move the xml package implementation to xmlcore, and adjust the tests to

test that package, not the xmlcore/PyXML switcheroo fiasco in the xml
module/package

1 files changed, 0 insertions, 1938 deletions

diff --git a/Lib/xml/dom/minidom.py b/Lib/xml/dom/minidom.py
deleted file mode 100644
index 84be99b..0000000
--- a/Lib/xml/dom/minidom.py
+++ /dev/null
@@ -1,1938 +0,0 @@
-"""\
-minidom.py -- a lightweight DOM implementation.
-
-parse("foo.xml")
-
-parseString("<foo><bar/></foo>")
-
-Todo:
-=====
- * convenience methods for getting elements and text.
- * more testing
- * bring some of the writer and linearizer code into conformance with this
-        interface
- * SAX 2 namespaces
-"""
-
-import xml.dom
-
-from xml.dom import EMPTY_NAMESPACE, EMPTY_PREFIX, XMLNS_NAMESPACE, domreg
-from xml.dom.minicompat import *
-from xml.dom.xmlbuilder import DOMImplementationLS, DocumentLS
-
-_TupleType = type(())
-
-# This is used by the ID-cache invalidation checks; the list isn't
-# actually complete, since the nodes being checked will never be the
-# DOCUMENT_NODE or DOCUMENT_FRAGMENT_NODE.  (The node being checked is
-# the node being added or removed, not the node being modified.)
-#
-_nodeTypes_with_children = (xml.dom.Node.ELEMENT_NODE,
-                            xml.dom.Node.ENTITY_REFERENCE_NODE)
-
-
-class Node(xml.dom.Node, GetattrMagic):
-    namespaceURI = None # this is non-null only for elements and attributes
-    parentNode = None
-    ownerDocument = None
-    nextSibling = None
-    previousSibling = None
-
-    prefix = EMPTY_PREFIX # non-null only for NS elements and attributes
-
-    def __nonzero__(self):
-        return True
-
-    def toxml(self, encoding = None):
-        return self.toprettyxml("", "", encoding)
-
-    def toprettyxml(self, indent="\t", newl="\n", encoding = None):
-        # indent = the indentation string to prepend, per level
-        # newl = the newline string to append
-        writer = _get_StringIO()
-        if encoding is not None:
-            import codecs
-            # Can't use codecs.getwriter to preserve 2.0 compatibility
-            writer = codecs.lookup(encoding)[3](writer)
-        if self.nodeType == Node.DOCUMENT_NODE:
-            # Can pass encoding only to document, to put it into XML header
-            self.writexml(writer, "", indent, newl, encoding)
-        else:
-            self.writexml(writer, "", indent, newl)
-        return writer.getvalue()
-
-    def hasChildNodes(self):
-        if self.childNodes:
-            return True
-        else:
-            return False
-
-    def _get_childNodes(self):
-        return self.childNodes
-
-    def _get_firstChild(self):
-        if self.childNodes:
-            return self.childNodes[0]
-
-    def _get_lastChild(self):
-        if self.childNodes:
-            return self.childNodes[-1]
-
-    def insertBefore(self, newChild, refChild):
-        if newChild.nodeType == self.DOCUMENT_FRAGMENT_NODE:
-            for c in tuple(newChild.childNodes):
-                self.insertBefore(c, refChild)
-            ### The DOM does not clearly specify what to return in this case
-            return newChild
-        if newChild.nodeType not in self._child_node_types:
-            raise xml.dom.HierarchyRequestErr(
-                "%s cannot be child of %s" % (repr(newChild), repr(self)))
-        if newChild.parentNode is not None:
-            newChild.parentNode.removeChild(newChild)
-        if refChild is None:
-            self.appendChild(newChild)
-        else:
-            try:
-                index = self.childNodes.index(refChild)
-            except ValueError:
-                raise xml.dom.NotFoundErr()
-            if newChild.nodeType in _nodeTypes_with_children:
-                _clear_id_cache(self)
-            self.childNodes.insert(index, newChild)
-            newChild.nextSibling = refChild
-            refChild.previousSibling = newChild
-            if index:
-                node = self.childNodes[index-1]
-                node.nextSibling = newChild
-                newChild.previousSibling = node
-            else:
-                newChild.previousSibling = None
-            newChild.parentNode = self
-        return newChild
-
-    def appendChild(self, node):
-        if node.nodeType == self.DOCUMENT_FRAGMENT_NODE:
-            for c in tuple(node.childNodes):
-                self.appendChild(c)
-            ### The DOM does not clearly specify what to return in this case
-            return node
-        if node.nodeType not in self._child_node_types:
-            raise xml.dom.HierarchyRequestErr(
-                "%s cannot be child of %s" % (repr(node), repr(self)))
-        elif node.nodeType in _nodeTypes_with_children:
-            _clear_id_cache(self)
-        if node.parentNode is not None:
-            node.parentNode.removeChild(node)
-        _append_child(self, node)
-        node.nextSibling = None
-        return node
-
-    def replaceChild(self, newChild, oldChild):
-        if newChild.nodeType == self.DOCUMENT_FRAGMENT_NODE:
-            refChild = oldChild.nextSibling
-            self.removeChild(oldChild)
-            return self.insertBefore(newChild, refChild)
-        if newChild.nodeType not in self._child_node_types:
-            raise xml.dom.HierarchyRequestErr(
-                "%s cannot be child of %s" % (repr(newChild), repr(self)))
-        if newChild is oldChild:
-            return
-        if newChild.parentNode is not None:
-            newChild.parentNode.removeChild(newChild)
-        try:
-            index = self.childNodes.index(oldChild)
-        except ValueError:
-            raise xml.dom.NotFoundErr()
-        self.childNodes[index] = newChild
-        newChild.parentNode = self
-        oldChild.parentNode = None
-        if (newChild.nodeType in _nodeTypes_with_children
-            or oldChild.nodeType in _nodeTypes_with_children):
-            _clear_id_cache(self)
-        newChild.nextSibling = oldChild.nextSibling
-        newChild.previousSibling = oldChild.previousSibling
-        oldChild.nextSibling = None
-        oldChild.previousSibling = None
-        if newChild.previousSibling:
-            newChild.previousSibling.nextSibling = newChild
-        if newChild.nextSibling:
-            newChild.nextSibling.previousSibling = newChild
-        return oldChild
-
-    def removeChild(self, oldChild):
-        try:
-            self.childNodes.remove(oldChild)
-        except ValueError:
-            raise xml.dom.NotFoundErr()
-        if oldChild.nextSibling is not None:
-            oldChild.nextSibling.previousSibling = oldChild.previousSibling
-        if oldChild.previousSibling is not None:
-            oldChild.previousSibling.nextSibling = oldChild.nextSibling
-        oldChild.nextSibling = oldChild.previousSibling = None
-        if oldChild.nodeType in _nodeTypes_with_children:
-            _clear_id_cache(self)
-
-        oldChild.parentNode = None
-        return oldChild
-
-    def normalize(self):
-        L = []
-        for child in self.childNodes:
-            if child.nodeType == Node.TEXT_NODE:
-                data = child.data
-                if data and L and L[-1].nodeType == child.nodeType:
-                    # collapse text node
-                    node = L[-1]
-                    node.data = node.data + child.data
-                    node.nextSibling = child.nextSibling
-                    child.unlink()
-                elif data:
-                    if L:
-                        L[-1].nextSibling = child
-                        child.previousSibling = L[-1]
-                    else:
-                        child.previousSibling = None
-                    L.append(child)
-                else:
-                    # empty text node; discard
-                    child.unlink()
-            else:
-                if L:
-                    L[-1].nextSibling = child
-                    child.previousSibling = L[-1]
-                else:
-                    child.previousSibling = None
-                L.append(child)
-                if child.nodeType == Node.ELEMENT_NODE:
-                    child.normalize()
-        self.childNodes[:] = L
-
-    def cloneNode(self, deep):
-        return _clone_node(self, deep, self.ownerDocument or self)
-
-    def isSupported(self, feature, version):
-        return self.ownerDocument.implementation.hasFeature(feature, version)
-
-    def _get_localName(self):
-        # Overridden in Element and Attr where localName can be Non-Null
-        return None
-
-    # Node interfaces from Level 3 (WD 9 April 2002)
-
-    def isSameNode(self, other):
-        return self is other
-
-    def getInterface(self, feature):
-        if self.isSupported(feature, None):
-            return self
-        else:
-            return None
-
-    # The "user data" functions use a dictionary that is only present
-    # if some user data has been set, so be careful not to assume it
-    # exists.
