxt:  the RelaxNG validation context
+ * @data:  some character data read
+ * @len:  the length of the data
+ *
+ * check the CData parsed for validation in the current stack
+ *
+ * returns 1 if no validation problem was found or -1 otherwise
+ */
+int
+xmlRelaxNGValidatePushCData(xmlRelaxNGValidCtxtPtr ctxt,
+                            const xmlChar * data, int len ATTRIBUTE_UNUSED)
+{
+    int ret = 1;
+
+    if ((ctxt == NULL) || (ctxt->elem == NULL) || (data == NULL))
+        return (-1);
+
+#ifdef DEBUG_PROGRESSIVE
+    xmlGenericError(xmlGenericErrorContext, "CDATA %s %d\n", data, len);
+#endif
+
+    while (*data != 0) {
+        if (!IS_BLANK_CH(*data))
+            break;
+        data++;
+    }
+    if (*data == 0)
+        return (1);
+
+    ret = xmlRegExecPushString(ctxt->elem, BAD_CAST "#text", ctxt);
+    if (ret < 0) {
+        VALID_ERR2(XML_RELAXNG_ERR_TEXTWRONG, BAD_CAST " TODO ");
+#ifdef DEBUG_PROGRESSIVE
+        xmlGenericError(xmlGenericErrorContext, "CDATA failed\n");
+#endif
+
+        return (-1);
+    }
+    return (1);
+}
+
+/**
+ * xmlRelaxNGValidatePopElement:
+ * @ctxt:  the RelaxNG validation context
+ * @doc:  a document instance
+ * @elem:  an element instance
+ *
+ * Pop the element end from the RelaxNG validation stack.
+ *
+ * returns 1 if no validation problem was found or 0 otherwise
+ */
+int
+xmlRelaxNGValidatePopElement(xmlRelaxNGValidCtxtPtr ctxt,
+                             xmlDocPtr doc ATTRIBUTE_UNUSED,
+                             xmlNodePtr elem)
+{
+    int ret;
+    xmlRegExecCtxtPtr exec;
+
+    if ((ctxt == NULL) || (ctxt->elem == NULL) || (elem == NULL))
+        return (-1);
+#ifdef DEBUG_PROGRESSIVE
+    xmlGenericError(xmlGenericErrorContext, "PopElem %s\n", elem->name);
+#endif
+    /*
+     * verify that we reached a terminal state of the content model.
+     */
+    exec = xmlRelaxNGElemPop(ctxt);
+    ret = xmlRegExecPushString(exec, NULL, NULL);
+    if (ret == 0) {
+        /*
+         * TODO: get some of the names needed to exit the current state of exec
+         */
+        VALID_ERR2(XML_RELAXNG_ERR_NOELEM, BAD_CAST "");
+        ret = -1;
+    } else if (ret < 0) {
+        ret = -1;
+    } else {
+        ret = 1;
+    }
+    xmlRegFreeExecCtxt(exec);
+#ifdef DEBUG_PROGRESSIVE
+    if (ret < 0)
+        xmlGenericError(xmlGenericErrorContext, "PopElem %s failed\n",
+                        elem->name);
+#endif
+    return (ret);
+}
+
+/**
+ * xmlRelaxNGValidateFullElement:
+ * @ctxt:  the validation context
+ * @doc:  a document instance
+ * @elem:  an element instance
+ *
+ * Validate a full subtree when xmlRelaxNGValidatePushElement() returned
+ * 0 and the content of the node has been expanded.
+ *
+ * returns 1 if no validation problem was found or -1 in case of error.
+ */
+int
+xmlRelaxNGValidateFullElement(xmlRelaxNGValidCtxtPtr ctxt,
+                              xmlDocPtr doc ATTRIBUTE_UNUSED,
+                              xmlNodePtr elem)
+{
+    int ret;
+    xmlRelaxNGValidStatePtr state;
+
+    if ((ctxt == NULL) || (ctxt->pdef == NULL) || (elem == NULL))
+        return (-1);
+#ifdef DEBUG_PROGRESSIVE
+    xmlGenericError(xmlGenericErrorContext, "FullElem %s\n", elem->name);
+#endif
+    state = xmlRelaxNGNewValidState(ctxt, elem->parent);
+    if (state == NULL) {
+        return (-1);
+    }
+    state->seq = elem;
+    ctxt->state = state;
+    ctxt->errNo = XML_RELAXNG_OK;
+    ret = xmlRelaxNGValidateDefinition(ctxt, ctxt->pdef);
+    if ((ret != 0) || (ctxt->errNo != XML_RELAXNG_OK))
+        ret = -1;
+    else
+        ret = 1;
+    xmlRelaxNGFreeValidState(ctxt, ctxt->state);
+    ctxt->state = NULL;
+#ifdef DEBUG_PROGRESSIVE
+    if (ret < 0)
+        xmlGenericError(xmlGenericErrorContext, "FullElem %s failed\n",
+                        elem->name);
+#endif
+    return (ret);
+}
+
+/************************************************************************
+ *									*
+ *		Generic interpreted validation implementation		*
+ *									*
+ ************************************************************************/
+static int xmlRelaxNGValidateValue(xmlRelaxNGValidCtxtPtr ctxt,
+                                   xmlRelaxNGDefinePtr define);
+
+/**
+ * xmlRelaxNGSkipIgnored:
+ * @ctxt:  a schema validation context
+ * @node:  the top node.
+ *
+ * Skip ignorable nodes in that context
+ *
+ * Returns the new sibling or NULL in case of error.
+ */
+static xmlNodePtr
+xmlRelaxNGSkipIgnored(xmlRelaxNGValidCtxtPtr ctxt ATTRIBUTE_UNUSED,
+                      xmlNodePtr node)
+{
+    /*
+     * TODO complete and handle entities
+     */
+    while ((node != NULL) &&
+           ((node->type == XML_COMMENT_NODE) ||
+            (node->type == XML_PI_NODE) ||
+	    (node->type == XML_XINCLUDE_START) ||
+	    (node->type == XML_XINCLUDE_END) ||
+            (((node->type == XML_TEXT_NODE) ||
+              (node->type == XML_CDATA_SECTION_NODE)) &&
+             ((ctxt->flags & FLAGS_MIXED_CONTENT) ||
+              (IS_BLANK_NODE(node)))))) {
+        node = node->next;
+    }
+    return (node);
+}
+
+/**
+ * xmlRelaxNGNormalize:
+ * @ctxt:  a schema validation context
+ * @str:  the string to normalize
+ *
+ * Implements the  normalizeWhiteSpace( s ) function from
+ * section 6.2.9 of the spec
+ *
+ * Returns the new string or NULL in case of error.
+ */
+static xmlChar *
+xmlRelaxNGNormalize(xmlRelaxNGValidCtxtPtr ctxt, const xmlChar * str)
+{
+    xmlChar *ret, *p;
+    const xmlChar *tmp;
+    int len;
+
+    if (str == NULL)
+        return (NULL);
+    tmp = str;
+    while (*tmp != 0)
+        tmp++;
+    len = tmp - str;
+
+    ret = (xmlChar *) xmlMallocAtomic((len + 1) * sizeof(xmlChar));
+    if (ret == NULL) {
+        xmlRngVErrMemory(ctxt, "validating\n");
+        return (NULL);
+    }
+    p = ret;
+    while (IS_BLANK_CH(*str))
+        str++;
+    while (*str != 0) {
+        if (IS_BLANK_CH(*str)) {
+            while (IS_BLANK_CH(*str))
+                str++;
+            if (*str == 0)
+                break;
+            *p++ = ' ';
+        } else
+            *p++ = *str++;
+    }
+    *p = 0;
+    return (ret);
+}
+
+/**
+ * xmlRelaxNGValidateDatatype:
+ * @ctxt:  a Relax-NG validation context
+ * @value:  the string value
+ * @type:  the datatype definition
+ * @node:  the node
+ *
+ * Validate the given value against the dataype
+ *
+ * Returns 0 if the validation succeeded or an error code.
+ */
+static int
+xmlRelaxNGValidateDatatype(xmlRelaxNGValidCtxtPtr ctxt,
+                           const xmlChar * value,
+                           xmlRelaxNGDefinePtr define, xmlNodePtr node)
+{
+    int ret, tmp;
+    xmlRelaxNGTypeLibraryPtr lib;
+    void *result = NULL;
+    xmlRelaxNGDefinePtr cur;
+
+    if ((define == NULL) || (define->data == NULL)) {
+        return (-1);
+    }
+    lib = (xmlRelaxNGTypeLibraryPtr) define->data;
+    if (lib->check != NULL) {
+        if ((define->attrs != NULL) &&
+            (define->attrs->type == XML_RELAXNG_PARAM)) {
+            ret =
+                lib->check(lib->data, define->name, value, &result, node);
+        } else {
+            ret = lib->check(lib->data, define->name, value, NULL, node);
+        }
+    } else
+        ret = -1;
+    if (ret < 0) {
+        VALID_ERR2(XML_RELAXNG_ERR_TYPE, define->name);
+        if ((result != NULL) && (lib != NULL) && (lib->freef != NULL))
+            lib->freef(lib->data, result);
+        return (-1);
+    } else if (ret == 1) {
+        ret = 0;
+    } else if (ret == 2) {
+        VALID_ERR2P(XML_RELAXNG_ERR_DUPID, value);
+    } else {
+        VALID_ERR3P(XML_RELAXNG_ERR_TYPEVAL, define->name, value);
+        ret = -1;
+    }
+    cur = define->attrs;
+    while ((ret == 0) && (cur != NULL) && (cur->type == XML_RELAXNG_PARAM)) {
+        if (lib->facet != NULL) {
+            tmp = lib->facet(lib->data, define->name, cur->name,
+                             cur->value, value, result);
+            if (tmp != 0)
+                ret = -1;
+        }
+        cur = cur->next;
+    }
+    if ((ret == 0) && (define->content != NULL)) {
+        const xmlChar *oldvalue, *oldendvalue;
+
+        oldvalue = ctxt->state->value;
+        oldendvalue = ctxt->state->endvalue;
+        ctxt->state->value = (xmlChar *) value;
+        ctxt->state->endvalue = NULL;
+        ret = xmlRelaxNGValidateValue(ctxt, define->content);
+        ctxt->state->value = (xmlChar *) oldvalue;
+        ctxt->state->endvalue = (xmlChar *) oldendvalue;
+    }
+    if ((result != NULL) && (lib != NULL) && (lib->freef != NULL))
+        lib->freef(lib->data, result);
+    return (ret);
+}
+
+/**
+ * xmlRelaxNGNextValue:
+ * @ctxt:  a Relax-NG validation context
+ *
+ * Skip to the next value when validating within a list
+ *
+ * Returns 0 if the operation succeeded or an error code.
+ */
+static int
+xmlRelaxNGNextValue(xmlRelaxNGValidCtxtPtr ctxt)
+{
+    xmlChar *cur;
+
+    cur = ctxt->state->value;
+    if ((cur == NULL) || (ctxt->state->endvalue == NULL)) {
+        ctxt->state->value = NULL;
+        ctxt->state->endvalue = NULL;
+        return (0);
+    }
+    while (*cur != 0)
+        cur++;
+    while ((cur != ctxt->state->endvalue) && (*cur == 0))
+        cur++;
+    if (cur == ctxt->state->endvalue)
+        ctxt->state->value = NULL;
+    else
+        ctxt->state->value = cur;
+    return (0);
+}
+
+/**
+ * xmlRelaxNGValidateValueList:
+ * @ctxt:  a Relax-NG validation context
+ * @defines:  the list of definitions to verify
+ *
+ * Validate the given set of definitions for the current value
+ *
+ * Returns 0 if the validation succeeded or an error code.
