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+/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
+ * Copyright by The HDF Group. *
+ * All rights reserved. *
+ * *
+ * This file is part of HDF5. The full HDF5 copyright notice, including *
+ * terms governing use, modification, and redistribution, is contained in *
+ * the COPYING file, which can be found at the root of the source code *
+ * distribution tree, or in https://www.hdfgroup.org/licenses. *
+ * If you do not have access to either file, you may request a copy from *
+ * help@hdfgroup.org. *
+ * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
+
+/*
+ * Programmer: Quincey Koziol
+ * Saturday, September 12, 2015
+ *
+ * Purpose: This file contains declarations which define macros for the
+ * H5I package. Including this header means that the source file
+ * is part of the H5I package.
+ */
+#ifndef H5Imodule_H
+#define H5Imodule_H
+
+/* Define the proper control macros for the generic FUNC_ENTER/LEAVE and error
+ * reporting macros.
+ */
+#define H5I_MODULE
+#define H5_MY_PKG H5I
+#define H5_MY_PKG_ERR H5E_ID
+
+/** \page H5I_UG The HDF5 Identifiers
+ * @todo Under Construction
+ */
+
+/**
+ * \defgroup H5I Identifiers (H5I)
+ *
+ * Use the functions in this module to manage identifiers defined by the HDF5
+ * library. See \ref H5IUD for user-defined identifiers and identifier
+ * types.
+ *
+ * HDF5 identifiers are usually created as a side-effect of creating HDF5
+ * entities such as groups, datasets, attributes, or property lists.
+ *
+ * Identifiers defined by the HDF5 library can be used to retrieve information
+ * such as path names and reference counts, and their validity can be checked.
+ *
+ * Identifiers can be updated by manipulating their reference counts.
+ *
+ * Unused identifiers should be reclaimed by closing the associated item, e.g.,
+ * HDF5 object, or decrementing the reference count to 0.
+ *
+ * \note Identifiers (of type \ref hid_t) are run-time auxiliaries and
+ * not persisted in the file.
+ *
+ * <table>
+ * <tr><th>Create</th><th>Read</th></tr>
+ * <tr valign="top">
+ * <td>
+ * \snippet{lineno} H5I_examples.c create
+ * </td>
+ * <td>
+ * \snippet{lineno} H5I_examples.c read
+ * </td>
+ * <tr><th>Update</th><th>Delete</th></tr>
+ * <tr valign="top">
+ * <td>
+ * \snippet{lineno} H5I_examples.c update
+ * </td>
+ * <td>
+ * \snippet{lineno} H5I_examples.c delete
+ * </td>
+ * </tr>
+ * </table>
+ *
+ * \defgroup H5IUD User-defined ID Types
+ * \ingroup H5I
+ *
+ * The \ref H5I module contains functions to define new identifier types.
+ * For convenience, handles of type \ref hid_t can then be associated with the
+ * new identifier types and user objects.
+ *
+ * New identifier types can be created by registering a new identifier type
+ * with the HDF5 library. Once a new identifier type has bee registered,
+ * it can be used to generate identifiers for user objects.
+ *
+ * User-defined identifier types can be searched and iterated.
+ *
+ * Like library-defined identifiers, user-defined identifiers \Emph{and}
+ * identifier types are reference counted, and the reference counts can be
+ * manipulated accordingly.
+ *
+ * User-defined identifiers no longer in use should be deleted or reclaimed,
+ * and identifier types should be destroyed if they are no longer required.
+ *
+ * <table>
+ * <tr><th>Create</th><th>Read</th></tr>
+ * <tr valign="top">
+ * <td>
+ * \snippet{lineno} H5I_examples.c create_ud
+ * </td>
+ * <td>
+ * \snippet{lineno} H5I_examples.c read_ud
+ * </td>
+ * <tr><th>Update</th><th>Delete</th></tr>
+ * <tr valign="top">
+ * <td>
+ * \snippet{lineno} H5I_examples.c update_ud
+ * </td>
+ * <td>
+ * \snippet{lineno} H5I_examples.c delete_ud
+ * </td>
+ * </tr>
+ * </table>
+ *
+ */
+
+#endif /* H5Imodule_H */