--- /dev/null
+/*
+ * Copyright (c) 2004 World Wide Web Consortium,
+ *
+ * (Massachusetts Institute of Technology, European Research Consortium for
+ * Informatics and Mathematics, Keio University). All Rights Reserved. This
+ * work is distributed under the W3C(r) Software License [1] in the hope that
+ * it will be useful, but WITHOUT ANY WARRANTY; without even the implied
+ * warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+ *
+ * [1] http://www.w3.org/Consortium/Legal/2002/copyright-software-20021231
+ */
+
+package org.w3c.dom;
+
+/**
+ * The <code>TypeInfo</code> interface represents a type referenced from
+ * <code>Element</code> or <code>Attr</code> nodes, specified in the schemas
+ * associated with the document. The type is a pair of a namespace URI and
+ * name properties, and depends on the document's schema.
+ * <p> If the document's schema is an XML DTD [<a href='http://www.w3.org/TR/2004/REC-xml-20040204'>XML 1.0</a>], the values
+ * are computed as follows:
+ * <ul>
+ * <li> If this type is referenced from an
+ * <code>Attr</code> node, <code>typeNamespace</code> is
+ * <code>"http://www.w3.org/TR/REC-xml"</code> and <code>typeName</code>
+ * represents the <b>[attribute type]</b> property in the [<a href='http://www.w3.org/TR/2004/REC-xml-infoset-20040204/'>XML Information Set</a>]
+ * . If there is no declaration for the attribute, <code>typeNamespace</code>
+ * and <code>typeName</code> are <code>null</code>.
+ * </li>
+ * <li> If this type is
+ * referenced from an <code>Element</code> node, <code>typeNamespace</code>
+ * and <code>typeName</code> are <code>null</code>.
+ * </li>
+ * </ul>
+ * <p> If the document's schema is an XML Schema [<a href='http://www.w3.org/TR/2001/REC-xmlschema-1-20010502/'>XML Schema Part 1</a>]
+ * , the values are computed as follows using the post-schema-validation
+ * infoset contributions (also called PSVI contributions):
+ * <ul>
+ * <li> If the <b>[validity]</b> property exists AND is <em>"invalid"</em> or <em>"notKnown"</em>: the {target namespace} and {name} properties of the declared type if
+ * available, otherwise <code>null</code>.
+ * <p ><b>Note:</b> At the time of writing, the XML Schema specification does
+ * not require exposing the declared type. Thus, DOM implementations might
+ * choose not to provide type information if validity is not valid.
+ * </li>
+ * <li> If the <b>[validity]</b> property exists and is <em>"valid"</em>:
+ * <ol>
+ * <li> If <b>[member type definition]</b> exists:
+ * <ol>
+ * <li>If {name} is not absent, then expose {name} and {target
+ * namespace} properties of the <b>[member type definition]</b> property;
+ * </li>
+ * <li>Otherwise, expose the namespace and local name of the
+ * corresponding anonymous type name.
+ * </li>
+ * </ol>
+ * </li>
+ * <li> If the <b>[type definition]</b> property exists:
+ * <ol>
+ * <li>If {name} is not absent, then expose {name} and {target
+ * namespace} properties of the <b>[type definition]</b> property;
+ * </li>
+ * <li>Otherwise, expose the namespace and local name of the
+ * corresponding anonymous type name.
+ * </li>
+ * </ol>
+ * </li>
+ * <li> If the <b>[member type definition anonymous]</b> exists:
+ * <ol>
+ * <li>If it is false, then expose <b>[member type definition name]</b> and <b>[member type definition namespace]</b> properties;
+ * </li>
+ * <li>Otherwise, expose the namespace and local name of the
+ * corresponding anonymous type name.
+ * </li>
+ * </ol>
+ * </li>
+ * <li> If the <b>[type definition anonymous]</b> exists:
+ * <ol>
+ * <li>If it is false, then expose <b>[type definition name]</b> and <b>[type definition namespace]</b> properties;
+ * </li>
+ * <li>Otherwise, expose the namespace and local name of the
+ * corresponding anonymous type name.
+ * </li>
+ * </ol>
+ * </li>
+ * </ol>
+ * </li>
+ * </ul>
+ * <p ><b>Note:</b> Other schema languages are outside the scope of the W3C
+ * and therefore should define how to represent their type systems using
+ * <code>TypeInfo</code>.
+ * <p>See also the <a href='http://www.w3.org/TR/2004/REC-DOM-Level-3-Core-20040407'>Document Object Model (DOM) Level 3 Core Specification</a>.
+ * @since DOM Level 3
+ */
+public interface TypeInfo {
+ /**
+ * The name of a type declared for the associated element or attribute,
+ * or <code>null</code> if unknown.
+ */
+ public String getTypeName();
+
+ /**
+ * The namespace of the type declared for the associated element or
+ * attribute or <code>null</code> if the element does not have
+ * declaration or if no namespace information is available.