+ */
+static int
+xmlRelaxNGValidateValueList(xmlRelaxNGValidCtxtPtr ctxt,
+                            xmlRelaxNGDefinePtr defines)
+{
+    int ret = 0;
+
+    while (defines != NULL) {
+        ret = xmlRelaxNGValidateValue(ctxt, defines);
+        if (ret != 0)
+            break;
+        defines = defines->next;
+    }
+    return (ret);
+}
+
+/**
+ * xmlRelaxNGValidateValue:
+ * @ctxt:  a Relax-NG validation context
+ * @define:  the definition to verify
+ *
+ * Validate the given definition for the current value
+ *
+ * Returns 0 if the validation succeeded or an error code.
+ */
+static int
+xmlRelaxNGValidateValue(xmlRelaxNGValidCtxtPtr ctxt,
+                        xmlRelaxNGDefinePtr define)
+{
+    int ret = 0, oldflags;
+    xmlChar *value;
+
+    value = ctxt->state->value;
+    switch (define->type) {
+        case XML_RELAXNG_EMPTY:{
+                if ((value != NULL) && (value[0] != 0)) {
+                    int idx = 0;
+
+                    while (IS_BLANK_CH(value[idx]))
+                        idx++;
+                    if (value[idx] != 0)
+                        ret = -1;
+                }
+                break;
+            }
+        case XML_RELAXNG_TEXT:
+            break;
+        case XML_RELAXNG_VALUE:{
+                if (!xmlStrEqual(value, define->value)) {
+                    if (define->name != NULL) {
+                        xmlRelaxNGTypeLibraryPtr lib;
+
+                        lib = (xmlRelaxNGTypeLibraryPtr) define->data;
+                        if ((lib != NULL) && (lib->comp != NULL)) {
+                            ret = lib->comp(lib->data, define->name,
+                                            define->value, define->node,
+                                            (void *) define->attrs,
+                                            value, ctxt->state->node);
+                        } else
+                            ret = -1;
+                        if (ret < 0) {
+                            VALID_ERR2(XML_RELAXNG_ERR_TYPECMP,
+                                       define->name);
+                            return (-1);
+                        } else if (ret == 1) {
+                            ret = 0;
+                        } else {
+                            ret = -1;
+                        }
+                    } else {
+                        xmlChar *nval, *nvalue;
+
+                        /*
+                         * TODO: trivial optimizations are possible by
+                         * computing at compile-time
+                         */
+                        nval = xmlRelaxNGNormalize(ctxt, define->value);
+                        nvalue = xmlRelaxNGNormalize(ctxt, value);
+
+                        if ((nval == NULL) || (nvalue == NULL) ||
+                            (!xmlStrEqual(nval, nvalue)))
+                            ret = -1;
+                        if (nval != NULL)
+                            xmlFree(nval);
+                        if (nvalue != NULL)
+                            xmlFree(nvalue);
+                    }
+                }
+                if (ret == 0)
+                    xmlRelaxNGNextValue(ctxt);
+                break;
+            }
+        case XML_RELAXNG_DATATYPE:{
+                ret = xmlRelaxNGValidateDatatype(ctxt, value, define,
+                                                 ctxt->state->seq);
+                if (ret == 0)
+                    xmlRelaxNGNextValue(ctxt);
+
+                break;
+            }
+        case XML_RELAXNG_CHOICE:{
+                xmlRelaxNGDefinePtr list = define->content;
+                xmlChar *oldvalue;
+
+                oldflags = ctxt->flags;
+                ctxt->flags |= FLAGS_IGNORABLE;
+
+                oldvalue = ctxt->state->value;
+                while (list != NULL) {
+                    ret = xmlRelaxNGValidateValue(ctxt, list);
+                    if (ret == 0) {
+                        break;
+                    }
+                    ctxt->state->value = oldvalue;
+                    list = list->next;
+                }
+                ctxt->flags = oldflags;
+                if (ret != 0) {
+                    if ((ctxt->flags & FLAGS_IGNORABLE) == 0)
+                        xmlRelaxNGDumpValidError(ctxt);
+                } else {
+                    if (ctxt->errNr > 0)
+                        xmlRelaxNGPopErrors(ctxt, 0);
+                }
+                break;
+            }
+        case XML_RELAXNG_LIST:{
+                xmlRelaxNGDefinePtr list = define->content;
+                xmlChar *oldvalue, *oldend, *val, *cur;
+
+#ifdef DEBUG_LIST
+                int nb_values = 0;
+#endif
+
+                oldvalue = ctxt->state->value;
+                oldend = ctxt->state->endvalue;
+
+                val = xmlStrdup(oldvalue);
+                if (val == NULL) {
+                    val = xmlStrdup(BAD_CAST "");
+                }
+                if (val == NULL) {
+                    VALID_ERR(XML_RELAXNG_ERR_NOSTATE);
+                    return (-1);
+                }
+                cur = val;
+                while (*cur != 0) {
+                    if (IS_BLANK_CH(*cur)) {
+                        *cur = 0;
+                        cur++;
+#ifdef DEBUG_LIST
+                        nb_values++;
+#endif
+                        while (IS_BLANK_CH(*cur))
+                            *cur++ = 0;
+                    } else
+                        cur++;
+                }
+#ifdef DEBUG_LIST
+                xmlGenericError(xmlGenericErrorContext,
+                                "list value: '%s' found %d items\n",
+                                oldvalue, nb_values);
+                nb_values = 0;
+#endif
+                ctxt->state->endvalue = cur;
+                cur = val;
+                while ((*cur == 0) && (cur != ctxt->state->endvalue))
+                    cur++;
+
+                ctxt->state->value = cur;
+
+                while (list != NULL) {
+                    if (ctxt->state->value == ctxt->state->endvalue)
+                        ctxt->state->value = NULL;
+                    ret = xmlRelaxNGValidateValue(ctxt, list);
+                    if (ret != 0) {
+#ifdef DEBUG_LIST
+                        xmlGenericError(xmlGenericErrorContext,
+                                        "Failed to validate value: '%s' with %d rule\n",
+                                        ctxt->state->value, nb_values);
+#endif
+                        break;
+                    }
+#ifdef DEBUG_LIST
+                    nb_values++;
+#endif
+                    list = list->next;
+                }
+
+                if ((ret == 0) && (ctxt->state->value != NULL) &&
+                    (ctxt->state->value != ctxt->state->endvalue)) {
+                    VALID_ERR2(XML_RELAXNG_ERR_LISTEXTRA,
+                               ctxt->state->value);
+                    ret = -1;
+                }
+                xmlFree(val);
+                ctxt->state->value = oldvalue;
+                ctxt->state->endvalue = oldend;
+                break;
+            }
+        case XML_RELAXNG_ONEORMORE:
+            ret = xmlRelaxNGValidateValueList(ctxt, define->content);
+            if (ret != 0) {
+                break;
+            }
+            /* no break on purpose */
+        case XML_RELAXNG_ZEROORMORE:{
+                xmlChar *cur, *temp;
+
+                if ((ctxt->state->value == NULL) ||
+                    (*ctxt->state->value == 0)) {
+                    ret = 0;
+                    break;
+                }
+                oldflags = ctxt->flags;
+                ctxt->flags |= FLAGS_IGNORABLE;
+                cur = ctxt->state->value;
+                temp = NULL;
+                while ((cur != NULL) && (cur != ctxt->state->endvalue) &&
+                       (temp != cur)) {
+                    temp = cur;
+                    ret =
+                        xmlRelaxNGValidateValueList(ctxt, define->content);
+                    if (ret != 0) {
+                        ctxt->state->value = temp;
+                        ret = 0;
+                        break;
+                    }
+                    cur = ctxt->state->value;
+                }
+                ctxt->flags = oldflags;
+		if (ctxt->errNr > 0)
+		    xmlRelaxNGPopErrors(ctxt, 0);
+                break;
+            }
+        case XML_RELAXNG_OPTIONAL:{
+                xmlChar *temp;
+
+                if ((ctxt->state->value == NULL) ||
+                    (*ctxt->state->value == 0)) {
+                    ret = 0;
+                    break;
+                }
+                oldflags = ctxt->flags;
+                ctxt->flags |= FLAGS_IGNORABLE;
+                temp = ctxt->state->value;
+                ret = xmlRelaxNGValidateValue(ctxt, define->content);
+                ctxt->flags = oldflags;
+                if (ret != 0) {
+                    ctxt->state->value = temp;
+                    if (ctxt->errNr > 0)
+                        xmlRelaxNGPopErrors(ctxt, 0);
+                    ret = 0;
+                    break;
+                }
+		if (ctxt->errNr > 0)
+		    xmlRelaxNGPopErrors(ctxt, 0);
+                break;
+            }
+        case XML_RELAXNG_EXCEPT:{
+                xmlRelaxNGDefinePtr list;
+
+                list = define->content;
+                while (list != NULL) {
+                    ret = xmlRelaxNGValidateValue(ctxt, list);
+                    if (ret == 0) {
+                        ret = -1;
+                        break;
+                    } else
+                        ret = 0;
+                    list = list->next;
+                }
+                break;
+            }
+        case XML_RELAXNG_DEF:
+        case XML_RELAXNG_GROUP:{
+                xmlRelaxNGDefinePtr list;
+
+                list = define->content;
+                while (list != NULL) {
+                    ret = xmlRelaxNGValidateValue(ctxt, list);
+                    if (ret != 0) {
+                        ret = -1;
+                        break;
+                    } else
+                        ret = 0;
+                    list = list->next;
+                }
+                break;
+            }
+        case XML_RELAXNG_REF:
+        case XML_RELAXNG_PARENTREF:
+	    if (define->content == NULL) {
+                VALID_ERR(XML_RELAXNG_ERR_NODEFINE);
+                ret = -1;
+	    } else {
+                ret = xmlRelaxNGValidateValue(ctxt, define->content);
+            }
+            break;
+        default:
+            TODO ret = -1;
+    }
+    return (ret);
+}
+
+/**
+ * xmlRelaxNGValidateValueContent:
+ * @ctxt:  a Relax-NG validation context
+ * @defines:  the list of definitions to verify
+ *
+ * Validate the given definitions for the current value
+ *
+ * Returns 0 if the validation succeeded or an error code.
+ */
+static int
+xmlRelaxNGValidateValueContent(xmlRelaxNGValidCtxtPtr ctxt,
+                               xmlRelaxNGDefinePtr defines)
+{
+    int ret = 0;
+
+    while (defines != NULL) {
+        ret = xmlRelaxNGValidateValue(ctxt, defines);
+        if (ret != 0)
+            break;
+        defines = defines->next;
+    }
+    return (ret);
+}
+
+/**
+ * xmlRelaxNGAttributeMatch:
+ * @ctxt:  a Relax-NG validation context
+ * @define:  the definition to check
+ * @prop:  the attribute
+ *
+ * Check if the attribute matches the definition nameClass
+ *
+ * Returns 1 if the attribute matches, 0 if no, or -1 in case of error
+ */
+static int
+xmlRelaxNGAttributeMatch(xmlRelaxNGValidCtxtPtr ctxt,
+                         xmlRelaxNGDefinePtr define, xmlAttrPtr prop)
+{
+    int ret;
+
+    if (define->name != NULL) {
+        if (!xmlStrEqual(define->name, prop->name))
+            return (0);
+    }
+    if (define->ns != NULL) {
+        if (define->ns[0] == 0) {
+            if (prop->ns != NULL)
+                return (0);
+        } else {
+            if ((prop->ns == NULL) ||
+                (!xmlStrEqual(define->ns, prop->ns->href)))
+                return (0);
+        }
+    }
+    if (define->nameClass == NULL)
+        return (1);
+    define = define->nameClass;
+    if (define->type == XML_RELAXNG_EXCEPT) {
+        xmlRelaxNGDefinePtr list;
+
+        list = define->content;
+        while (list != NULL) {
+            ret = xmlRelaxNGAttributeMatch(ctxt, list, prop);
+            if (ret == 1)
+                return (0);
+            if (ret < 0)
+                return (ret);
+            list = list->next;
+        }
+    } else if (define->type == XML_RELAXNG_CHOICE) {
+        xmlRelaxNGDefinePtr list;
+
+        list = define->nameClass;
+        while (list != NULL) {
+            ret = xmlRelaxNGAttributeMatch(ctxt, list, prop);
+            if (ret == 1)
+                return (1);
+            if (ret < 0)
+                return (ret);
+            list = list->next;
+        }
+        return (0);
+    } else {
+    TODO}
+    return (1);
+}
+
+/**
+ * xmlRelaxNGValidateAttribute:
+ * @ctxt:  a Relax-NG validation context
+ * @define:  the definition to verify
+ *
+ * Validate the given attribute definition for that node
+ *
+ * Returns 0 if the validation succeeded or an error code.