-
-    def getUserData(self, key):
-        try:
-            return self._user_data[key][0]
-        except (AttributeError, KeyError):
-            return None
-
-    def setUserData(self, key, data, handler):
-        old = None
-        try:
-            d = self._user_data
-        except AttributeError:
-            d = {}
-            self._user_data = d
-        if d.has_key(key):
-            old = d[key][0]
-        if data is None:
-            # ignore handlers passed for None
-            handler = None
-            if old is not None:
-                del d[key]
-        else:
-            d[key] = (data, handler)
-        return old
-
-    def _call_user_data_handler(self, operation, src, dst):
-        if hasattr(self, "_user_data"):
-            for key, (data, handler) in self._user_data.items():
-                if handler is not None:
-                    handler.handle(operation, key, data, src, dst)
-
-    # minidom-specific API:
-
-    def unlink(self):
-        self.parentNode = self.ownerDocument = None
-        if self.childNodes:
-            for child in self.childNodes:
-                child.unlink()
-            self.childNodes = NodeList()
-        self.previousSibling = None
-        self.nextSibling = None
-
-defproperty(Node, "firstChild", doc="First child node, or None.")
-defproperty(Node, "lastChild",  doc="Last child node, or None.")
-defproperty(Node, "localName",  doc="Namespace-local name of this node.")
-
-
-def _append_child(self, node):
-    # fast path with less checks; usable by DOM builders if careful
-    childNodes = self.childNodes
-    if childNodes:
-        last = childNodes[-1]
-        node.__dict__["previousSibling"] = last
-        last.__dict__["nextSibling"] = node
-    childNodes.append(node)
-    node.__dict__["parentNode"] = self
-
-def _in_document(node):
-    # return True iff node is part of a document tree
-    while node is not None:
-        if node.nodeType == Node.DOCUMENT_NODE:
-            return True
-        node = node.parentNode
-    return False
-
-def _write_data(writer, data):
-    "Writes datachars to writer."
-    data = data.replace("&", "&amp;").replace("<", "&lt;")
-    data = data.replace("\"", "&quot;").replace(">", "&gt;")
-    writer.write(data)
-
-def _get_elements_by_tagName_helper(parent, name, rc):
-    for node in parent.childNodes:
-        if node.nodeType == Node.ELEMENT_NODE and \
-            (name == "*" or node.tagName == name):
-            rc.append(node)
-        _get_elements_by_tagName_helper(node, name, rc)
-    return rc
-
-def _get_elements_by_tagName_ns_helper(parent, nsURI, localName, rc):
-    for node in parent.childNodes:
-        if node.nodeType == Node.ELEMENT_NODE:
-            if ((localName == "*" or node.localName == localName) and
-                (nsURI == "*" or node.namespaceURI == nsURI)):
-                rc.append(node)
-            _get_elements_by_tagName_ns_helper(node, nsURI, localName, rc)
-    return rc
-
-class DocumentFragment(Node):
-    nodeType = Node.DOCUMENT_FRAGMENT_NODE
-    nodeName = "#document-fragment"
-    nodeValue = None
-    attributes = None
-    parentNode = None
-    _child_node_types = (Node.ELEMENT_NODE,
-                         Node.TEXT_NODE,
-                         Node.CDATA_SECTION_NODE,
-                         Node.ENTITY_REFERENCE_NODE,
-                         Node.PROCESSING_INSTRUCTION_NODE,
-                         Node.COMMENT_NODE,
-                         Node.NOTATION_NODE)
-
-    def __init__(self):
-        self.childNodes = NodeList()
-
-
-class Attr(Node):
-    nodeType = Node.ATTRIBUTE_NODE
-    attributes = None
-    ownerElement = None
-    specified = False
-    _is_id = False
-
-    _child_node_types = (Node.TEXT_NODE, Node.ENTITY_REFERENCE_NODE)
-
-    def __init__(self, qName, namespaceURI=EMPTY_NAMESPACE, localName=None,
-                 prefix=None):
-        # skip setattr for performance
-        d = self.__dict__
-        d["nodeName"] = d["name"] = qName
-        d["namespaceURI"] = namespaceURI
-        d["prefix"] = prefix
-        d['childNodes'] = NodeList()
-
-        # Add the single child node that represents the value of the attr
-        self.childNodes.append(Text())
-
-        # nodeValue and value are set elsewhere
-
-    def _get_localName(self):
-        return self.nodeName.split(":", 1)[-1]
-
-    def _get_name(self):
-        return self.name
-
-    def _get_specified(self):
-        return self.specified
-
-    def __setattr__(self, name, value):
-        d = self.__dict__
-        if name in ("value", "nodeValue"):
-            d["value"] = d["nodeValue"] = value
-            d2 = self.childNodes[0].__dict__
-            d2["data"] = d2["nodeValue"] = value
-            if self.ownerElement is not None:
-                _clear_id_cache(self.ownerElement)
-        elif name in ("name", "nodeName"):
-            d["name"] = d["nodeName"] = value
-            if self.ownerElement is not None:
-                _clear_id_cache(self.ownerElement)
-        else:
-            d[name] = value
-
-    def _set_prefix(self, prefix):
-        nsuri = self.namespaceURI
-        if prefix == "xmlns":
-            if nsuri and nsuri != XMLNS_NAMESPACE:
-                raise xml.dom.NamespaceErr(
-                    "illegal use of 'xmlns' prefix for the wrong namespace")
-        d = self.__dict__
-        d['prefix'] = prefix
-        if prefix is None:
-            newName = self.localName
-        else:
-            newName = "%s:%s" % (prefix, self.localName)
-        if self.ownerElement:
-            _clear_id_cache(self.ownerElement)
-        d['nodeName'] = d['name'] = newName
-
-    def _set_value(self, value):
-        d = self.__dict__
-        d['value'] = d['nodeValue'] = value
-        if self.ownerElement:
-            _clear_id_cache(self.ownerElement)
-        self.childNodes[0].data = value
-
-    def unlink(self):
-        # This implementation does not call the base implementation
-        # since most of that is not needed, and the expense of the
-        # method call is not warranted.  We duplicate the removal of
-        # children, but that's all we needed from the base class.
-        elem = self.ownerElement
-        if elem is not None:
-            del elem._attrs[self.nodeName]
-            del elem._attrsNS[(self.namespaceURI, self.localName)]
-            if self._is_id:
-                self._is_id = False
-                elem._magic_id_nodes -= 1
-                self.ownerDocument._magic_id_count -= 1
-        for child in self.childNodes:
-            child.unlink()
-        del self.childNodes[:]
-
-    def _get_isId(self):
-        if self._is_id:
-            return True
-        doc = self.ownerDocument
-        elem = self.ownerElement
-        if doc is None or elem is None:
-            return False
-
-        info = doc._get_elem_info(elem)
-        if info is None:
-            return False
-        if self.namespaceURI:
-            return info.isIdNS(self.namespaceURI, self.localName)
-        else:
-            return info.isId(self.nodeName)
-
-    def _get_schemaType(self):
-        doc = self.ownerDocument
-        elem = self.ownerElement
-        if doc is None or elem is None:
-            return _no_type
-
-        info = doc._get_elem_info(elem)
-        if info is None:
-            return _no_type
-        if self.namespaceURI:
-            return info.getAttributeTypeNS(self.namespaceURI, self.localName)
-        else:
-            return info.getAttributeType(self.nodeName)
-
-defproperty(Attr, "isId",       doc="True if this attribute is an ID.")
-defproperty(Attr, "localName",  doc="Namespace-local name of this attribute.")
-defproperty(Attr, "schemaType", doc="Schema type for this attribute.")
-
-
-class NamedNodeMap(NewStyle, GetattrMagic):
-    """The attribute list is a transient interface to the underlying
-    dictionaries.  Mutations here will change the underlying element's
-    dictionary.
