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Xerces2 is the next generation of high performance, fully compliant XML parsers in the Apache Xerces family. This new version of Xerces introduces the Xerces Native Interface (XNI), a complete framework for building parser components and configurations that is extremely modular and easy to program. The Apache Xerces2 parser is the reference implementation of XNI but other parser components, configurations, and parsers can be written using the Xerces Native Interface. For complete design and implementation documents, refer to the XNI Manual. Xerces2 is a fully conforming XML Schema 1.0 processor. A partial experimental implementation of the XML Schema 1.1 Structures and Datatypes Working Drafts (December 2009) and an experimental implementation of the XML Schema Definition Language (XSD): Component Designators (SCD) Candidate Recommendation (January 2010) are provided for evaluation. For more information, refer to the XML Schema page. Xerces2 also provides a complete implementation of the Document Object Model Level 3 Core and Load/Save W3C Recommendations and provides a complete implementation of the XML Inclusions (XInclude) W3C Recommendation. It also provides support for OASIS XML Catalogs v1.1. Xerces2 is able to parse documents written according to the XML 1.1 Recommendation, except that it does not yet provide an option to enable normalization checking as described in section 2.13 of this specification. It also handles namespaces according to the XML Namespaces 1.1 Recommendation, and will correctly serialize XML 1.1 documents if the DOM level 3 load/save APIs are in use.

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/*
 * 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.xpath;

import org.w3c.dom.Element;
import org.w3c.dom.Node;

/**
 * The XPathNamespace interface is returned by 
 * XPathResult interfaces to represent the XPath namespace node 
 * type that DOM lacks. There is no public constructor for this node type. 
 * Attempts to place it into a hierarchy or a NamedNodeMap result in a 
 * DOMException with the code HIERARCHY_REQUEST_ERR
 * . This node is read only, so methods or setting of attributes that would 
 * mutate the node result in a DOMException with the code 
 * NO_MODIFICATION_ALLOWED_ERR.
 * The core specification describes attributes of the Node 
 * interface that are different for different node types but does not 
 * describe XPATH_NAMESPACE_NODE, so here is a description of 
 * those attributes for this node type. All attributes of Node 
 * not described in this section have a null or 
 * false value.
 * 
ownerDocument matches the ownerDocument of the 
 * ownerElement even if the element is later adopted.
 * 
nodeName is always the string "#namespace".
 * 
prefix is the prefix of the namespace represented by the 
 * node.
 * 
localName is the same as prefix.
 * 
nodeType is equal to XPATH_NAMESPACE_NODE.
 * 
namespaceURI is the namespace URI of the namespace 
 * represented by the node.
 * 
nodeValue is the same as namespaceURI.
 * 
adoptNode, cloneNode, and 
 * importNode fail on this node type by raising a 
 * DOMException with the code NOT_SUPPORTED_ERR.
 * 
Note: In future versions of the XPath specification, the 
 * definition of a namespace node may be changed incomatibly, in which case 
 * incompatible changes to field values may be required to implement 
 * versions beyond XPath 1.0.
 * See also the Document Object Model (DOM) Level 3 XPath Specification.
 */
public interface XPathNamespace extends Node {
    // XPathNodeType
    /**
     * The node is a Namespace.
     */
    public static final short XPATH_NAMESPACE_NODE      = 13;

    /**
     * The Element on which the namespace was in scope when it 
     * was requested. This does not change on a returned namespace node even 
     * if the document changes such that the namespace goes out of scope on 
     * that element and this node is no longer found there by XPath.
     */
    public Element getOwnerElement();

}