+ */
+static int
+xmlRelaxNGValidateAttribute(xmlRelaxNGValidCtxtPtr ctxt,
+                            xmlRelaxNGDefinePtr define)
+{
+    int ret = 0, i;
+    xmlChar *value, *oldvalue;
+    xmlAttrPtr prop = NULL, tmp;
+    xmlNodePtr oldseq;
+
+    if (ctxt->state->nbAttrLeft <= 0)
+        return (-1);
+    if (define->name != NULL) {
+        for (i = 0; i < ctxt->state->nbAttrs; i++) {
+            tmp = ctxt->state->attrs[i];
+            if ((tmp != NULL) && (xmlStrEqual(define->name, tmp->name))) {
+                if ((((define->ns == NULL) || (define->ns[0] == 0)) &&
+                     (tmp->ns == NULL)) ||
+                    ((tmp->ns != NULL) &&
+                     (xmlStrEqual(define->ns, tmp->ns->href)))) {
+                    prop = tmp;
+                    break;
+                }
+            }
+        }
+        if (prop != NULL) {
+            value = xmlNodeListGetString(prop->doc, prop->children, 1);
+            oldvalue = ctxt->state->value;
+            oldseq = ctxt->state->seq;
+            ctxt->state->seq = (xmlNodePtr) prop;
+            ctxt->state->value = value;
+            ctxt->state->endvalue = NULL;
+            ret = xmlRelaxNGValidateValueContent(ctxt, define->content);
+            if (ctxt->state->value != NULL)
+                value = ctxt->state->value;
+            if (value != NULL)
+                xmlFree(value);
+            ctxt->state->value = oldvalue;
+            ctxt->state->seq = oldseq;
+            if (ret == 0) {
+                /*
+                 * flag the attribute as processed
+                 */
+                ctxt->state->attrs[i] = NULL;
+                ctxt->state->nbAttrLeft--;
+            }
+        } else {
+            ret = -1;
+        }
+#ifdef DEBUG
+        xmlGenericError(xmlGenericErrorContext,
+                        "xmlRelaxNGValidateAttribute(%s): %d\n",
+                        define->name, ret);
+#endif
+    } else {
+        for (i = 0; i < ctxt->state->nbAttrs; i++) {
+            tmp = ctxt->state->attrs[i];
+            if ((tmp != NULL) &&
+                (xmlRelaxNGAttributeMatch(ctxt, define, tmp) == 1)) {
+                prop = tmp;
+                break;
+            }
+        }
+        if (prop != NULL) {
+            value = xmlNodeListGetString(prop->doc, prop->children, 1);
+            oldvalue = ctxt->state->value;
+            oldseq = ctxt->state->seq;
+            ctxt->state->seq = (xmlNodePtr) prop;
+            ctxt->state->value = value;
+            ret = xmlRelaxNGValidateValueContent(ctxt, define->content);
+            if (ctxt->state->value != NULL)
+                value = ctxt->state->value;
+            if (value != NULL)
+                xmlFree(value);
+            ctxt->state->value = oldvalue;
+            ctxt->state->seq = oldseq;
+            if (ret == 0) {
+                /*
+                 * flag the attribute as processed
+                 */
+                ctxt->state->attrs[i] = NULL;
+                ctxt->state->nbAttrLeft--;
+            }
+        } else {
+            ret = -1;
+        }
+#ifdef DEBUG
+        if (define->ns != NULL) {
+            xmlGenericError(xmlGenericErrorContext,
+                            "xmlRelaxNGValidateAttribute(nsName ns = %s): %d\n",
+                            define->ns, ret);
+        } else {
+            xmlGenericError(xmlGenericErrorContext,
+                            "xmlRelaxNGValidateAttribute(anyName): %d\n",
+                            ret);
+        }
+#endif
+    }
+
+    return (ret);
+}
+
+/**
+ * xmlRelaxNGValidateAttributeList:
+ * @ctxt:  a Relax-NG validation context
+ * @define:  the list of definition to verify
+ *
+ * Validate the given node against the list of attribute definitions
+ *
+ * Returns 0 if the validation succeeded or an error code.
+ */
+static int
+xmlRelaxNGValidateAttributeList(xmlRelaxNGValidCtxtPtr ctxt,
+                                xmlRelaxNGDefinePtr defines)
+{
+    int ret = 0, res;
+    int needmore = 0;
+    xmlRelaxNGDefinePtr cur;
+
+    cur = defines;
+    while (cur != NULL) {
+        if (cur->type == XML_RELAXNG_ATTRIBUTE) {
+            if (xmlRelaxNGValidateAttribute(ctxt, cur) != 0)
+                ret = -1;
+        } else
+            needmore = 1;
+        cur = cur->next;
+    }
+    if (!needmore)
+        return (ret);
+    cur = defines;
+    while (cur != NULL) {
+        if (cur->type != XML_RELAXNG_ATTRIBUTE) {
+            if ((ctxt->state != NULL) || (ctxt->states != NULL)) {
+                res = xmlRelaxNGValidateDefinition(ctxt, cur);
+                if (res < 0)
+                    ret = -1;
+            } else {
+                VALID_ERR(XML_RELAXNG_ERR_NOSTATE);
+                return (-1);
+            }
+            if (res == -1)      /* continues on -2 */
+                break;
+        }
+        cur = cur->next;
+    }
+
+    return (ret);
+}
+
+/**
+ * xmlRelaxNGNodeMatchesList:
+ * @node:  the node
+ * @list:  a NULL terminated array of definitions
+ *
+ * Check if a node can be matched by one of the definitions
+ *
+ * Returns 1 if matches 0 otherwise
+ */
+static int
+xmlRelaxNGNodeMatchesList(xmlNodePtr node, xmlRelaxNGDefinePtr * list)
+{
+    xmlRelaxNGDefinePtr cur;
+    int i = 0, tmp;
+
+    if ((node == NULL) || (list == NULL))
+        return (0);
+
+    cur = list[i++];
+    while (cur != NULL) {
+        if ((node->type == XML_ELEMENT_NODE) &&
+            (cur->type == XML_RELAXNG_ELEMENT)) {
+            tmp = xmlRelaxNGElementMatch(NULL, cur, node);
+            if (tmp == 1)
+                return (1);
+        } else if (((node->type == XML_TEXT_NODE) ||
+                    (node->type == XML_CDATA_SECTION_NODE)) &&
+                   (cur->type == XML_RELAXNG_TEXT)) {
+            return (1);
+        }
+        cur = list[i++];
+    }
+    return (0);
+}
+
+/**
+ * xmlRelaxNGValidateInterleave:
+ * @ctxt:  a Relax-NG validation context
+ * @define:  the definition to verify
+ *
+ * Validate an interleave definition for a node.
+ *
+ * Returns 0 if the validation succeeded or an error code.
+ */
+static int
+xmlRelaxNGValidateInterleave(xmlRelaxNGValidCtxtPtr ctxt,
+                             xmlRelaxNGDefinePtr define)
+{
+    int ret = 0, i, nbgroups;
+    int errNr = ctxt->errNr;
+    int oldflags;
+
+    xmlRelaxNGValidStatePtr oldstate;
+    xmlRelaxNGPartitionPtr partitions;
+    xmlRelaxNGInterleaveGroupPtr group = NULL;
+    xmlNodePtr cur, start, last = NULL, lastchg = NULL, lastelem;
+    xmlNodePtr *list = NULL, *lasts = NULL;
+
+    if (define->data != NULL) {
+        partitions = (xmlRelaxNGPartitionPtr) define->data;
+        nbgroups = partitions->nbgroups;
+    } else {
+        VALID_ERR(XML_RELAXNG_ERR_INTERNODATA);
+        return (-1);
+    }
+    /*
+     * Optimizations for MIXED
+     */
+    oldflags = ctxt->flags;
+    if (define->dflags & IS_MIXED) {
+        ctxt->flags |= FLAGS_MIXED_CONTENT;
+        if (nbgroups == 2) {
+            /*
+             * this is a pure <mixed> case
+             */
+            if (ctxt->state != NULL)
+                ctxt->state->seq = xmlRelaxNGSkipIgnored(ctxt,
+                                                         ctxt->state->seq);
+            if (partitions->groups[0]->rule->type == XML_RELAXNG_TEXT)
+                ret = xmlRelaxNGValidateDefinition(ctxt,
+                                                   partitions->groups[1]->
+                                                   rule);
+            else
+                ret = xmlRelaxNGValidateDefinition(ctxt,
+                                                   partitions->groups[0]->
+                                                   rule);
+            if (ret == 0) {
+                if (ctxt->state != NULL)
+                    ctxt->state->seq = xmlRelaxNGSkipIgnored(ctxt,
+                                                             ctxt->state->
+                                                             seq);
+            }
+            ctxt->flags = oldflags;
+            return (ret);
+        }
+    }
+
+    /*
+     * Build arrays to store the first and last node of the chain
+     * pertaining to each group
+     */
+    list = (xmlNodePtr *) xmlMalloc(nbgroups * sizeof(xmlNodePtr));
+    if (list == NULL) {
+        xmlRngVErrMemory(ctxt, "validating\n");
+        return (-1);
+    }
+    memset(list, 0, nbgroups * sizeof(xmlNodePtr));
+    lasts = (xmlNodePtr *) xmlMalloc(nbgroups * sizeof(xmlNodePtr));
+    if (lasts == NULL) {
+        xmlRngVErrMemory(ctxt, "validating\n");
+        return (-1);
+    }
+    memset(lasts, 0, nbgroups * sizeof(xmlNodePtr));
+
+    /*
+     * Walk the sequence of children finding the right group and
+     * sorting them in sequences.