-
-    Ordering is imposed artificially and does not reflect the order of
-    attributes as found in an input document.
-    """
-
-    __slots__ = ('_attrs', '_attrsNS', '_ownerElement')
-
-    def __init__(self, attrs, attrsNS, ownerElement):
-        self._attrs = attrs
-        self._attrsNS = attrsNS
-        self._ownerElement = ownerElement
-
-    def _get_length(self):
-        return len(self._attrs)
-
-    def item(self, index):
-        try:
-            return self[self._attrs.keys()[index]]
-        except IndexError:
-            return None
-
-    def items(self):
-        L = []
-        for node in self._attrs.values():
-            L.append((node.nodeName, node.value))
-        return L
-
-    def itemsNS(self):
-        L = []
-        for node in self._attrs.values():
-            L.append(((node.namespaceURI, node.localName), node.value))
-        return L
-
-    def has_key(self, key):
-        if isinstance(key, StringTypes):
-            return self._attrs.has_key(key)
-        else:
-            return self._attrsNS.has_key(key)
-
-    def keys(self):
-        return self._attrs.keys()
-
-    def keysNS(self):
-        return self._attrsNS.keys()
-
-    def values(self):
-        return self._attrs.values()
-
-    def get(self, name, value=None):
-        return self._attrs.get(name, value)
-
-    __len__ = _get_length
-
-    def __cmp__(self, other):
-        if self._attrs is getattr(other, "_attrs", None):
-            return 0
-        else:
-            return cmp(id(self), id(other))
-
-    def __getitem__(self, attname_or_tuple):
-        if isinstance(attname_or_tuple, _TupleType):
-            return self._attrsNS[attname_or_tuple]
-        else:
-            return self._attrs[attname_or_tuple]
-
-    # same as set
-    def __setitem__(self, attname, value):
-        if isinstance(value, StringTypes):
-            try:
-                node = self._attrs[attname]
-            except KeyError:
-                node = Attr(attname)
-                node.ownerDocument = self._ownerElement.ownerDocument
-                self.setNamedItem(node)
-            node.value = value
-        else:
-            if not isinstance(value, Attr):
-                raise TypeError, "value must be a string or Attr object"
-            node = value
-            self.setNamedItem(node)
-
-    def getNamedItem(self, name):
-        try:
-            return self._attrs[name]
-        except KeyError:
-            return None
-
-    def getNamedItemNS(self, namespaceURI, localName):
-        try:
-            return self._attrsNS[(namespaceURI, localName)]
-        except KeyError:
-            return None
-
-    def removeNamedItem(self, name):
-        n = self.getNamedItem(name)
-        if n is not None:
-            _clear_id_cache(self._ownerElement)
-            del self._attrs[n.nodeName]
-            del self._attrsNS[(n.namespaceURI, n.localName)]
-            if n.__dict__.has_key('ownerElement'):
-                n.__dict__['ownerElement'] = None
-            return n
-        else:
-            raise xml.dom.NotFoundErr()
-
-    def removeNamedItemNS(self, namespaceURI, localName):
-        n = self.getNamedItemNS(namespaceURI, localName)
-        if n is not None:
-            _clear_id_cache(self._ownerElement)
-            del self._attrsNS[(n.namespaceURI, n.localName)]
-            del self._attrs[n.nodeName]
-            if n.__dict__.has_key('ownerElement'):
-                n.__dict__['ownerElement'] = None
-            return n
-        else:
-            raise xml.dom.NotFoundErr()
-
-    def setNamedItem(self, node):
-        if not isinstance(node, Attr):
-            raise xml.dom.HierarchyRequestErr(
-                "%s cannot be child of %s" % (repr(node), repr(self)))
-        old = self._attrs.get(node.name)
-        if old:
-            old.unlink()
-        self._attrs[node.name] = node
-        self._attrsNS[(node.namespaceURI, node.localName)] = node
-        node.ownerElement = self._ownerElement
-        _clear_id_cache(node.ownerElement)
-        return old
-
-    def setNamedItemNS(self, node):
-        return self.setNamedItem(node)
-
-    def __delitem__(self, attname_or_tuple):
-        node = self[attname_or_tuple]
-        _clear_id_cache(node.ownerElement)
-        node.unlink()
-
-    def __getstate__(self):
-        return self._attrs, self._attrsNS, self._ownerElement
-
-    def __setstate__(self, state):
-        self._attrs, self._attrsNS, self._ownerElement = state
-
-defproperty(NamedNodeMap, "length",
-            doc="Number of nodes in the NamedNodeMap.")
-
-AttributeList = NamedNodeMap
-
-
-class TypeInfo(NewStyle):
-    __slots__ = 'namespace', 'name'
-
-    def __init__(self, namespace, name):
-        self.namespace = namespace
-        self.name = name
-
-    def __repr__(self):
-        if self.namespace:
-            return "<TypeInfo %r (from %r)>" % (self.name, self.namespace)
-        else:
-            return "<TypeInfo %r>" % self.name
-
-    def _get_name(self):
-        return self.name
-
-    def _get_namespace(self):
-        return self.namespace
-
-_no_type = TypeInfo(None, None)
-
-class Element(Node):
-    nodeType = Node.ELEMENT_NODE
-    nodeValue = None
-    schemaType = _no_type
-
-    _magic_id_nodes = 0
-
-    _child_node_types = (Node.ELEMENT_NODE,
-                         Node.PROCESSING_INSTRUCTION_NODE,
-                         Node.COMMENT_NODE,
-                         Node.TEXT_NODE,
-                         Node.CDATA_SECTION_NODE,
-                         Node.ENTITY_REFERENCE_NODE)
-
-    def __init__(self, tagName, namespaceURI=EMPTY_NAMESPACE, prefix=None,
-                 localName=None):
-        self.tagName = self.nodeName = tagName
-        self.prefix = prefix
-        self.namespaceURI = namespaceURI
-        self.childNodes = NodeList()
-
-        self._attrs = {}   # attributes are double-indexed:
-        self._attrsNS = {} #    tagName -> Attribute
-                           #    URI,localName -> Attribute
-                           # in the future: consider lazy generation
-                           # of attribute objects this is too tricky
-                           # for now because of headaches with
-                           # namespaces.
-
-    def _get_localName(self):
-        return self.tagName.split(":", 1)[-1]
-
-    def _get_tagName(self):
-        return self.tagName
-
-    def unlink(self):
-        for attr in self._attrs.values():
-            attr.unlink()
-        self._attrs = None
-        self._attrsNS = None
-        Node.unlink(self)
-
-    def getAttribute(self, attname):
-        try:
-            return self._attrs[attname].value
-        except KeyError:
-            return ""
-
-    def getAttributeNS(self, namespaceURI, localName):
-        try:
-            return self._attrsNS[(namespaceURI, localName)].value
-        except KeyError:
-            return ""
-
-    def setAttribute(self, attname, value):
-        attr = self.getAttributeNode(attname)
-        if attr is None:
-            attr = Attr(attname)
-            # for performance
-            d = attr.__dict__
-            d["value"] = d["nodeValue"] = value
-            d["ownerDocument"] = self.ownerDocument
-            self.setAttributeNode(attr)
-        elif value != attr.value:
-            d = attr.__dict__
-            d["value"] = d["nodeValue"] = value
-            if attr.isId:
-                _clear_id_cache(self)
-
-    def setAttributeNS(self, namespaceURI, qualifiedName, value):
-        prefix, localname = _nssplit(qualifiedName)
-        attr = self.getAttributeNodeNS(namespaceURI, localname)
-        if attr is None:
-            # for performance
-            attr = Attr(qualifiedName, namespaceURI, localname, prefix)
-            d = attr.__dict__
-            d["prefix"] = prefix
-            d["nodeName"] = qualifiedName
-            d["value"] = d["nodeValue"] = value
-            d["ownerDocument"] = self.ownerDocument
-            self.setAttributeNode(attr)
-        else:
-            d = attr.__dict__
-            if value != attr.value:
-                d["value"] = d["nodeValue"] = value
-                if attr.isId:
-                    _clear_id_cache(self)
-            if attr.prefix != prefix:
-                d["prefix"] = prefix
-                d["nodeName"] = qualifiedName
-
-    def getAttributeNode(self, attrname):
-        return self._attrs.get(attrname)
-
-    def getAttributeNodeNS(self, namespaceURI, localName):
-        return self._attrsNS.get((namespaceURI, localName))
-
-    def setAttributeNode(self, attr):
-        if attr.ownerElement not in (None, self):
-            raise xml.dom.InuseAttributeErr("attribute node already owned")
-        old1 = self._attrs.get(attr.name, None)
-        if old1 is not None:
-            self.removeAttributeNode(old1)
-        old2 = self._attrsNS.get((attr.namespaceURI, attr.localName), None)
-        if old2 is not None and old2 is not old1:
-            self.removeAttributeNode(old2)
-        _set_attribute_node(self, attr)
-
-        if old1 is not attr:
-            # It might have already been part of this node, in which case
-            # it doesn't represent a change, and should not be returned.
