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/*

 * This file is available under and governed by the GNU General Public

 * License version 2 only, as published by the Free Software Foundation.

 * However, the following notice accompanied the original version of this

 * file and, per its terms, should not be removed:

 *

 * Copyright (c) 2002 World Wide Web Consortium,

 * (Massachusetts Institute of Technology, Institut National de

 * Recherche en Informatique et en Automatique, Keio University). All

 * Rights Reserved. This program is distributed under the W3C's Software

 * Intellectual Property License. This program is distributed 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.

 * See W3C License http://www.w3.org/Consortium/Legal/ for more details.

 */

package org.w3c.dom.xpath;

import org.w3c.dom.Element;

import org.w3c.dom.Node;

/**

 * The <code>XPathNamespace</code> interface is returned by

 * <code>XPathResult</code> 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

 * <code>DOMException</code> with the code <code>HIERARCHY_REQUEST_ERR</code>

 * . This node is read only, so methods or setting of attributes that would

 * mutate the node result in a DOMException with the code

 * <code>NO_MODIFICATION_ALLOWED_ERR</code>.

 * <p>The core specification describes attributes of the <code>Node</code>

 * interface that are different for different node node types but does not

 * describe <code>XPATH_NAMESPACE_NODE</code>, so here is a description of

 * those attributes for this node type. All attributes of <code>Node</code>

 * not described in this section have a <code>null</code> or

 * <code>false</code> value.

 * <p><code>ownerDocument</code> matches the <code>ownerDocument</code> of the

 * <code>ownerElement</code> even if the element is later adopted.

 * <p><code>prefix</code> is the prefix of the namespace represented by the

 * node.

 * <p><code>nodeName</code> is the same as <code>prefix</code>.

 * <p><code>nodeType</code> is equal to <code>XPATH_NAMESPACE_NODE</code>.

 * <p><code>namespaceURI</code> is the namespace URI of the namespace

 * represented by the node.

 * <p><code>adoptNode</code>, <code>cloneNode</code>, and

 * <code>importNode</code> fail on this node type by raising a

 * <code>DOMException</code> with the code <code>NOT_SUPPORTED_ERR</code>.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.

 * <p>See also the <a href='http://www.w3.org/2002/08/WD-DOM-Level-3-XPath-20020820'>Document Object Model (DOM) Level 3 XPath Specification</a>.

 */

public interface XPathNamespace extends Node {

    // XPathNodeType

    /**

     * The node is a <code>Namespace</code>.

     */

    public static final short XPATH_NAMESPACE_NODE      = 13;

    /**

     * The <code>Element</code> 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();

}