+     */
+    cur = ctxt->state->seq;
+    cur = xmlRelaxNGSkipIgnored(ctxt, cur);
+    start = cur;
+    while (cur != NULL) {
+        ctxt->state->seq = cur;
+        if ((partitions->triage != NULL) &&
+            (partitions->flags & IS_DETERMINIST)) {
+            void *tmp = NULL;
+
+            if ((cur->type == XML_TEXT_NODE) ||
+                (cur->type == XML_CDATA_SECTION_NODE)) {
+                tmp = xmlHashLookup2(partitions->triage, BAD_CAST "#text",
+                                     NULL);
+            } else if (cur->type == XML_ELEMENT_NODE) {
+                if (cur->ns != NULL) {
+                    tmp = xmlHashLookup2(partitions->triage, cur->name,
+                                         cur->ns->href);
+                    if (tmp == NULL)
+                        tmp = xmlHashLookup2(partitions->triage,
+                                             BAD_CAST "#any",
+                                             cur->ns->href);
+                } else
+                    tmp =
+                        xmlHashLookup2(partitions->triage, cur->name,
+                                       NULL);
+                if (tmp == NULL)
+                    tmp =
+                        xmlHashLookup2(partitions->triage, BAD_CAST "#any",
+                                       NULL);
+            }
+
+            if (tmp == NULL) {
+                i = nbgroups;
+            } else {
+                i = ((long) tmp) - 1;
+                if (partitions->flags & IS_NEEDCHECK) {
+                    group = partitions->groups[i];
+                    if (!xmlRelaxNGNodeMatchesList(cur, group->defs))
+                        i = nbgroups;
+                }
+            }
+        } else {
+            for (i = 0; i < nbgroups; i++) {
+                group = partitions->groups[i];
+                if (group == NULL)
+                    continue;
+                if (xmlRelaxNGNodeMatchesList(cur, group->defs))
+                    break;
+            }
+        }
+        /*
+         * We break as soon as an element not matched is found
+         */
+        if (i >= nbgroups) {
+            break;
+        }
+        if (lasts[i] != NULL) {
+            lasts[i]->next = cur;
+            lasts[i] = cur;
+        } else {
+            list[i] = cur;
+            lasts[i] = cur;
+        }
+        if (cur->next != NULL)
+            lastchg = cur->next;
+        else
+            lastchg = cur;
+        cur = xmlRelaxNGSkipIgnored(ctxt, cur->next);
+    }
+    if (ret != 0) {
+        VALID_ERR(XML_RELAXNG_ERR_INTERSEQ);
+        ret = -1;
+        goto done;
+    }
+    lastelem = cur;
+    oldstate = ctxt->state;
+    for (i = 0; i < nbgroups; i++) {
+        ctxt->state = xmlRelaxNGCopyValidState(ctxt, oldstate);
+	if (ctxt->state == NULL) {
+	    ret = -1;
+	    break;
+	}
+        group = partitions->groups[i];
+        if (lasts[i] != NULL) {
+            last = lasts[i]->next;
+            lasts[i]->next = NULL;
+        }
+        ctxt->state->seq = list[i];
+        ret = xmlRelaxNGValidateDefinition(ctxt, group->rule);
+        if (ret != 0)
+            break;
+        if (ctxt->state != NULL) {
+            cur = ctxt->state->seq;
+            cur = xmlRelaxNGSkipIgnored(ctxt, cur);
+            xmlRelaxNGFreeValidState(ctxt, oldstate);
+            oldstate = ctxt->state;
+            ctxt->state = NULL;
+            if (cur != NULL) {
+                VALID_ERR2(XML_RELAXNG_ERR_INTEREXTRA, cur->name);
+                ret = -1;
+                ctxt->state = oldstate;
+                goto done;
+            }
+        } else if (ctxt->states != NULL) {
+            int j;
+            int found = 0;
+	    int best = -1;
+	    int lowattr = -1;
+
+	    /*
+	     * PBM: what happen if there is attributes checks in the interleaves
+	     */
+
+            for (j = 0; j < ctxt->states->nbState; j++) {
+                cur = ctxt->states->tabState[j]->seq;
+                cur = xmlRelaxNGSkipIgnored(ctxt, cur);
+                if (cur == NULL) {
+		    if (found == 0) {
+		        lowattr = ctxt->states->tabState[j]->nbAttrLeft;
+			best = j;
+		    }
+                    found = 1;
+		    if (ctxt->states->tabState[j]->nbAttrLeft <= lowattr) {
+		        /* try  to keep the latest one to mach old heuristic */
+		        lowattr = ctxt->states->tabState[j]->nbAttrLeft;
+			best = j;
+		    }
+                    if (lowattr == 0)
+		        break;
+                } else if (found == 0) {
+                    if (lowattr == -1) {
+		        lowattr = ctxt->states->tabState[j]->nbAttrLeft;
+			best = j;
+		    } else
+		    if (ctxt->states->tabState[j]->nbAttrLeft <= lowattr)  {
+		        /* try  to keep the latest one to mach old heuristic */
+		        lowattr = ctxt->states->tabState[j]->nbAttrLeft;
+			best = j;
+		    }
+		}
+            }
+	    /*
+	     * BIG PBM: here we pick only one restarting point :-(
+	     */
+            if (ctxt->states->nbState > 0) {
+                xmlRelaxNGFreeValidState(ctxt, oldstate);
+		if (best != -1) {
+		    oldstate = ctxt->states->tabState[best];
+		    ctxt->states->tabState[best] = NULL;
+		} else {
+		    oldstate =
+			ctxt->states->tabState[ctxt->states->nbState - 1];
+                    ctxt->states->tabState[ctxt->states->nbState - 1] = NULL;
+                    ctxt->states->nbState--;
+		}
+            }
+            for (j = 0; j < ctxt->states->nbState ; j++) {
+                xmlRelaxNGFreeValidState(ctxt, ctxt->states->tabState[j]);
+            }
+            xmlRelaxNGFreeStates(ctxt, ctxt->states);
+            ctxt->states = NULL;
+            if (found == 0) {
+                if (cur == NULL) {
+		    VALID_ERR2(XML_RELAXNG_ERR_INTEREXTRA,
+			       (const xmlChar *) "noname");
+                } else {
+                    VALID_ERR2(XML_RELAXNG_ERR_INTEREXTRA, cur->name);
+                }
+                ret = -1;
+                ctxt->state = oldstate;
+                goto done;
+            }
+        } else {
+            ret = -1;
+            break;
+        }
+        if (lasts[i] != NULL) {
+            lasts[i]->next = last;
+        }
+    }
+    if (ctxt->state != NULL)
+        xmlRelaxNGFreeValidState(ctxt, ctxt->state);
+    ctxt->state = oldstate;
+    ctxt->state->seq = lastelem;
+    if (ret != 0) {
+        VALID_ERR(XML_RELAXNG_ERR_INTERSEQ);
+        ret = -1;
+        goto done;
+    }
+
+  done:
+    ctxt->flags = oldflags;
+    /*
+     * builds the next links chain from the prev one
+     */
+    cur = lastchg;
+    while (cur != NULL) {
+        if ((cur == start) || (cur->prev == NULL))
+            break;
+        cur->prev->next = cur;
+        cur = cur->prev;
+    }
+    if (ret == 0) {
+        if (ctxt->errNr > errNr)
+            xmlRelaxNGPopErrors(ctxt, errNr);
+    }
+
+    xmlFree(list);
+    xmlFree(lasts);
+    return (ret);
+}
+
+/**
+ * xmlRelaxNGValidateDefinitionList:
+ * @ctxt:  a Relax-NG validation context
+ * @define:  the list of definition to verify
+ *
+ * Validate the given node content against the (list) of definitions
+ *
+ * Returns 0 if the validation succeeded or an error code.
+ */
+static int
+xmlRelaxNGValidateDefinitionList(xmlRelaxNGValidCtxtPtr ctxt,
+                                 xmlRelaxNGDefinePtr defines)
+{
+    int ret = 0, res;
+
+
+    if (defines == NULL) {
+        VALID_ERR2(XML_RELAXNG_ERR_INTERNAL,
+                   BAD_CAST "NULL definition list");
+        return (-1);
+    }
+    while (defines != NULL) {
+        if ((ctxt->state != NULL) || (ctxt->states != NULL)) {
+            res = xmlRelaxNGValidateDefinition(ctxt, defines);
+            if (res < 0)
+                ret = -1;
+        } else {
+            VALID_ERR(XML_RELAXNG_ERR_NOSTATE);
+            return (-1);
+        }
+        if (res == -1)          /* continues on -2 */
+            break;
+        defines = defines->next;
+    }
+
+    return (ret);
+}
+
+/**
+ * xmlRelaxNGElementMatch:
+ * @ctxt:  a Relax-NG validation context
+ * @define:  the definition to check
+ * @elem:  the element
+ *
+ * Check if the element matches the definition nameClass
+ *
+ * Returns 1 if the element matches, 0 if no, or -1 in case of error
+ */
+static int
+xmlRelaxNGElementMatch(xmlRelaxNGValidCtxtPtr ctxt,
+                       xmlRelaxNGDefinePtr define, xmlNodePtr elem)
+{
+    int ret = 0, oldflags = 0;
+
+    if (define->name != NULL) {
+        if (!xmlStrEqual(elem->name, define->name)) {
+            VALID_ERR3(XML_RELAXNG_ERR_ELEMNAME, define->name, elem->name);
+            return (0);
+        }
+    }
+    if ((define->ns != NULL) && (define->ns[0] != 0)) {
+        if (elem->ns == NULL) {
+            VALID_ERR2(XML_RELAXNG_ERR_ELEMNONS, elem->name);
+            return (0);
+        } else if (!xmlStrEqual(elem->ns->href, define->ns)) {
+            VALID_ERR3(XML_RELAXNG_ERR_ELEMWRONGNS,
+                       elem->name, define->ns);
+            return (0);
+        }
+    } else if ((elem->ns != NULL) && (define->ns != NULL) &&
+               (define->name == NULL)) {
+        VALID_ERR2(XML_RELAXNG_ERR_ELEMEXTRANS, elem->name);
+        return (0);
+    } else if ((elem->ns != NULL) && (define->name != NULL)) {
+        VALID_ERR2(XML_RELAXNG_ERR_ELEMEXTRANS, define->name);
+        return (0);
+    }
+
+    if (define->nameClass == NULL)
+        return (1);
+
+    define = define->nameClass;
+    if (define->type == XML_RELAXNG_EXCEPT) {
+        xmlRelaxNGDefinePtr list;
+
+        if (ctxt != NULL) {
+            oldflags = ctxt->flags;
+            ctxt->flags |= FLAGS_IGNORABLE;
+        }
+
+        list = define->content;
+        while (list != NULL) {
+            ret = xmlRelaxNGElementMatch(ctxt, list, elem);
+            if (ret == 1) {
+                if (ctxt != NULL)
+                    ctxt->flags = oldflags;
+                return (0);
+            }
+            if (ret < 0) {
+                if (ctxt != NULL)
+                    ctxt->flags = oldflags;
+                return (ret);
+            }
+            list = list->next;
+        }
+        ret = 1;
+        if (ctxt != NULL) {
+            ctxt->flags = oldflags;
+        }
+    } else if (define->type == XML_RELAXNG_CHOICE) {
+        xmlRelaxNGDefinePtr list;
+
+        if (ctxt != NULL) {
+            oldflags = ctxt->flags;
+            ctxt->flags |= FLAGS_IGNORABLE;
+        }
+
+        list = define->nameClass;
+        while (list != NULL) {
+            ret = xmlRelaxNGElementMatch(ctxt, list, elem);
+            if (ret == 1) {
+                if (ctxt != NULL)
+                    ctxt->flags = oldflags;
+                return (1);
+            }
+            if (ret < 0) {
+                if (ctxt != NULL)
+                    ctxt->flags = oldflags;
+                return (ret);
+            }
+            list = list->next;
+        }
+        if (ctxt != NULL) {
+            if (ret != 0) {
+                if ((ctxt->flags & FLAGS_IGNORABLE) == 0)
+                    xmlRelaxNGDumpValidError(ctxt);
+            } else {
+                if (ctxt->errNr > 0)
+                    xmlRelaxNGPopErrors(ctxt, 0);
+            }
+        }
+        ret = 0;
+        if (ctxt != NULL) {
+            ctxt->flags = oldflags;
+        }
+    } else {
+        TODO ret = -1;
+    }
+    return (ret);
+}
+
+/**
+ * xmlRelaxNGBestState:
+ * @ctxt:  a Relax-NG validation context
+ *
+ * Find the "best" state in the ctxt->states list of states to report
+ * errors about. I.e. a state with no element left in the child list
+ * or the one with the less attributes left.
+ * This is called only if a falidation error was detected
+ *
+ * Returns the index of the "best" state or -1 in case of error
+ */
+static int
+xmlRelaxNGBestState(xmlRelaxNGValidCtxtPtr ctxt)
+{
+    xmlRelaxNGValidStatePtr state;
+    int i, tmp;
+    int best = -1;
+    int value = 1000000;
+
+    if ((ctxt == NULL) || (ctxt->states == NULL) ||
+        (ctxt->states->nbState <= 0))
+        return (-1);
+
+    for (i = 0; i < ctxt->states->nbState; i++) {
+        state = ctxt->states->tabState[i];
+        if (state == NULL)
+            continue;
+        if (state->seq != NULL) {
+            if ((best == -1) || (value > 100000)) {
+                value = 100000;
+                best = i;
+            }
+        } else {
+            tmp = state->nbAttrLeft;
+            if ((best == -1) || (value > tmp)) {
+                value = tmp;
+                best = i;
+            }
+        }
+    }
+    return (best);
+}
+
+/**
+ * xmlRelaxNGLogBestError:
+ * @ctxt:  a Relax-NG validation context
+ *
+ * Find the "best" state in the ctxt->states list of states to report
+ * errors about and log it.