-            return old1
-        if old2 is not attr:
-            return old2
-
-    setAttributeNodeNS = setAttributeNode
-
-    def removeAttribute(self, name):
-        try:
-            attr = self._attrs[name]
-        except KeyError:
-            raise xml.dom.NotFoundErr()
-        self.removeAttributeNode(attr)
-
-    def removeAttributeNS(self, namespaceURI, localName):
-        try:
-            attr = self._attrsNS[(namespaceURI, localName)]
-        except KeyError:
-            raise xml.dom.NotFoundErr()
-        self.removeAttributeNode(attr)
-
-    def removeAttributeNode(self, node):
-        if node is None:
-            raise xml.dom.NotFoundErr()
-        try:
-            self._attrs[node.name]
-        except KeyError:
-            raise xml.dom.NotFoundErr()
-        _clear_id_cache(self)
-        node.unlink()
-        # Restore this since the node is still useful and otherwise
-        # unlinked
-        node.ownerDocument = self.ownerDocument
-
-    removeAttributeNodeNS = removeAttributeNode
-
-    def hasAttribute(self, name):
-        return self._attrs.has_key(name)
-
-    def hasAttributeNS(self, namespaceURI, localName):
-        return self._attrsNS.has_key((namespaceURI, localName))
-
-    def getElementsByTagName(self, name):
-        return _get_elements_by_tagName_helper(self, name, NodeList())
-
-    def getElementsByTagNameNS(self, namespaceURI, localName):
-        return _get_elements_by_tagName_ns_helper(
-            self, namespaceURI, localName, NodeList())
-
-    def __repr__(self):
-        return "<DOM Element: %s at %#x>" % (self.tagName, id(self))
-
-    def writexml(self, writer, indent="", addindent="", newl=""):
-        # indent = current indentation
-        # addindent = indentation to add to higher levels
-        # newl = newline string
-        writer.write(indent+"<" + self.tagName)
-
-        attrs = self._get_attributes()
-        a_names = attrs.keys()
-        a_names.sort()
-
-        for a_name in a_names:
-            writer.write(" %s=\"" % a_name)
-            _write_data(writer, attrs[a_name].value)
-            writer.write("\"")
-        if self.childNodes:
-            writer.write(">%s"%(newl))
-            for node in self.childNodes:
-                node.writexml(writer,indent+addindent,addindent,newl)
-            writer.write("%s</%s>%s" % (indent,self.tagName,newl))
-        else:
-            writer.write("/>%s"%(newl))
-
-    def _get_attributes(self):
-        return NamedNodeMap(self._attrs, self._attrsNS, self)
-
-    def hasAttributes(self):
-        if self._attrs:
-            return True
-        else:
-            return False
-
-    # DOM Level 3 attributes, based on the 22 Oct 2002 draft
-
-    def setIdAttribute(self, name):
-        idAttr = self.getAttributeNode(name)
-        self.setIdAttributeNode(idAttr)
-
-    def setIdAttributeNS(self, namespaceURI, localName):
-        idAttr = self.getAttributeNodeNS(namespaceURI, localName)
-        self.setIdAttributeNode(idAttr)
-
-    def setIdAttributeNode(self, idAttr):
-        if idAttr is None or not self.isSameNode(idAttr.ownerElement):
-            raise xml.dom.NotFoundErr()
-        if _get_containing_entref(self) is not None:
-            raise xml.dom.NoModificationAllowedErr()
-        if not idAttr._is_id:
-            idAttr.__dict__['_is_id'] = True
-            self._magic_id_nodes += 1
-            self.ownerDocument._magic_id_count += 1
-            _clear_id_cache(self)
-
-defproperty(Element, "attributes",
-            doc="NamedNodeMap of attributes on the element.")
-defproperty(Element, "localName",
-            doc="Namespace-local name of this element.")
-
-
-def _set_attribute_node(element, attr):
-    _clear_id_cache(element)
-    element._attrs[attr.name] = attr
-    element._attrsNS[(attr.namespaceURI, attr.localName)] = attr
-
-    # This creates a circular reference, but Element.unlink()
-    # breaks the cycle since the references to the attribute
-    # dictionaries are tossed.
-    attr.__dict__['ownerElement'] = element
-
-
-class Childless:
-    """Mixin that makes childless-ness easy to implement and avoids
-    the complexity of the Node methods that deal with children.
-    """
-
-    attributes = None
-    childNodes = EmptyNodeList()
-    firstChild = None
-    lastChild = None
-
-    def _get_firstChild(self):
-        return None
-
-    def _get_lastChild(self):
-        return None
-
-    def appendChild(self, node):
-        raise xml.dom.HierarchyRequestErr(
-            self.nodeName + " nodes cannot have children")
-
-    def hasChildNodes(self):
-        return False
-
-    def insertBefore(self, newChild, refChild):
-        raise xml.dom.HierarchyRequestErr(
-            self.nodeName + " nodes do not have children")
-
-    def removeChild(self, oldChild):
-        raise xml.dom.NotFoundErr(
-            self.nodeName + " nodes do not have children")
-
-    def replaceChild(self, newChild, oldChild):
-        raise xml.dom.HierarchyRequestErr(
-            self.nodeName + " nodes do not have children")
-
-
-class ProcessingInstruction(Childless, Node):
-    nodeType = Node.PROCESSING_INSTRUCTION_NODE
-
-    def __init__(self, target, data):
-        self.target = self.nodeName = target
-        self.data = self.nodeValue = data
-
-    def _get_data(self):
-        return self.data
-    def _set_data(self, value):
-        d = self.__dict__
-        d['data'] = d['nodeValue'] = value
-
-    def _get_target(self):
-        return self.target
-    def _set_target(self, value):
-        d = self.__dict__
-        d['target'] = d['nodeName'] = value
-
-    def __setattr__(self, name, value):
-        if name == "data" or name == "nodeValue":
-            self.__dict__['data'] = self.__dict__['nodeValue'] = value
-        elif name == "target" or name == "nodeName":
-            self.__dict__['target'] = self.__dict__['nodeName'] = value
-        else:
-            self.__dict__[name] = value
-
-    def writexml(self, writer, indent="", addindent="", newl=""):
-        writer.write("%s<?%s %s?>%s" % (indent,self.target, self.data, newl))
-
-
-class CharacterData(Childless, Node):
-    def _get_length(self):
-        return len(self.data)
-    __len__ = _get_length
-
-    def _get_data(self):
-        return self.__dict__['data']
-    def _set_data(self, data):
-        d = self.__dict__
-        d['data'] = d['nodeValue'] = data
-
-    _get_nodeValue = _get_data
-    _set_nodeValue = _set_data
-
-    def __setattr__(self, name, value):
-        if name == "data" or name == "nodeValue":
-            self.__dict__['data'] = self.__dict__['nodeValue'] = value
-        else:
-            self.__dict__[name] = value
-
-    def __repr__(self):
-        data = self.data
-        if len(data) > 10:
-            dotdotdot = "..."