+ */
+ public String getTypeNamespace();
+
+ // DerivationMethods
+ /**
+ * If the document's schema is an XML Schema [<a href='http://www.w3.org/TR/2001/REC-xmlschema-1-20010502/'>XML Schema Part 1</a>]
+ * , this constant represents the derivation by <a href='http://www.w3.org/TR/2001/REC-xmlschema-1-20010502/#key-typeRestriction'>
+ * restriction</a> if complex types are involved, or a <a href='http://www.w3.org/TR/2001/REC-xmlschema-1-20010502/#element-restriction'>
+ * restriction</a> if simple types are involved.
+ * <br> The reference type definition is derived by restriction from the
+ * other type definition if the other type definition is the same as the
+ * reference type definition, or if the other type definition can be
+ * reached recursively following the {base type definition} property
+ * from the reference type definition, and all the <em>derivation methods</em> involved are restriction.
+ */
+ public static final int DERIVATION_RESTRICTION = 0x00000001;
+ /**
+ * If the document's schema is an XML Schema [<a href='http://www.w3.org/TR/2001/REC-xmlschema-1-20010502/'>XML Schema Part 1</a>]
+ * , this constant represents the derivation by <a href='http://www.w3.org/TR/2001/REC-xmlschema-1-20010502/#key-typeExtension'>
+ * extension</a>.
+ * <br> The reference type definition is derived by extension from the
+ * other type definition if the other type definition can be reached
+ * recursively following the {base type definition} property from the
+ * reference type definition, and at least one of the <em>derivation methods</em> involved is an extension.
+ */
+ public static final int DERIVATION_EXTENSION = 0x00000002;
+ /**
+ * If the document's schema is an XML Schema [<a href='http://www.w3.org/TR/2001/REC-xmlschema-1-20010502/'>XML Schema Part 1</a>]
+ * , this constant represents the <a href='http://www.w3.org/TR/2001/REC-xmlschema-1-20010502/#element-union'>
+ * union</a> if simple types are involved.
+ * <br> The reference type definition is derived by union from the other
+ * type definition if there exists two type definitions T1 and T2 such
+ * as the reference type definition is derived from T1 by
+ * <code>DERIVATION_RESTRICTION</code> or
+ * <code>DERIVATION_EXTENSION</code>, T2 is derived from the other type
+ * definition by <code>DERIVATION_RESTRICTION</code>, T1 has {variety} <em>union</em>, and one of the {member type definitions} is T2. Note that T1 could be
+ * the same as the reference type definition, and T2 could be the same
+ * as the other type definition.
+ */
+ public static final int DERIVATION_UNION = 0x00000004;
+ /**
+ * If the document's schema is an XML Schema [<a href='http://www.w3.org/TR/2001/REC-xmlschema-1-20010502/'>XML Schema Part 1</a>]
+ * , this constant represents the <a href='http://www.w3.org/TR/2001/REC-xmlschema-1-20010502/#element-list'>list</a>.
+ * <br> The reference type definition is derived by list from the other
+ * type definition if there exists two type definitions T1 and T2 such
+ * as the reference type definition is derived from T1 by
+ * <code>DERIVATION_RESTRICTION</code> or
+ * <code>DERIVATION_EXTENSION</code>, T2 is derived from the other type
+ * definition by <code>DERIVATION_RESTRICTION</code>, T1 has {variety} <em>list</em>, and T2 is the {item type definition}. Note that T1 could be the same as
+ * the reference type definition, and T2 could be the same as the other
+ * type definition.
+ */
+ public static final int DERIVATION_LIST = 0x00000008;
+
+ /**
+ * This method returns if there is a derivation between the reference
+ * type definition, i.e. the <code>TypeInfo</code> on which the method
+ * is being called, and the other type definition, i.e. the one passed
+ * as parameters.
+ * @param typeNamespaceArg the namespace of the other type definition.
+ * @param typeNameArg the name of the other type definition.
+ * @param derivationMethod the type of derivation and conditions applied
+ * between two types, as described in the list of constants provided
+ * in this interface.
+ * @return If the document's schema is a DTD or no schema is associated
+ * with the document, this method will always return <code>false</code>
+ * . If the document's schema is an XML Schema, the method will
+ * <code>true</code> if the reference type definition is derived from
+ * the other type definition according to the derivation parameter. If
+ * the value of the parameter is <code>0</code> (no bit is set to
+ * <code>1</code> for the <code>derivationMethod</code> parameter),
+ * the method will return <code>true</code> if the other type
+ * definition can be reached by recursing any combination of {base
+ * type definition}, {item type definition}, or {member type
+ * definitions} from the reference type definition.
+ */
+ public boolean isDerivedFrom(String typeNamespaceArg,
+ String typeNameArg,
+ int derivationMethod);
+
+}
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