+ */
+static void
+xmlRelaxNGLogBestError(xmlRelaxNGValidCtxtPtr ctxt)
+{
+    int best;
+
+    if ((ctxt == NULL) || (ctxt->states == NULL) ||
+        (ctxt->states->nbState <= 0))
+        return;
+
+    best = xmlRelaxNGBestState(ctxt);
+    if ((best >= 0) && (best < ctxt->states->nbState)) {
+        ctxt->state = ctxt->states->tabState[best];
+
+        xmlRelaxNGValidateElementEnd(ctxt, 1);
+    }
+}
+
+/**
+ * xmlRelaxNGValidateElementEnd:
+ * @ctxt:  a Relax-NG validation context
+ * @dolog:  indicate that error logging should be done
+ *
+ * Validate the end of the element, implements check that
+ * there is nothing left not consumed in the element content
+ * or in the attribute list.
+ *
+ * Returns 0 if the validation succeeded or an error code.
+ */
+static int
+xmlRelaxNGValidateElementEnd(xmlRelaxNGValidCtxtPtr ctxt, int dolog)
+{
+    int i;
+    xmlRelaxNGValidStatePtr state;
+
+    state = ctxt->state;
+    if (state->seq != NULL) {
+        state->seq = xmlRelaxNGSkipIgnored(ctxt, state->seq);
+        if (state->seq != NULL) {
+            if (dolog) {
+                VALID_ERR3(XML_RELAXNG_ERR_EXTRACONTENT,
+                           state->node->name, state->seq->name);
+            }
+            return (-1);
+        }
+    }
+    for (i = 0; i < state->nbAttrs; i++) {
+        if (state->attrs[i] != NULL) {
+            if (dolog) {
+                VALID_ERR3(XML_RELAXNG_ERR_INVALIDATTR,
+                           state->attrs[i]->name, state->node->name);
+            }
+            return (-1 - i);
+        }
+    }
+    return (0);
+}
+
+/**
+ * xmlRelaxNGValidateState:
+ * @ctxt:  a Relax-NG validation context
+ * @define:  the definition to verify
+ *
+ * Validate the current state against the definition
+ *
+ * Returns 0 if the validation succeeded or an error code.
+ */
+static int
+xmlRelaxNGValidateState(xmlRelaxNGValidCtxtPtr ctxt,
+                        xmlRelaxNGDefinePtr define)
+{
+    xmlNodePtr node;
+    int ret = 0, i, tmp, oldflags, errNr;
+    xmlRelaxNGValidStatePtr oldstate = NULL, state;
+
+    if (define == NULL) {
+        VALID_ERR(XML_RELAXNG_ERR_NODEFINE);
+        return (-1);
+    }
+
+    if (ctxt->state != NULL) {
+        node = ctxt->state->seq;
+    } else {
+        node = NULL;
+    }
+#ifdef DEBUG
+    for (i = 0; i < ctxt->depth; i++)
+        xmlGenericError(xmlGenericErrorContext, " ");
+    xmlGenericError(xmlGenericErrorContext,
+                    "Start validating %s ", xmlRelaxNGDefName(define));
+    if (define->name != NULL)
+        xmlGenericError(xmlGenericErrorContext, "%s ", define->name);
+    if ((node != NULL) && (node->name != NULL))
+        xmlGenericError(xmlGenericErrorContext, "on %s\n", node->name);
+    else
+        xmlGenericError(xmlGenericErrorContext, "\n");
+#endif
+    ctxt->depth++;
+    switch (define->type) {
+        case XML_RELAXNG_EMPTY:
+            xmlRelaxNGSkipIgnored(ctxt, node);
+            ret = 0;
+            break;
+        case XML_RELAXNG_NOT_ALLOWED:
+            ret = -1;
+            break;
+        case XML_RELAXNG_TEXT:
+            while ((node != NULL) &&
+                   ((node->type == XML_TEXT_NODE) ||
+                    (node->type == XML_COMMENT_NODE) ||
+                    (node->type == XML_PI_NODE) ||
+                    (node->type == XML_CDATA_SECTION_NODE)))
+                node = node->next;
+            ctxt->state->seq = node;
+            break;
+        case XML_RELAXNG_ELEMENT:
+            errNr = ctxt->errNr;
+            node = xmlRelaxNGSkipIgnored(ctxt, node);
+            if (node == NULL) {
+                VALID_ERR2(XML_RELAXNG_ERR_NOELEM, define->name);
+                ret = -1;
+                if ((ctxt->flags & FLAGS_IGNORABLE) == 0)
+                    xmlRelaxNGDumpValidError(ctxt);
+                break;
+            }
+            if (node->type != XML_ELEMENT_NODE) {
+                VALID_ERR(XML_RELAXNG_ERR_NOTELEM);
+                ret = -1;
+                if ((ctxt->flags & FLAGS_IGNORABLE) == 0)
+                    xmlRelaxNGDumpValidError(ctxt);
+                break;
+            }
+            /*
+             * This node was already validated successfully against
+             * this definition.
+             */
+            if (node->psvi == define) {
+                ctxt->state->seq = xmlRelaxNGSkipIgnored(ctxt, node->next);
+                if (ctxt->errNr > errNr)
+                    xmlRelaxNGPopErrors(ctxt, errNr);
+                if (ctxt->errNr != 0) {
+                    while ((ctxt->err != NULL) &&
+                           (((ctxt->err->err == XML_RELAXNG_ERR_ELEMNAME)
+                             && (xmlStrEqual(ctxt->err->arg2, node->name)))
+                            ||
+                            ((ctxt->err->err ==
+                              XML_RELAXNG_ERR_ELEMEXTRANS)
+                             && (xmlStrEqual(ctxt->err->arg1, node->name)))
+                            || (ctxt->err->err == XML_RELAXNG_ERR_NOELEM)
+                            || (ctxt->err->err ==
+                                XML_RELAXNG_ERR_NOTELEM)))
+                        xmlRelaxNGValidErrorPop(ctxt);
+                }
+                break;
+            }
+
+            ret = xmlRelaxNGElementMatch(ctxt, define, node);
+            if (ret <= 0) {
+                ret = -1;
+                if ((ctxt->flags & FLAGS_IGNORABLE) == 0)
+                    xmlRelaxNGDumpValidError(ctxt);
+                break;
+            }
+            ret = 0;
+            if (ctxt->errNr != 0) {
+                if (ctxt->errNr > errNr)
+                    xmlRelaxNGPopErrors(ctxt, errNr);
+                while ((ctxt->err != NULL) &&
+                       (((ctxt->err->err == XML_RELAXNG_ERR_ELEMNAME) &&
+                         (xmlStrEqual(ctxt->err->arg2, node->name))) ||
+                        ((ctxt->err->err == XML_RELAXNG_ERR_ELEMEXTRANS) &&
+                         (xmlStrEqual(ctxt->err->arg1, node->name))) ||
+                        (ctxt->err->err == XML_RELAXNG_ERR_NOELEM) ||
+                        (ctxt->err->err == XML_RELAXNG_ERR_NOTELEM)))
+                    xmlRelaxNGValidErrorPop(ctxt);
+            }
+            errNr = ctxt->errNr;
+
+            oldflags = ctxt->flags;
+            if (ctxt->flags & FLAGS_MIXED_CONTENT) {
+                ctxt->flags -= FLAGS_MIXED_CONTENT;
+            }
+            state = xmlRelaxNGNewValidState(ctxt, node);
+            if (state == NULL) {
+                ret = -1;
+                if ((ctxt->flags & FLAGS_IGNORABLE) == 0)
+                    xmlRelaxNGDumpValidError(ctxt);
+                break;
+            }
+
+            oldstate = ctxt->state;
+            ctxt->state = state;
+            if (define->attrs != NULL) {
+                tmp = xmlRelaxNGValidateAttributeList(ctxt, define->attrs);
+                if (tmp != 0) {
+                    ret = -1;
+                    VALID_ERR2(XML_RELAXNG_ERR_ATTRVALID, node->name);
+                }
+            }
+            if (define->contModel != NULL) {
+                xmlRelaxNGValidStatePtr nstate, tmpstate = ctxt->state;
+                xmlRelaxNGStatesPtr tmpstates = ctxt->states;
+                xmlNodePtr nseq;
+
+                nstate = xmlRelaxNGNewValidState(ctxt, node);
+                ctxt->state = nstate;
+                ctxt->states = NULL;
+
+                tmp = xmlRelaxNGValidateCompiledContent(ctxt,
+                                                        define->contModel,
+                                                        ctxt->state->seq);
+                nseq = ctxt->state->seq;
+                ctxt->state = tmpstate;
+                ctxt->states = tmpstates;
+                xmlRelaxNGFreeValidState(ctxt, nstate);
+
+#ifdef DEBUG_COMPILE
+                xmlGenericError(xmlGenericErrorContext,
+                                "Validating content of '%s' : %d\n",
+                                define->name, tmp);
+#endif
+                if (tmp != 0)
+                    ret = -1;
+
+                if (ctxt->states != NULL) {
+                    tmp = -1;
+
+                    for (i = 0; i < ctxt->states->nbState; i++) {
+                        state = ctxt->states->tabState[i];
+                        ctxt->state = state;
+                        ctxt->state->seq = nseq;
+
+                        if (xmlRelaxNGValidateElementEnd(ctxt, 0) == 0) {
+                            tmp = 0;
+                            break;
+                        }
+                    }
+                    if (tmp != 0) {
+                        /*
+                         * validation error, log the message for the "best" one
+                         */
+                        ctxt->flags |= FLAGS_IGNORABLE;
+                        xmlRelaxNGLogBestError(ctxt);
+                    }
+                    for (i = 0; i < ctxt->states->nbState; i++) {
+                        xmlRelaxNGFreeValidState(ctxt,
+                                                 ctxt->states->
+                                                 tabState[i]);
+                    }
+                    xmlRelaxNGFreeStates(ctxt, ctxt->states);
+                    ctxt->flags = oldflags;
+                    ctxt->states = NULL;
+                    if ((ret == 0) && (tmp == -1))
+                        ret = -1;
+                } else {
+                    state = ctxt->state;
+		    if (ctxt->state != NULL)
+			ctxt->state->seq = nseq;
+                    if (ret == 0)
+                        ret = xmlRelaxNGValidateElementEnd(ctxt, 1);
+                    xmlRelaxNGFreeValidState(ctxt, state);
+                }
+            } else {
+                if (define->content != NULL) {
+                    tmp = xmlRelaxNGValidateDefinitionList(ctxt,
+                                                           define->
+                                                           content);
+                    if (tmp != 0) {
+                        ret = -1;
+                        if (ctxt->state == NULL) {
+                            ctxt->state = oldstate;
+                            VALID_ERR2(XML_RELAXNG_ERR_CONTENTVALID,
+                                       node->name);
+                            ctxt->state = NULL;
+                        } else {
+                            VALID_ERR2(XML_RELAXNG_ERR_CONTENTVALID,
+                                       node->name);
+                        }
+
+                    }
+                }
+                if (ctxt->states != NULL) {
+                    tmp = -1;
+
+                    for (i = 0; i < ctxt->states->nbState; i++) {
+                        state = ctxt->states->tabState[i];
+                        ctxt->state = state;
+
+                        if (xmlRelaxNGValidateElementEnd(ctxt, 0) == 0) {
+                            tmp = 0;
+                            break;
+                        }
+                    }
+                    if (tmp != 0) {
+                        /*
+                         * validation error, log the message for the "best" one
+                         */
+                        ctxt->flags |= FLAGS_IGNORABLE;
+                        xmlRelaxNGLogBestError(ctxt);
+                    }
+                    for (i = 0; i < ctxt->states->nbState; i++) {
+                        xmlRelaxNGFreeValidState(ctxt,
+                                                 ctxt->states->tabState[i]);
+                        ctxt->states->tabState[i] = NULL;
+                    }
+                    xmlRelaxNGFreeStates(ctxt, ctxt->states);
+                    ctxt->flags = oldflags;
+                    ctxt->states = NULL;