-        else:
-            dotdotdot = ""
-        return "<DOM %s node \"%s%s\">" % (
-            self.__class__.__name__, data[0:10], dotdotdot)
-
-    def substringData(self, offset, count):
-        if offset < 0:
-            raise xml.dom.IndexSizeErr("offset cannot be negative")
-        if offset >= len(self.data):
-            raise xml.dom.IndexSizeErr("offset cannot be beyond end of data")
-        if count < 0:
-            raise xml.dom.IndexSizeErr("count cannot be negative")
-        return self.data[offset:offset+count]
-
-    def appendData(self, arg):
-        self.data = self.data + arg
-
-    def insertData(self, offset, arg):
-        if offset < 0:
-            raise xml.dom.IndexSizeErr("offset cannot be negative")
-        if offset >= len(self.data):
-            raise xml.dom.IndexSizeErr("offset cannot be beyond end of data")
-        if arg:
-            self.data = "%s%s%s" % (
-                self.data[:offset], arg, self.data[offset:])
-
-    def deleteData(self, offset, count):
-        if offset < 0:
-            raise xml.dom.IndexSizeErr("offset cannot be negative")
-        if offset >= len(self.data):
-            raise xml.dom.IndexSizeErr("offset cannot be beyond end of data")
-        if count < 0:
-            raise xml.dom.IndexSizeErr("count cannot be negative")
-        if count:
-            self.data = self.data[:offset] + self.data[offset+count:]
-
-    def replaceData(self, offset, count, arg):
-        if offset < 0:
-            raise xml.dom.IndexSizeErr("offset cannot be negative")
-        if offset >= len(self.data):
-            raise xml.dom.IndexSizeErr("offset cannot be beyond end of data")
-        if count < 0:
-            raise xml.dom.IndexSizeErr("count cannot be negative")
-        if count:
-            self.data = "%s%s%s" % (
-                self.data[:offset], arg, self.data[offset+count:])
-
-defproperty(CharacterData, "length", doc="Length of the string data.")
-
-
-class Text(CharacterData):
-    # Make sure we don't add an instance __dict__ if we don't already
-    # have one, at least when that's possible:
-    # XXX this does not work, CharacterData is an old-style class
-    # __slots__ = ()
-
-    nodeType = Node.TEXT_NODE
-    nodeName = "#text"
-    attributes = None
-
-    def splitText(self, offset):
-        if offset < 0 or offset > len(self.data):
-            raise xml.dom.IndexSizeErr("illegal offset value")
-        newText = self.__class__()
-        newText.data = self.data[offset:]
-        newText.ownerDocument = self.ownerDocument
-        next = self.nextSibling
-        if self.parentNode and self in self.parentNode.childNodes:
-            if next is None:
-                self.parentNode.appendChild(newText)
-            else:
-                self.parentNode.insertBefore(newText, next)
-        self.data = self.data[:offset]
-        return newText
-
-    def writexml(self, writer, indent="", addindent="", newl=""):
-        _write_data(writer, "%s%s%s"%(indent, self.data, newl))
-
-    # DOM Level 3 (WD 9 April 2002)
-
-    def _get_wholeText(self):
-        L = [self.data]
-        n = self.previousSibling
-        while n is not None:
-            if n.nodeType in (Node.TEXT_NODE, Node.CDATA_SECTION_NODE):
-                L.insert(0, n.data)
-                n = n.previousSibling
-            else:
-                break
-        n = self.nextSibling
-        while n is not None:
-            if n.nodeType in (Node.TEXT_NODE, Node.CDATA_SECTION_NODE):
-                L.append(n.data)
-                n = n.nextSibling
-            else:
-                break
-        return ''.join(L)
-
-    def replaceWholeText(self, content):
-        # XXX This needs to be seriously changed if minidom ever
-        # supports EntityReference nodes.
-        parent = self.parentNode
-        n = self.previousSibling
-        while n is not None:
-            if n.nodeType in (Node.TEXT_NODE, Node.CDATA_SECTION_NODE):
-                next = n.previousSibling
-                parent.removeChild(n)
-                n = next
-            else:
-                break
-        n = self.nextSibling
-        if not content:
-            parent.removeChild(self)
-        while n is not None:
-            if n.nodeType in (Node.TEXT_NODE, Node.CDATA_SECTION_NODE):
-                next = n.nextSibling
-                parent.removeChild(n)
-                n = next
-            else:
-                break
-        if content:
-            d = self.__dict__
-            d['data'] = content
-            d['nodeValue'] = content
-            return self
-        else:
-            return None
-
-    def _get_isWhitespaceInElementContent(self):
-        if self.data.strip():
-            return False
-        elem = _get_containing_element(self)
-        if elem is None:
-            return False
-        info = self.ownerDocument._get_elem_info(elem)
-        if info is None:
-            return False
-        else:
-            return info.isElementContent()
-
-defproperty(Text, "isWhitespaceInElementContent",
-            doc="True iff this text node contains only whitespace"
-                " and is in element content.")
-defproperty(Text, "wholeText",
-            doc="The text of all logically-adjacent text nodes.")
-
-
-def _get_containing_element(node):
-    c = node.parentNode
-    while c is not None:
-        if c.nodeType == Node.ELEMENT_NODE:
-            return c
-        c = c.parentNode
-    return None
-
-def _get_containing_entref(node):
-    c = node.parentNode
-    while c is not None:
-        if c.nodeType == Node.ENTITY_REFERENCE_NODE:
-            return c
-        c = c.parentNode
-    return None
-
-
-class Comment(Childless, CharacterData):
-    nodeType = Node.COMMENT_NODE
-    nodeName = "#comment"
-
-    def __init__(self, data):
-        self.data = self.nodeValue = data
-
-    def writexml(self, writer, indent="", addindent="", newl=""):
-        writer.write("%s<!--%s-->%s" % (indent, self.data, newl))
-
-
-class CDATASection(Text):
-    # Make sure we don't add an instance __dict__ if we don't already
-    # have one, at least when that's possible:
-    # XXX this does not work, Text is an old-style class
-    # __slots__ = ()
-
-    nodeType = Node.CDATA_SECTION_NODE
-    nodeName = "#cdata-section"
-
-    def writexml(self, writer, indent="", addindent="", newl=""):
-        if self.data.find("]]>") >= 0:
-            raise ValueError("']]>' not allowed in a CDATA section")
-        writer.write("<![CDATA[%s]]>" % self.data)
-
-
-class ReadOnlySequentialNamedNodeMap(NewStyle, GetattrMagic):
-    __slots__ = '_seq',
-
-    def __init__(self, seq=()):
-        # seq should be a list or tuple
-        self._seq = seq
-
-    def __len__(self):
-        return len(self._seq)
-
-    def _get_length(self):
-        return len(self._seq)
-
-    def getNamedItem(self, name):
-        for n in self._seq:
-            if n.nodeName == name:
-                return n
-
-    def getNamedItemNS(self, namespaceURI, localName):
-        for n in self._seq:
-            if n.namespaceURI == namespaceURI and n.localName == localName:
-                return n
-
-    def __getitem__(self, name_or_tuple):
-        if isinstance(name_or_tuple, _TupleType):
-            node = self.getNamedItemNS(*name_or_tuple)
-        else:
-            node = self.getNamedItem(name_or_tuple)
-        if node is None:
-            raise KeyError, name_or_tuple
-        return node
-
-    def item(self, index):
-        if index < 0:
-            return None
-        try:
-            return self._seq[index]
-        except IndexError:
-            return None
-
-    def removeNamedItem(self, name):
-        raise xml.dom.NoModificationAllowedErr(
-            "NamedNodeMap instance is read-only")
-
-    def removeNamedItemNS(self, namespaceURI, localName):
-        raise xml.dom.NoModificationAllowedErr(
-            "NamedNodeMap instance is read-only")
-
-    def setNamedItem(self, node):
-        raise xml.dom.NoModificationAllowedErr(
-            "NamedNodeMap instance is read-only")
-
-    def setNamedItemNS(self, node):
-        raise xml.dom.NoModificationAllowedErr(
-            "NamedNodeMap instance is read-only")
-
-    def __getstate__(self):
-        return [self._seq]
-
-    def __setstate__(self, state):
-        self._seq = state[0]
-
-defproperty(ReadOnlySequentialNamedNodeMap, "length",
-            doc="Number of entries in the NamedNodeMap.")
-
-
-class Identified:
-    """Mix-in class that supports the publicId and systemId attributes."""