+                    if ((ret == 0) && (tmp == -1))
+                        ret = -1;
+                } else {
+                    state = ctxt->state;
+                    if (ret == 0)
+                        ret = xmlRelaxNGValidateElementEnd(ctxt, 1);
+                    xmlRelaxNGFreeValidState(ctxt, state);
+                }
+            }
+            if (ret == 0) {
+                node->psvi = define;
+            }
+            ctxt->flags = oldflags;
+            ctxt->state = oldstate;
+            if (oldstate != NULL)
+                oldstate->seq = xmlRelaxNGSkipIgnored(ctxt, node->next);
+            if (ret != 0) {
+                if ((ctxt->flags & FLAGS_IGNORABLE) == 0) {
+                    xmlRelaxNGDumpValidError(ctxt);
+                    ret = 0;
+#if 0
+                } else {
+                    ret = -2;
+#endif
+                }
+            } else {
+                if (ctxt->errNr > errNr)
+                    xmlRelaxNGPopErrors(ctxt, errNr);
+            }
+
+#ifdef DEBUG
+            xmlGenericError(xmlGenericErrorContext,
+                            "xmlRelaxNGValidateDefinition(): validated %s : %d",
+                            node->name, ret);
+            if (oldstate == NULL)
+                xmlGenericError(xmlGenericErrorContext, ": no state\n");
+            else if (oldstate->seq == NULL)
+                xmlGenericError(xmlGenericErrorContext, ": done\n");
+            else if (oldstate->seq->type == XML_ELEMENT_NODE)
+                xmlGenericError(xmlGenericErrorContext, ": next elem %s\n",
+                                oldstate->seq->name);
+            else
+                xmlGenericError(xmlGenericErrorContext, ": next %s %d\n",
+                                oldstate->seq->name, oldstate->seq->type);
+#endif
+            break;
+        case XML_RELAXNG_OPTIONAL:{
+                errNr = ctxt->errNr;
+                oldflags = ctxt->flags;
+                ctxt->flags |= FLAGS_IGNORABLE;
+                oldstate = xmlRelaxNGCopyValidState(ctxt, ctxt->state);
+                ret =
+                    xmlRelaxNGValidateDefinitionList(ctxt,
+                                                     define->content);
+                if (ret != 0) {
+                    if (ctxt->state != NULL)
+                        xmlRelaxNGFreeValidState(ctxt, ctxt->state);
+                    ctxt->state = oldstate;
+                    ctxt->flags = oldflags;
+                    ret = 0;
+                    if (ctxt->errNr > errNr)
+                        xmlRelaxNGPopErrors(ctxt, errNr);
+                    break;
+                }
+                if (ctxt->states != NULL) {
+                    xmlRelaxNGAddStates(ctxt, ctxt->states, oldstate);
+                } else {
+                    ctxt->states = xmlRelaxNGNewStates(ctxt, 1);
+                    if (ctxt->states == NULL) {
+                        xmlRelaxNGFreeValidState(ctxt, oldstate);
+                        ctxt->flags = oldflags;
+                        ret = -1;
+                        if (ctxt->errNr > errNr)
+                            xmlRelaxNGPopErrors(ctxt, errNr);
+                        break;
+                    }
+                    xmlRelaxNGAddStates(ctxt, ctxt->states, oldstate);
+                    xmlRelaxNGAddStates(ctxt, ctxt->states, ctxt->state);
+                    ctxt->state = NULL;
+                }
+                ctxt->flags = oldflags;
+                ret = 0;
+                if (ctxt->errNr > errNr)
+                    xmlRelaxNGPopErrors(ctxt, errNr);
+                break;
+            }
+        case XML_RELAXNG_ONEORMORE:
+            errNr = ctxt->errNr;
+            ret = xmlRelaxNGValidateDefinitionList(ctxt, define->content);
+            if (ret != 0) {
+                break;
+            }
+            if (ctxt->errNr > errNr)
+                xmlRelaxNGPopErrors(ctxt, errNr);
+            /* no break on purpose */
+        case XML_RELAXNG_ZEROORMORE:{
+                int progress;
+                xmlRelaxNGStatesPtr states = NULL, res = NULL;
+                int base, j;
+
+                errNr = ctxt->errNr;
+                res = xmlRelaxNGNewStates(ctxt, 1);
+                if (res == NULL) {
+                    ret = -1;
+                    break;
+                }
+                /*
+                 * All the input states are also exit states
+                 */
+                if (ctxt->state != NULL) {
+                    xmlRelaxNGAddStates(ctxt, res,
+                                        xmlRelaxNGCopyValidState(ctxt,
+                                                                 ctxt->
+                                                                 state));
+                } else {
+                    for (j = 0; j < ctxt->states->nbState; j++) {
+                        xmlRelaxNGAddStates(ctxt, res,
+                            xmlRelaxNGCopyValidState(ctxt,
+                                            ctxt->states->tabState[j]));
+                    }
+                }
+                oldflags = ctxt->flags;
+                ctxt->flags |= FLAGS_IGNORABLE;
+                do {
+                    progress = 0;
+                    base = res->nbState;
+
+                    if (ctxt->states != NULL) {
+                        states = ctxt->states;
+                        for (i = 0; i < states->nbState; i++) {
+                            ctxt->state = states->tabState[i];
+                            ctxt->states = NULL;
+                            ret = xmlRelaxNGValidateDefinitionList(ctxt,
+                                                                   define->
+                                                                   content);
+                            if (ret == 0) {
+                                if (ctxt->state != NULL) {
+                                    tmp = xmlRelaxNGAddStates(ctxt, res,
+                                                              ctxt->state);
+                                    ctxt->state = NULL;
+                                    if (tmp == 1)
+                                        progress = 1;
+                                } else if (ctxt->states != NULL) {
+                                    for (j = 0; j < ctxt->states->nbState;
+                                         j++) {
+                                        tmp =
+                                            xmlRelaxNGAddStates(ctxt, res,
+                                                   ctxt->states->tabState[j]);
+                                        if (tmp == 1)
+                                            progress = 1;
+                                    }
+                                    xmlRelaxNGFreeStates(ctxt,
+                                                         ctxt->states);
+                                    ctxt->states = NULL;
+                                }
+                            } else {
+                                if (ctxt->state != NULL) {
+                                    xmlRelaxNGFreeValidState(ctxt,
+                                                             ctxt->state);
+                                    ctxt->state = NULL;
+                                }
+                            }
+                        }
+                    } else {
+                        ret = xmlRelaxNGValidateDefinitionList(ctxt,
+                                                               define->
+                                                               content);
+                        if (ret != 0) {
+                            xmlRelaxNGFreeValidState(ctxt, ctxt->state);
+                            ctxt->state = NULL;
+                        } else {
+                            base = res->nbState;
+                            if (ctxt->state != NULL) {
+                                tmp = xmlRelaxNGAddStates(ctxt, res,
+                                                          ctxt->state);
+                                ctxt->state = NULL;
+                                if (tmp == 1)
+                                    progress = 1;
+                            } else if (ctxt->states != NULL) {
+                                for (j = 0; j < ctxt->states->nbState; j++) {
+                                    tmp = xmlRelaxNGAddStates(ctxt, res,
+                                               ctxt->states->tabState[j]);
+                                    if (tmp == 1)
+                                        progress = 1;
+                                }
+                                if (states == NULL) {
+                                    states = ctxt->states;
+                                } else {
+                                    xmlRelaxNGFreeStates(ctxt,
+                                                         ctxt->states);
+                                }
+                                ctxt->states = NULL;
+                            }
+                        }
+                    }
+                    if (progress) {
+                        /*
+                         * Collect all the new nodes added at that step
+                         * and make them the new node set
+                         */
+                        if (res->nbState - base == 1) {
+                            ctxt->state = xmlRelaxNGCopyValidState(ctxt,
+                                                                   res->
+                                                                   tabState
+                                                                   [base]);
+                        } else {
+                            if (states == NULL) {
+                                xmlRelaxNGNewStates(ctxt,
+                                                    res->nbState - base);
+			        states = ctxt->states;
+				if (states == NULL) {
+				    progress = 0;
+				    break;
+				}
+                            }
+                            states->nbState = 0;
+                            for (i = base; i < res->nbState; i++)
+                                xmlRelaxNGAddStates(ctxt, states,
+                                                    xmlRelaxNGCopyValidState
+                                                    (ctxt, res->tabState[i]));
+                            ctxt->states = states;
+                        }
+                    }
+                } while (progress == 1);
+                if (states != NULL) {
+                    xmlRelaxNGFreeStates(ctxt, states);
+                }
+                ctxt->states = res;
+                ctxt->flags = oldflags;
+#if 0
+                /*
+                 * errors may have to be propagated back...
+                 */
+                if (ctxt->errNr > errNr)
+                    xmlRelaxNGPopErrors(ctxt, errNr);
+#endif
+                ret = 0;
+                break;
+            }
+        case XML_RELAXNG_CHOICE:{
+                xmlRelaxNGDefinePtr list = NULL;
+                xmlRelaxNGStatesPtr states = NULL;
+
+                node = xmlRelaxNGSkipIgnored(ctxt, node);
+
+                errNr = ctxt->errNr;
+                if ((define->dflags & IS_TRIABLE) && (define->data != NULL) &&
+		    (node != NULL)) {
+		    /*
+		     * node == NULL can't be optimized since IS_TRIABLE
+		     * doesn't account for choice which may lead to
+		     * only attributes.
+		     */
+                    xmlHashTablePtr triage =
+                        (xmlHashTablePtr) define->data;
+
+                    /*
+                     * Something we can optimize cleanly there is only one
+                     * possble branch out !
+                     */
+                    if ((node->type == XML_TEXT_NODE) ||
+                        (node->type == XML_CDATA_SECTION_NODE)) {
+                        list =
+                            xmlHashLookup2(triage, BAD_CAST "#text", NULL);
+                    } else if (node->type == XML_ELEMENT_NODE) {
+                        if (node->ns != NULL) {
+                            list = xmlHashLookup2(triage, node->name,
+                                                  node->ns->href);
+                            if (list == NULL)
+                                list =
+                                    xmlHashLookup2(triage, BAD_CAST "#any",
+                                                   node->ns->href);
+                        } else
+                            list =
+                                xmlHashLookup2(triage, node->name, NULL);
+                        if (list == NULL)
+                            list =
+                                xmlHashLookup2(triage, BAD_CAST "#any",
+                                               NULL);
+                    }
+                    if (list == NULL) {
+                        ret = -1;
+			VALID_ERR2(XML_RELAXNG_ERR_ELEMWRONG, node->name);
+                        break;
+                    }
+                    ret = xmlRelaxNGValidateDefinition(ctxt, list);
+                    if (ret == 0) {
+                    }
+                    break;
+                }
+
+                list = define->content;
+                oldflags = ctxt->flags;
+                ctxt->flags |= FLAGS_IGNORABLE;
+
+                while (list != NULL) {
+                    oldstate = xmlRelaxNGCopyValidState(ctxt, ctxt->state);
+                    ret = xmlRelaxNGValidateDefinition(ctxt, list);
+                    if (ret == 0) {
+                        if (states == NULL) {
+                            states = xmlRelaxNGNewStates(ctxt, 1);
+                        }
+                        if (ctxt->state != NULL) {
+                            xmlRelaxNGAddStates(ctxt, states, ctxt->state);
+                        } else if (ctxt->states != NULL) {
+                            for (i = 0; i < ctxt->states->nbState; i++) {
+                                xmlRelaxNGAddStates(ctxt, states,
+                                                    ctxt->states->
+                                                    tabState[i]);
+                            }
+                            xmlRelaxNGFreeStates(ctxt, ctxt->states);
+                            ctxt->states = NULL;
+                        }
+                    } else {
+                        xmlRelaxNGFreeValidState(ctxt, ctxt->state);
+                    }
+                    ctxt->state = oldstate;
+                    list = list->next;
+                }
+                if (states != NULL) {
+                    xmlRelaxNGFreeValidState(ctxt, oldstate);
+                    ctxt->states = states;
+                    ctxt->state = NULL;
+                    ret = 0;
+                } else {
+                    ctxt->states = NULL;
+                }
+                ctxt->flags = oldflags;
+                if (ret != 0) {
+                    if ((ctxt->flags & FLAGS_IGNORABLE) == 0) {
+                        xmlRelaxNGDumpValidError(ctxt);
+                    }
+                } else {
+                    if (ctxt->errNr > errNr)
+                        xmlRelaxNGPopErrors(ctxt, errNr);
+                }
+                break;
+            }
+        case XML_RELAXNG_DEF:
+        case XML_RELAXNG_GROUP:
+            ret = xmlRelaxNGValidateDefinitionList(ctxt, define->content);
+            break;
+        case XML_RELAXNG_INTERLEAVE:
+            ret = xmlRelaxNGValidateInterleave(ctxt, define);
+            break;
+        case XML_RELAXNG_ATTRIBUTE:
+            ret = xmlRelaxNGValidateAttribute(ctxt, define);
+            break;
+        case XML_RELAXNG_START:
+        case XML_RELAXNG_NOOP:
+        case XML_RELAXNG_REF:
+        case XML_RELAXNG_EXTERNALREF:
+        case XML_RELAXNG_PARENTREF:
+            ret = xmlRelaxNGValidateDefinition(ctxt, define->content);
+            break;
+        case XML_RELAXNG_DATATYPE:{
+                xmlNodePtr child;
+                xmlChar *content = NULL;
+
+                child = node;
+                while (child != NULL) {
+                    if (child->type == XML_ELEMENT_NODE) {
+                        VALID_ERR2(XML_RELAXNG_ERR_DATAELEM,
+                                   node->parent->name);
+                        ret = -1;
+                        break;
+                    } else if ((child->type == XML_TEXT_NODE) ||
+                               (child->type == XML_CDATA_SECTION_NODE)) {
+                        content = xmlStrcat(content, child->content);
+                    }
+                    /* TODO: handle entities ... */
+                    child = child->next;
+                }
+                if (ret == -1) {
+                    if (content != NULL)
+                        xmlFree(content);
+                    break;
+                }
+                if (content == NULL) {
+                    content = xmlStrdup(BAD_CAST "");
+                    if (content == NULL) {
+                        xmlRngVErrMemory(ctxt, "validating\n");
+                        ret = -1;
+                        break;
+                    }
+                }
+                ret = xmlRelaxNGValidateDatatype(ctxt, content, define,
+                                                 ctxt->state->seq);
+                if (ret == -1) {
+                    VALID_ERR2(XML_RELAXNG_ERR_DATATYPE, define->name);
+                } else if (ret == 0) {
+                    ctxt->state->seq = NULL;
+                }
+                if (content != NULL)
+                    xmlFree(content);
+                break;
+            }
+        case XML_RELAXNG_VALUE:{
+                xmlChar *content = NULL;
+                xmlChar *oldvalue;
+                xmlNodePtr child;
+
+                child = node;
+                while (child != NULL) {
+                    if (child->type == XML_ELEMENT_NODE) {
+                        VALID_ERR2(XML_RELAXNG_ERR_VALELEM,
+                                   node->parent->name);
+                        ret = -1;
+                        break;
+                    } else if ((child->type == XML_TEXT_NODE) ||
+                               (child->type == XML_CDATA_SECTION_NODE)) {
+                        content = xmlStrcat(content, child->content);
+                    }
+                    /* TODO: handle entities ... */
+                    child = child->next;
+                }
+                if (ret == -1) {
+                    if (content != NULL)
+                        xmlFree(content);
+                    break;
+                }
+                if (content == NULL) {
+                    content = xmlStrdup(BAD_CAST "");
+                    if (content == NULL) {
+                        xmlRngVErrMemory(ctxt, "validating\n");
+                        ret = -1;
+                        break;
+                    }
+                }
+                oldvalue = ctxt->state->value;
+                ctxt->state->value = content;
+                ret = xmlRelaxNGValidateValue(ctxt, define);
+                ctxt->state->value = oldvalue;
+                if (ret == -1) {
+                    VALID_ERR2(XML_RELAXNG_ERR_VALUE, define->name);
+                } else if (ret == 0) {
+                    ctxt->state->seq = NULL;
+                }
+                if (content != NULL)
+                    xmlFree(content);
+                break;
+            }
+        case XML_RELAXNG_LIST:{
+                xmlChar *content;
+                xmlNodePtr child;
+                xmlChar *oldvalue, *oldendvalue;
+                int len;
+
+                /*
+                 * Make sure it's only text nodes
+                 */
+
+                content = NULL;
+                child = node;
+                while (child != NULL) {
+                    if (child->type == XML_ELEMENT_NODE) {
+                        VALID_ERR2(XML_RELAXNG_ERR_LISTELEM,
+                                   node->parent->name);
+                        ret = -1;
+                        break;
+                    } else if ((child->type == XML_TEXT_NODE) ||
+                               (child->type == XML_CDATA_SECTION_NODE)) {
+                        content = xmlStrcat(content, child->content);
+                    }
+                    /* TODO: handle entities ... */
+                    child = child->next;
+                }
+                if (ret == -1) {
+                    if (content != NULL)
+                        xmlFree(content);
+                    break;
+                }
+                if (content == NULL) {
+                    content = xmlStrdup(BAD_CAST "");
+                    if (content == NULL) {
+                        xmlRngVErrMemory(ctxt, "validating\n");
+                        ret = -1;
+                        break;
+                    }
+                }
+                len = xmlStrlen(content);
+                oldvalue = ctxt->state->value;
+                oldendvalue = ctxt->state->endvalue;
+                ctxt->state->value = content;
+                ctxt->state->endvalue = content + len;
+                ret = xmlRelaxNGValidateValue(ctxt, define);
+                ctxt->state->value = oldvalue;
+                ctxt->state->endvalue = oldendvalue;
+                if (ret == -1) {
+                    VALID_ERR(XML_RELAXNG_ERR_LIST);
+                } else if ((ret == 0) && (node != NULL)) {
+                    ctxt->state->seq = node->next;
+                }
+                if (content != NULL)
+                    xmlFree(content);
+                break;
+            }
+        case XML_RELAXNG_EXCEPT:
+        case XML_RELAXNG_PARAM:
+            TODO ret = -1;
+            break;
+    }
+    ctxt->depth--;
+#ifdef DEBUG
+    for (i = 0; i < ctxt->depth; i++)
+        xmlGenericError(xmlGenericErrorContext, " ");
+    xmlGenericError(xmlGenericErrorContext,
+                    "Validating %s ", xmlRelaxNGDefName(define));
+    if (define->name != NULL)
+        xmlGenericError(xmlGenericErrorContext, "%s ", define->name);
+    if (ret == 0)
+        xmlGenericError(xmlGenericErrorContext, "suceeded\n");
+    else
+        xmlGenericError(xmlGenericErrorContext, "failed\n");
+#endif
+    return (ret);
+}
+
+/**
+ * xmlRelaxNGValidateDefinition:
+ * @ctxt:  a Relax-NG validation context
+ * @define:  the definition to verify
+ *
+ * Validate the current node lists against the definition
+ *
+ * Returns 0 if the validation succeeded or an error code.
+ */
+static int
+xmlRelaxNGValidateDefinition(xmlRelaxNGValidCtxtPtr ctxt,
+                             xmlRelaxNGDefinePtr define)
+{
+    xmlRelaxNGStatesPtr states, res;
+    int i, j, k, ret, oldflags;
+
+    /*
+     * We should NOT have both ctxt->state and ctxt->states
+     */
+    if ((ctxt->state != NULL) && (ctxt->states != NULL)) {
+        TODO xmlRelaxNGFreeValidState(ctxt, ctxt->state);
+        ctxt->state = NULL;
+    }
+
+    if ((ctxt->states == NULL) || (ctxt->states->nbState == 1)) {
+        if (ctxt->states != NULL) {
+            ctxt->state = ctxt->states->tabState[0];
+            xmlRelaxNGFreeStates(ctxt, ctxt->states);
+            ctxt->states = NULL;
+        }
+        ret = xmlRelaxNGValidateState(ctxt, define);
+        if ((ctxt->state != NULL) && (ctxt->states != NULL)) {
+            TODO xmlRelaxNGFreeValidState(ctxt, ctxt->state);
+            ctxt->state = NULL;
+        }
+        if ((ctxt->states != NULL) && (ctxt->states->nbState == 1)) {
+            ctxt->state = ctxt->states->tabState[0];
+            xmlRelaxNGFreeStates(ctxt, ctxt->states);
+            ctxt->states = NULL;
+        }
+        return (ret);
+    }
+
+    states = ctxt->states;
+    ctxt->states = NULL;
+    res = NULL;
+    j = 0;
+    oldflags = ctxt->flags;
+    ctxt->flags |= FLAGS_IGNORABLE;
+    for (i = 0; i < states->nbState; i++) {
+        ctxt->state = states->tabState[i];
+        ctxt->states = NULL;
+        ret = xmlRelaxNGValidateState(ctxt, define);
+        /*
+         * We should NOT have both ctxt->state and ctxt->states
+         */
+        if ((ctxt->state != NULL) && (ctxt->states != NULL)) {
+            TODO xmlRelaxNGFreeValidState(ctxt, ctxt->state);
+            ctxt->state = NULL;
+        }
+        if (ret == 0) {
+            if (ctxt->states == NULL) {
+                if (res != NULL) {
+                    /* add the state to the container */
+                    xmlRelaxNGAddStates(ctxt, res, ctxt->state);
+                    ctxt->state = NULL;
+                } else {
+                    /* add the state directly in states */
+                    states->tabState[j++] = ctxt->state;
+                    ctxt->state = NULL;
+                }
+            } else {
+                if (res == NULL) {
+                    /* make it the new container and copy other results */
+                    res = ctxt->states;
+                    ctxt->states = NULL;
+                    for (k = 0; k < j; k++)
+                        xmlRelaxNGAddStates(ctxt, res,
+                                            states->tabState[k]);
+                } else {
+                    /* add all the new results to res and reff the container */
+                    for (k = 0; k < ctxt->states->nbState; k++)
+                        xmlRelaxNGAddStates(ctxt, res,
+                                            ctxt->states->tabState[k]);
+                    xmlRelaxNGFreeStates(ctxt, ctxt->states);
+                    ctxt->states = NULL;
+                }
+            }
+        } else {
+            if (ctxt->state != NULL) {
+                xmlRelaxNGFreeValidState(ctxt, ctxt->state);
+                ctxt->state = NULL;
+            } else if (ctxt->states != NULL) {
+                for (k = 0; k < ctxt->states->nbState; k++)
+                    xmlRelaxNGFreeValidState(ctxt,
+                                             ctxt->states->tabState[k]);
+                xmlRelaxNGFreeStates(ctxt, ctxt->states);
+                ctxt->states = NULL;
+            }
+        }
+    }
+    ctxt->flags = oldflags;
+    if (res != NULL) {
+        xmlRelaxNGFreeStates(ctxt, states);
+        ctxt->states = res;
+        ret = 0;
+    } else if (j > 1) {
+        states->nbState = j;
+        ctxt->states = states;
+        ret = 0;
+    } else if (j == 1) {
+        ctxt->state = states->tabState[0];
+        xmlRelaxNGFreeStates(ctxt, states);
+        ret = 0;
+    } else {
+        ret = -1;
+        xmlRelaxNGFreeStates(ctxt, states);
+        if (ctxt->states != NULL) {
+            xmlRelaxNGFreeStates(ctxt, ctxt->states);
+            ctxt->states = NULL;
+        }
+    }
+    if ((ctxt->state != NULL) && (ctxt->states != NULL)) {
+        TODO xmlRelaxNGFreeValidState(ctxt, ctxt->state);
+        ctxt->state = NULL;
+    }
+    return (ret);
+}
+
+/**
+ * xmlRelaxNGValidateDocument:
+ * @ctxt:  a Relax-NG validation context
+ * @doc:  the document
+ *
+ * Validate the given document
+ *
+ * Returns 0 if the validation succeeded or an error code.