-
-    # XXX this does not work, this is an old-style class
-    # __slots__ = 'publicId', 'systemId'
-
-    def _identified_mixin_init(self, publicId, systemId):
-        self.publicId = publicId
-        self.systemId = systemId
-
-    def _get_publicId(self):
-        return self.publicId
-
-    def _get_systemId(self):
-        return self.systemId
-
-class DocumentType(Identified, Childless, Node):
-    nodeType = Node.DOCUMENT_TYPE_NODE
-    nodeValue = None
-    name = None
-    publicId = None
-    systemId = None
-    internalSubset = None
-
-    def __init__(self, qualifiedName):
-        self.entities = ReadOnlySequentialNamedNodeMap()
-        self.notations = ReadOnlySequentialNamedNodeMap()
-        if qualifiedName:
-            prefix, localname = _nssplit(qualifiedName)
-            self.name = localname
-        self.nodeName = self.name
-
-    def _get_internalSubset(self):
-        return self.internalSubset
-
-    def cloneNode(self, deep):
-        if self.ownerDocument is None:
-            # it's ok
-            clone = DocumentType(None)
-            clone.name = self.name
-            clone.nodeName = self.name
-            operation = xml.dom.UserDataHandler.NODE_CLONED
-            if deep:
-                clone.entities._seq = []
-                clone.notations._seq = []
-                for n in self.notations._seq:
-                    notation = Notation(n.nodeName, n.publicId, n.systemId)
-                    clone.notations._seq.append(notation)
-                    n._call_user_data_handler(operation, n, notation)
-                for e in self.entities._seq:
-                    entity = Entity(e.nodeName, e.publicId, e.systemId,
-                                    e.notationName)
-                    entity.actualEncoding = e.actualEncoding
-                    entity.encoding = e.encoding
-                    entity.version = e.version
-                    clone.entities._seq.append(entity)
-                    e._call_user_data_handler(operation, n, entity)
-            self._call_user_data_handler(operation, self, clone)
-            return clone
-        else:
-            return None
-
-    def writexml(self, writer, indent="", addindent="", newl=""):
-        writer.write("<!DOCTYPE ")
-        writer.write(self.name)
-        if self.publicId:
-            writer.write("%s  PUBLIC '%s'%s  '%s'"
-                         % (newl, self.publicId, newl, self.systemId))
-        elif self.systemId:
-            writer.write("%s  SYSTEM '%s'" % (newl, self.systemId))
-        if self.internalSubset is not None:
-            writer.write(" [")
-            writer.write(self.internalSubset)
-            writer.write("]")
-        writer.write(">"+newl)
-
-class Entity(Identified, Node):
-    attributes = None
-    nodeType = Node.ENTITY_NODE
-    nodeValue = None
-
-    actualEncoding = None
-    encoding = None
-    version = None
-
-    def __init__(self, name, publicId, systemId, notation):
-        self.nodeName = name
-        self.notationName = notation
-        self.childNodes = NodeList()
-        self._identified_mixin_init(publicId, systemId)
-
-    def _get_actualEncoding(self):
-        return self.actualEncoding
-
-    def _get_encoding(self):
-        return self.encoding
-
-    def _get_version(self):
-        return self.version
-
-    def appendChild(self, newChild):
-        raise xml.dom.HierarchyRequestErr(
-            "cannot append children to an entity node")
-
-    def insertBefore(self, newChild, refChild):
-        raise xml.dom.HierarchyRequestErr(
-            "cannot insert children below an entity node")
-
-    def removeChild(self, oldChild):
-        raise xml.dom.HierarchyRequestErr(
-            "cannot remove children from an entity node")
-
-    def replaceChild(self, newChild, oldChild):
-        raise xml.dom.HierarchyRequestErr(
-            "cannot replace children of an entity node")
-
-class Notation(Identified, Childless, Node):
-    nodeType = Node.NOTATION_NODE
-    nodeValue = None
-
-    def __init__(self, name, publicId, systemId):
-        self.nodeName = name
-        self._identified_mixin_init(publicId, systemId)
-
-
-class DOMImplementation(DOMImplementationLS):
-    _features = [("core", "1.0"),
-                 ("core", "2.0"),
-                 ("core", "3.0"),
-                 ("core", None),
-                 ("xml", "1.0"),
-                 ("xml", "2.0"),
-                 ("xml", "3.0"),
-                 ("xml", None),
-                 ("ls-load", "3.0"),
-                 ("ls-load", None),
-                 ]
-
-    def hasFeature(self, feature, version):
-        if version == "":
-            version = None
-        return (feature.lower(), version) in self._features
-
-    def createDocument(self, namespaceURI, qualifiedName, doctype):
-        if doctype and doctype.parentNode is not None:
-            raise xml.dom.WrongDocumentErr(
-                "doctype object owned by another DOM tree")
-        doc = self._create_document()
-
-        add_root_element = not (namespaceURI is None
-                                and qualifiedName is None
-                                and doctype is None)
-
-        if not qualifiedName and add_root_element:
-            # The spec is unclear what to raise here; SyntaxErr
-            # would be the other obvious candidate. Since Xerces raises
-            # InvalidCharacterErr, and since SyntaxErr is not listed
-            # for createDocument, that seems to be the better choice.
-            # XXX: need to check for illegal characters here and in
-            # createElement.
-
-            # DOM Level III clears this up when talking about the return value
-            # of this function.  If namespaceURI, qName and DocType are
-            # Null the document is returned without a document element
-            # Otherwise if doctype or namespaceURI are not None
-            # Then we go back to the above problem
-            raise xml.dom.InvalidCharacterErr("Element with no name")
-
-        if add_root_element:
-            prefix, localname = _nssplit(qualifiedName)
-            if prefix == "xml" \
-               and namespaceURI != "http://www.w3.org/XML/1998/namespace":
-                raise xml.dom.NamespaceErr("illegal use of 'xml' prefix")
-            if prefix and not namespaceURI:
-                raise xml.dom.NamespaceErr(
-                    "illegal use of prefix without namespaces")
-            element = doc.createElementNS(namespaceURI, qualifiedName)
-            if doctype:
-                doc.appendChild(doctype)
-            doc.appendChild(element)
-
-        if doctype:
-            doctype.parentNode = doctype.ownerDocument = doc
-
-        doc.doctype = doctype
-        doc.implementation = self
-        return doc
-
-    def createDocumentType(self, qualifiedName, publicId, systemId):
-        doctype = DocumentType(qualifiedName)
-        doctype.publicId = publicId
-        doctype.systemId = systemId
-        return doctype
-
-    # DOM Level 3 (WD 9 April 2002)
-
-    def getInterface(self, feature):
-        if self.hasFeature(feature, None):
-            return self
-        else:
-            return None
-
-    # internal
-    def _create_document(self):
-        return Document()
-
-class ElementInfo(NewStyle):
-    """Object that represents content-model information for an element.
-
-    This implementation is not expected to be used in practice; DOM
-    builders should provide implementations which do the right thing
-    using information available to it.
-
-    """
-
-    __slots__ = 'tagName',
-
-    def __init__(self, name):
-        self.tagName = name
-
-    def getAttributeType(self, aname):
-        return _no_type
-
-    def getAttributeTypeNS(self, namespaceURI, localName):
-        return _no_type
-
-    def isElementContent(self):
-        return False
-
-    def isEmpty(self):
-        """Returns true iff this element is declared to have an EMPTY
-        content model."""
-        return False
-
-    def isId(self, aname):
-        """Returns true iff the named attribte is a DTD-style ID."""
-        return False
-
-    def isIdNS(self, namespaceURI, localName):
-        """Returns true iff the identified attribute is a DTD-style ID."""