+ */
+static int
+xmlRelaxNGValidateDocument(xmlRelaxNGValidCtxtPtr ctxt, xmlDocPtr doc)
+{
+    int ret;
+    xmlRelaxNGPtr schema;
+    xmlRelaxNGGrammarPtr grammar;
+    xmlRelaxNGValidStatePtr state;
+    xmlNodePtr node;
+
+    if ((ctxt == NULL) || (ctxt->schema == NULL) || (doc == NULL))
+        return (-1);
+
+    ctxt->errNo = XML_RELAXNG_OK;
+    schema = ctxt->schema;
+    grammar = schema->topgrammar;
+    if (grammar == NULL) {
+        VALID_ERR(XML_RELAXNG_ERR_NOGRAMMAR);
+        return (-1);
+    }
+    state = xmlRelaxNGNewValidState(ctxt, NULL);
+    ctxt->state = state;
+    ret = xmlRelaxNGValidateDefinition(ctxt, grammar->start);
+    if ((ctxt->state != NULL) && (state->seq != NULL)) {
+        state = ctxt->state;
+        node = state->seq;
+        node = xmlRelaxNGSkipIgnored(ctxt, node);
+        if (node != NULL) {
+            if (ret != -1) {
+                VALID_ERR(XML_RELAXNG_ERR_EXTRADATA);
+                ret = -1;
+            }
+        }
+    } else if (ctxt->states != NULL) {
+        int i;
+        int tmp = -1;
+
+        for (i = 0; i < ctxt->states->nbState; i++) {
+            state = ctxt->states->tabState[i];
+            node = state->seq;
+            node = xmlRelaxNGSkipIgnored(ctxt, node);
+            if (node == NULL)
+                tmp = 0;
+            xmlRelaxNGFreeValidState(ctxt, state);
+        }
+        if (tmp == -1) {
+            if (ret != -1) {
+                VALID_ERR(XML_RELAXNG_ERR_EXTRADATA);
+                ret = -1;
+            }
+        }
+    }
+    if (ctxt->state != NULL) {
+        xmlRelaxNGFreeValidState(ctxt, ctxt->state);
+        ctxt->state = NULL;
+    }
+    if (ret != 0)
+        xmlRelaxNGDumpValidError(ctxt);
+#ifdef DEBUG
+    else if (ctxt->errNr != 0) {
+        ctxt->error(ctxt->userData,
+                    "%d Extra error messages left on stack !\n",
+                    ctxt->errNr);
+        xmlRelaxNGDumpValidError(ctxt);
+    }
+#endif
+#ifdef LIBXML_VALID_ENABLED
+    if (ctxt->idref == 1) {
+        xmlValidCtxt vctxt;
+
+        memset(&vctxt, 0, sizeof(xmlValidCtxt));
+        vctxt.valid = 1;
+        vctxt.error = ctxt->error;
+        vctxt.warning = ctxt->warning;
+        vctxt.userData = ctxt->userData;
+
+        if (xmlValidateDocumentFinal(&vctxt, doc) != 1)
+            ret = -1;
+    }
+#endif /* LIBXML_VALID_ENABLED */
+    if ((ret == 0) && (ctxt->errNo != XML_RELAXNG_OK))
+        ret = -1;
+
+    return (ret);
+}
+
+/**
+ * xmlRelaxNGCleanPSVI:
+ * @node:  an input element or document
+ *
+ * Call this routine to speed up XPath computation on static documents.
+ * This stamps all the element nodes with the document order
+ * Like for line information, the order is kept in the element->content
+ * field, the value stored is actually - the node number (starting at -1)
+ * to be able to differentiate from line numbers.
+ *
+ * Returns the number of elements found in the document or -1 in case
+ *    of error.
+ */
+static void
+xmlRelaxNGCleanPSVI(xmlNodePtr node) {
+    xmlNodePtr cur;
+
+    if ((node == NULL) ||
+        ((node->type != XML_ELEMENT_NODE) &&
+         (node->type != XML_DOCUMENT_NODE) &&
+         (node->type != XML_HTML_DOCUMENT_NODE)))
+	return;
+    if (node->type == XML_ELEMENT_NODE)
+        node->psvi = NULL;
+
+    cur = node->children;
+    while (cur != NULL) {
+	if (cur->type == XML_ELEMENT_NODE) {
+	    cur->psvi = NULL;
+	    if (cur->children != NULL) {
+		cur = cur->children;
+		continue;
+	    }
+	}
+	if (cur->next != NULL) {
+	    cur = cur->next;
+	    continue;
+	}
+	do {
+	    cur = cur->parent;
+	    if (cur == NULL)
+		break;
+	    if (cur == node) {
+		cur = NULL;
+		break;
+	    }
+	    if (cur->next != NULL) {
+		cur = cur->next;
+		break;
+	    }
+	} while (cur != NULL);
+    }
+    return;
+}
+/************************************************************************
+ *									*
+ *			Validation interfaces				*
+ *									*
+ ************************************************************************/
+
+/**
+ * xmlRelaxNGNewValidCtxt:
+ * @schema:  a precompiled XML RelaxNGs
+ *
+ * Create an XML RelaxNGs validation context based on the given schema
+ *
+ * Returns the validation context or NULL in case of error
+ */
+xmlRelaxNGValidCtxtPtr
+xmlRelaxNGNewValidCtxt(xmlRelaxNGPtr schema)
+{
+    xmlRelaxNGValidCtxtPtr ret;
+
+    ret = (xmlRelaxNGValidCtxtPtr) xmlMalloc(sizeof(xmlRelaxNGValidCtxt));
+    if (ret == NULL) {
+        xmlRngVErrMemory(NULL, "building context\n");
+        return (NULL);
+    }
+    memset(ret, 0, sizeof(xmlRelaxNGValidCtxt));
+    ret->schema = schema;
+    ret->error = xmlGenericError;
+    ret->userData = xmlGenericErrorContext;
+    ret->errNr = 0;
+    ret->errMax = 0;
+    ret->err = NULL;
+    ret->errTab = NULL;
+    if (schema != NULL)
+	ret->idref = schema->idref;
+    ret->states = NULL;
+    ret->freeState = NULL;
+    ret->freeStates = NULL;
+    ret->errNo = XML_RELAXNG_OK;
+    return (ret);
+}
+
+/**
+ * xmlRelaxNGFreeValidCtxt:
+ * @ctxt:  the schema validation context
+ *
+ * Free the resources associated to the schema validation context
+ */
+void
+xmlRelaxNGFreeValidCtxt(xmlRelaxNGValidCtxtPtr ctxt)
+{
+    int k;
+
+    if (ctxt == NULL)
+        return;
+    if (ctxt->states != NULL)
+        xmlRelaxNGFreeStates(NULL, ctxt->states);
+    if (ctxt->freeState != NULL) {
+        for (k = 0; k < ctxt->freeState->nbState; k++) {
+            xmlRelaxNGFreeValidState(NULL, ctxt->freeState->tabState[k]);
+        }
+        xmlRelaxNGFreeStates(NULL, ctxt->freeState);
+    }
+    if (ctxt->freeStates != NULL) {
+        for (k = 0; k < ctxt->freeStatesNr; k++) {
+            xmlRelaxNGFreeStates(NULL, ctxt->freeStates[k]);
+        }
+        xmlFree(ctxt->freeStates);
+    }
+    if (ctxt->errTab != NULL)
+        xmlFree(ctxt->errTab);
+    if (ctxt->elemTab != NULL) {
+        xmlRegExecCtxtPtr exec;
+
+        exec = xmlRelaxNGElemPop(ctxt);
+        while (exec != NULL) {
+            xmlRegFreeExecCtxt(exec);
+            exec = xmlRelaxNGElemPop(ctxt);
+        }
+        xmlFree(ctxt->elemTab);
+    }
+    xmlFree(ctxt);
+}
+
+/**
+ * xmlRelaxNGSetValidErrors:
+ * @ctxt:  a Relax-NG validation context
+ * @err:  the error function
+ * @warn: the warning function
+ * @ctx: the functions context
+ *
+ * Set the error and warning callback informations
+ */
+void
+xmlRelaxNGSetValidErrors(xmlRelaxNGValidCtxtPtr ctxt,
+                         xmlRelaxNGValidityErrorFunc err,
+                         xmlRelaxNGValidityWarningFunc warn, void *ctx)
+{
+    if (ctxt == NULL)
+        return;
+    ctxt->error = err;
+    ctxt->warning = warn;
+    ctxt->userData = ctx;
+    ctxt->serror = NULL;
+}
+
+/**
+ * xmlRelaxNGSetValidStructuredErrors:
+ * @ctxt:  a Relax-NG validation context
+ * @serror:  the structured error function
+ * @ctx: the functions context
+ *
+ * Set the structured error callback
+ */
+void
+xmlRelaxNGSetValidStructuredErrors(xmlRelaxNGValidCtxtPtr ctxt,
+                                   xmlStructuredErrorFunc serror, void *ctx)
+{
+    if (ctxt == NULL)
+        return;
+    ctxt->serror = serror;
+    ctxt->error = NULL;
+    ctxt->warning = NULL;
+    ctxt->userData = ctx;
+}
+
+/**
+ * xmlRelaxNGGetValidErrors:
+ * @ctxt:  a Relax-NG validation context
+ * @err:  the error function result
+ * @warn: the warning function result
+ * @ctx: the functions context result
+ *
+ * Get the error and warning callback informations
+ *
+ * Returns -1 in case of error and 0 otherwise
+ */
+int
+xmlRelaxNGGetValidErrors(xmlRelaxNGValidCtxtPtr ctxt,
+                         xmlRelaxNGValidityErrorFunc * err,
+                         xmlRelaxNGValidityWarningFunc * warn, void **ctx)
+{
+    if (ctxt == NULL)
+        return (-1);
+    if (err != NULL)
+        *err = ctxt->error;
+    if (warn != NULL)
+        *warn = ctxt->warning;
+    if (ctx != NULL)
+        *ctx = ctxt->userData;
+    return (0);
+}
+
+/**
+ * xmlRelaxNGValidateDoc:
+ * @ctxt:  a Relax-NG validation context
+ * @doc:  a parsed document tree
+ *
+ * Validate a document tree in memory.
+ *
+ * Returns 0 if the document is valid, a positive error code
+ *     number otherwise and -1 in case of internal or API error.
+ */
+int
+xmlRelaxNGValidateDoc(xmlRelaxNGValidCtxtPtr ctxt, xmlDocPtr doc)
+{
+    int ret;
+
+    if ((ctxt == NULL) || (doc == NULL))
+        return (-1);
+
+    ctxt->doc = doc;
+
+    ret = xmlRelaxNGValidateDocument(ctxt, doc);
+    /*
+     * Remove all left PSVI
+     */
+    xmlRelaxNGCleanPSVI((xmlNodePtr) doc);
+
+    /*
+     * TODO: build error codes
+     */
+    if (ret == -1)
+        return (1);
+    return (ret);
+}
+
+#define bottom_relaxng
+#include "elfgcchack.h"
+#endif /* LIBXML_SCHEMAS_ENABLED */