-        return False
-
-    def __getstate__(self):
-        return self.tagName
-
-    def __setstate__(self, state):
-        self.tagName = state
-
-def _clear_id_cache(node):
-    if node.nodeType == Node.DOCUMENT_NODE:
-        node._id_cache.clear()
-        node._id_search_stack = None
-    elif _in_document(node):
-        node.ownerDocument._id_cache.clear()
-        node.ownerDocument._id_search_stack= None
-
-class Document(Node, DocumentLS):
-    _child_node_types = (Node.ELEMENT_NODE, Node.PROCESSING_INSTRUCTION_NODE,
-                         Node.COMMENT_NODE, Node.DOCUMENT_TYPE_NODE)
-
-    nodeType = Node.DOCUMENT_NODE
-    nodeName = "#document"
-    nodeValue = None
-    attributes = None
-    doctype = None
-    parentNode = None
-    previousSibling = nextSibling = None
-
-    implementation = DOMImplementation()
-
-    # Document attributes from Level 3 (WD 9 April 2002)
-
-    actualEncoding = None
-    encoding = None
-    standalone = None
-    version = None
-    strictErrorChecking = False
-    errorHandler = None
-    documentURI = None
-
-    _magic_id_count = 0
-
-    def __init__(self):
-        self.childNodes = NodeList()
-        # mapping of (namespaceURI, localName) -> ElementInfo
-        #        and tagName -> ElementInfo
-        self._elem_info = {}
-        self._id_cache = {}
-        self._id_search_stack = None
-
-    def _get_elem_info(self, element):
-        if element.namespaceURI:
-            key = element.namespaceURI, element.localName
-        else:
-            key = element.tagName
-        return self._elem_info.get(key)
-
-    def _get_actualEncoding(self):
-        return self.actualEncoding
-
-    def _get_doctype(self):
-        return self.doctype
-
-    def _get_documentURI(self):
-        return self.documentURI
-
-    def _get_encoding(self):
-        return self.encoding
-
-    def _get_errorHandler(self):
-        return self.errorHandler
-
-    def _get_standalone(self):
-        return self.standalone
-
-    def _get_strictErrorChecking(self):
-        return self.strictErrorChecking
-
-    def _get_version(self):
-        return self.version
-
-    def appendChild(self, node):
-        if node.nodeType not in self._child_node_types:
-            raise xml.dom.HierarchyRequestErr(
-                "%s cannot be child of %s" % (repr(node), repr(self)))
-        if node.parentNode is not None:
-            # This needs to be done before the next test since this
-            # may *be* the document element, in which case it should
-            # end up re-ordered to the end.
-            node.parentNode.removeChild(node)
-
-        if node.nodeType == Node.ELEMENT_NODE \
-           and self._get_documentElement():
-            raise xml.dom.HierarchyRequestErr(
-                "two document elements disallowed")
-        return Node.appendChild(self, node)
-
-    def removeChild(self, oldChild):
-        try:
-            self.childNodes.remove(oldChild)
-        except ValueError:
-            raise xml.dom.NotFoundErr()
-        oldChild.nextSibling = oldChild.previousSibling = None
-        oldChild.parentNode = None
-        if self.documentElement is oldChild:
-            self.documentElement = None
-
-        return oldChild
-
-    def _get_documentElement(self):
-        for node in self.childNodes:
-            if node.nodeType == Node.ELEMENT_NODE:
-                return node
-
-    def unlink(self):
-        if self.doctype is not None:
-            self.doctype.unlink()
-            self.doctype = None
-        Node.unlink(self)
-
-    def cloneNode(self, deep):
-        if not deep:
-            return None
-        clone = self.implementation.createDocument(None, None, None)
-        clone.encoding = self.encoding
-        clone.standalone = self.standalone
-        clone.version = self.version
-        for n in self.childNodes:
-            childclone = _clone_node(n, deep, clone)
-            assert childclone.ownerDocument.isSameNode(clone)
-            clone.childNodes.append(childclone)
-            if childclone.nodeType == Node.DOCUMENT_NODE:
-                assert clone.documentElement is None
-            elif childclone.nodeType == Node.DOCUMENT_TYPE_NODE:
-                assert clone.doctype is None
-                clone.doctype = childclone
-            childclone.parentNode = clone
-        self._call_user_data_handler(xml.dom.UserDataHandler.NODE_CLONED,
-                                     self, clone)
-        return clone
-
-    def createDocumentFragment(self):
-        d = DocumentFragment()
-        d.ownerDocument = self
-        return d
-
-    def createElement(self, tagName):
-        e = Element(tagName)
-        e.ownerDocument = self
-        return e
-
-    def createTextNode(self, data):
-        if not isinstance(data, StringTypes):
-            raise TypeError, "node contents must be a string"
-        t = Text()
-        t.data = data
-        t.ownerDocument = self
-        return t
-
-    def createCDATASection(self, data):
-        if not isinstance(data, StringTypes):
-            raise TypeError, "node contents must be a string"
-        c = CDATASection()
-        c.data = data
-        c.ownerDocument = self
-        return c
-
-    def createComment(self, data):
-        c = Comment(data)
-        c.ownerDocument = self
-        return c
-
-    def createProcessingInstruction(self, target, data):
-        p = ProcessingInstruction(target, data)
-        p.ownerDocument = self
-        return p
-
-    def createAttribute(self, qName):
-        a = Attr(qName)
-        a.ownerDocument = self
-        a.value = ""
-        return a
-
-    def createElementNS(self, namespaceURI, qualifiedName):
-        prefix, localName = _nssplit(qualifiedName)
-        e = Element(qualifiedName, namespaceURI, prefix)
-        e.ownerDocument = self
-        return e
-
-    def createAttributeNS(self, namespaceURI, qualifiedName):
-        prefix, localName = _nssplit(qualifiedName)
-        a = Attr(qualifiedName, namespaceURI, localName, prefix)
-        a.ownerDocument = self
-        a.value = ""
-        return a
-
-    # A couple of implementation-specific helpers to create node types
-    # not supported by the W3C DOM specs:
-
-    def _create_entity(self, name, publicId, systemId, notationName):
-        e = Entity(name, publicId, systemId, notationName)
-        e.ownerDocument = self
-        return e
-
-    def _create_notation(self, name, publicId, systemId):
-        n = Notation(name, publicId, systemId)
-        n.ownerDocument = self
-        return n
-
-    def getElementById(self, id):
-        if self._id_cache.has_key(id):
-            return self._id_cache[id]
-        if not (self._elem_info or self._magic_id_count):
-            return None
-
-        stack = self._id_search_stack
-        if stack is None:
-            # we never searched before, or the cache has been cleared
-            stack = [self.documentElement]
-            self._id_search_stack = stack
-        elif not stack:
-            # Previous search was completed and cache is still valid;
-            # no matching node.
-            return None
-
-        result = None
-        while stack:
-            node = stack.pop()
-            # add child elements to stack for continued searching
-            stack.extend([child for child in node.childNodes
-                          if child.nodeType in _nodeTypes_with_children])
-            # check this node
-            info = self._get_elem_info(node)
-            if info:
-                # We have to process all ID attributes before
-                # returning in order to get all the attributes set to
-                # be IDs using Element.setIdAttribute*().
-                for attr in node.attributes.values():
-                    if attr.namespaceURI:
-                        if info.isIdNS(attr.namespaceURI, attr.localName):
-                            self._id_cache[attr.value] = node
-                            if attr.value == id:
-                                result = node
-                            elif not node._magic_id_nodes:
-                                break
-                    elif info.isId(attr.name):
-                        self._id_cache[attr.value] = node
-                        if attr.value == id:
-                            result = node
-                        elif not node._magic_id_nodes:
-                            break
-                    elif attr._is_id:
-                        self._id_cache[attr.value] = node
-                        if attr.value == id:
-                            result = node
-                        elif node._magic_id_nodes == 1:
-                            break
-            elif node._magic_id_nodes:
-                for attr in node.attributes.values():
-                    if attr._is_id:
-                        self._id_cache[attr.value] = node
-                        if attr.value == id:
-                            result = node
-            if result is not None:
-                break
-        return result
-
-    def getElementsByTagName(self, name):
-        return _get_elements_by_tagName_helper(self, name, NodeList())
-
-    def getElementsByTagNameNS(self, namespaceURI, localName):
-        return _get_elements_by_tagName_ns_helper(
-            self, namespaceURI, localName, NodeList())
-
-    def isSupported(self, feature, version):
-        return self.implementation.hasFeature(feature, version)
-
-    def importNode(self, node, deep):
-        if node.nodeType == Node.DOCUMENT_NODE:
-            raise xml.dom.NotSupportedErr("cannot import document nodes")
-        elif node.nodeType == Node.DOCUMENT_TYPE_NODE:
-            raise xml.dom.NotSupportedErr("cannot import document type nodes")
-        return _clone_node(node, deep, self)
-
-    def writexml(self, writer, indent="", addindent="", newl="",
-                 encoding = None):
-        if encoding is None:
-            writer.write('<?xml version="1.0" ?>'+newl)
-        else:
-            writer.write('<?xml version="1.0" encoding="%s"?>%s' % (encoding, newl))
-        for node in self.childNodes:
-            node.writexml(writer, indent, addindent, newl)
-
-    # DOM Level 3 (WD 9 April 2002)
-
-    def renameNode(self, n, namespaceURI, name):
-        if n.ownerDocument is not self:
-            raise xml.dom.WrongDocumentErr(
-                "cannot rename nodes from other documents;\n"
-                "expected %s,\nfound %s" % (self, n.ownerDocument))
-        if n.nodeType not in (Node.ELEMENT_NODE, Node.ATTRIBUTE_NODE):
-            raise xml.dom.NotSupportedErr(
-                "renameNode() only applies to element and attribute nodes")
-        if namespaceURI != EMPTY_NAMESPACE:
-            if ':' in name:
-                prefix, localName = name.split(':', 1)
-                if (  prefix == "xmlns"
-                      and namespaceURI != xml.dom.XMLNS_NAMESPACE):
-                    raise xml.dom.NamespaceErr(
-                        "illegal use of 'xmlns' prefix")
-            else:
-                if (  name == "xmlns"
-                      and namespaceURI != xml.dom.XMLNS_NAMESPACE
-                      and n.nodeType == Node.ATTRIBUTE_NODE):
-                    raise xml.dom.NamespaceErr(
-                        "illegal use of the 'xmlns' attribute")
-                prefix = None
-                localName = name
-        else:
-            prefix = None
-            localName = None
-        if n.nodeType == Node.ATTRIBUTE_NODE:
-            element = n.ownerElement
-            if element is not None:
-                is_id = n._is_id
-                element.removeAttributeNode(n)
-        else:
-            element = None
-        # avoid __setattr__
-        d = n.__dict__
-        d['prefix'] = prefix
-        d['localName'] = localName
-        d['namespaceURI'] = namespaceURI
-        d['nodeName'] = name
-        if n.nodeType == Node.ELEMENT_NODE:
-            d['tagName'] = name
-        else:
-            # attribute node
-            d['name'] = name
-            if element is not None:
-                element.setAttributeNode(n)
-                if is_id:
-                    element.setIdAttributeNode(n)
-        # It's not clear from a semantic perspective whether we should
-        # call the user data handlers for the NODE_RENAMED event since
-        # we're re-using the existing node.  The draft spec has been
-        # interpreted as meaning "no, don't call the handler unless a
-        # new node is created."
-        return n
-
-defproperty(Document, "documentElement",
-            doc="Top-level element of this document.")
-
-
-def _clone_node(node, deep, newOwnerDocument):
-    """
-    Clone a node and give it the new owner document.
-    Called by Node.cloneNode and Document.importNode
-    """
-    if node.ownerDocument.isSameNode(newOwnerDocument):
-        operation = xml.dom.UserDataHandler.NODE_CLONED
-    else:
-        operation = xml.dom.UserDataHandler.NODE_IMPORTED
-    if node.nodeType == Node.ELEMENT_NODE:
-        clone = newOwnerDocument.createElementNS(node.namespaceURI,
-                                                 node.nodeName)
-        for attr in node.attributes.values():
-            clone.setAttributeNS(attr.namespaceURI, attr.nodeName, attr.value)
-            a = clone.getAttributeNodeNS(attr.namespaceURI, attr.localName)
-            a.specified = attr.specified
-
-        if deep:
-            for child in node.childNodes:
-                c = _clone_node(child, deep, newOwnerDocument)
-                clone.appendChild(c)
-
-    elif node.nodeType == Node.DOCUMENT_FRAGMENT_NODE:
-        clone = newOwnerDocument.createDocumentFragment()
-        if deep:
-            for child in node.childNodes:
-                c = _clone_node(child, deep, newOwnerDocument)
-                clone.appendChild(c)
-
-    elif node.nodeType == Node.TEXT_NODE:
-        clone = newOwnerDocument.createTextNode(node.data)
-    elif node.nodeType == Node.CDATA_SECTION_NODE:
-        clone = newOwnerDocument.createCDATASection(node.data)
-    elif node.nodeType == Node.PROCESSING_INSTRUCTION_NODE:
-        clone = newOwnerDocument.createProcessingInstruction(node.target,
-                                                             node.data)
-    elif node.nodeType == Node.COMMENT_NODE:
-        clone = newOwnerDocument.createComment(node.data)
-    elif node.nodeType == Node.ATTRIBUTE_NODE:
-        clone = newOwnerDocument.createAttributeNS(node.namespaceURI,
-                                                   node.nodeName)
-        clone.specified = True
-        clone.value = node.value
-    elif node.nodeType == Node.DOCUMENT_TYPE_NODE:
-        assert node.ownerDocument is not newOwnerDocument
-        operation = xml.dom.UserDataHandler.NODE_IMPORTED
-        clone = newOwnerDocument.implementation.createDocumentType(
-            node.name, node.publicId, node.systemId)
-        clone.ownerDocument = newOwnerDocument
-        if deep:
-            clone.entities._seq = []
-            clone.notations._seq = []
-            for n in node.notations._seq:
-                notation = Notation(n.nodeName, n.publicId, n.systemId)
-                notation.ownerDocument = newOwnerDocument
-                clone.notations._seq.append(notation)
-                if hasattr(n, '_call_user_data_handler'):
-                    n._call_user_data_handler(operation, n, notation)
-            for e in node.entities._seq:
-                entity = Entity(e.nodeName, e.publicId, e.systemId,
-                                e.notationName)
-                entity.actualEncoding = e.actualEncoding
-                entity.encoding = e.encoding
-                entity.version = e.version
-                entity.ownerDocument = newOwnerDocument
-                clone.entities._seq.append(entity)
-                if hasattr(e, '_call_user_data_handler'):
-                    e._call_user_data_handler(operation, n, entity)
-    else:
-        # Note the cloning of Document and DocumentType nodes is
-        # implemenetation specific.  minidom handles those cases
-        # directly in the cloneNode() methods.
-        raise xml.dom.NotSupportedErr("Cannot clone node %s" % repr(node))
-
-    # Check for _call_user_data_handler() since this could conceivably
-    # used with other DOM implementations (one of the FourThought
-    # DOMs, perhaps?).
-    if hasattr(node, '_call_user_data_handler'):
-        node._call_user_data_handler(operation, node, clone)
-    return clone
-
-
-def _nssplit(qualifiedName):
-    fields = qualifiedName.split(':', 1)
-    if len(fields) == 2:
-        return fields
-    else:
-        return (None, fields[0])
-
-
-def _get_StringIO():
-    # we can't use cStringIO since it doesn't support Unicode strings
-    from StringIO import StringIO
-    return StringIO()
-
-def _do_pulldom_parse(func, args, kwargs):
-    events = func(*args, **kwargs)
-    toktype, rootNode = events.getEvent()
-    events.expandNode(rootNode)
-    events.clear()
-    return rootNode
-
-def parse(file, parser=None, bufsize=None):
-    """Parse a file into a DOM by filename or file object."""
-    if parser is None and not bufsize:
-        from xml.dom import expatbuilder
-        return expatbuilder.parse(file)
-    else:
-        from xml.dom import pulldom
-        return _do_pulldom_parse(pulldom.parse, (file,),
-            {'parser': parser, 'bufsize': bufsize})
-
-def parseString(string, parser=None):
-    """Parse a file into a DOM from a string."""
-    if parser is None:
-        from xml.dom import expatbuilder
-        return expatbuilder.parseString(string)
-    else:
-        from xml.dom import pulldom
-        return _do_pulldom_parse(pulldom.parseString, (string,),
-                                 {'parser': parser})
-
-def getDOMImplementation(features=None):
-    if features:
-        if isinstance(features, StringTypes):
-            features = domreg._parse_feature_string(features)
-        for f, v in features:
-            if not Document.implementation.hasFeature(f, v):
-                return None
-    return Document.implementation