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    1   /*
    2    * Copyright (c) 2004 World Wide Web Consortium,
    3    *
    4    * (Massachusetts Institute of Technology, European Research Consortium for
    5    * Informatics and Mathematics, Keio University). All Rights Reserved. This
    6    * work is distributed under the W3C(r) Software License [1] in the hope that
    7    * it will be useful, but WITHOUT ANY WARRANTY; without even the implied
    8    * warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
    9    *
   10    * [1] http://www.w3.org/Consortium/Legal/2002/copyright-software-20021231
   11    */
   12   
   13   package org.w3c.dom;
   14   
   15   /**
   16    * <code>EntityReference</code> nodes may be used to represent an entity 
   17    * reference in the tree. Note that character references and references to 
   18    * predefined entities are considered to be expanded by the HTML or XML 
   19    * processor so that characters are represented by their Unicode equivalent 
   20    * rather than by an entity reference. Moreover, the XML processor may 
   21    * completely expand references to entities while building the 
   22    * <code>Document</code>, instead of providing <code>EntityReference</code> 
   23    * nodes. If it does provide such nodes, then for an 
   24    * <code>EntityReference</code> node that represents a reference to a known 
   25    * entity an <code>Entity</code> exists, and the subtree of the 
   26    * <code>EntityReference</code> node is a copy of the <code>Entity</code> 
   27    * node subtree. However, the latter may not be true when an entity contains 
   28    * an unbound namespace prefix. In such a case, because the namespace prefix 
   29    * resolution depends on where the entity reference is, the descendants of 
   30    * the <code>EntityReference</code> node may be bound to different namespace 
   31    * URIs. When an <code>EntityReference</code> node represents a reference to 
   32    * an unknown entity, the node has no children and its replacement value, 
   33    * when used by <code>Attr.value</code> for example, is empty.
   34    * <p>As for <code>Entity</code> nodes, <code>EntityReference</code> nodes and 
   35    * all their descendants are readonly.
   36    * <p ><b>Note:</b> <code>EntityReference</code> nodes may cause element 
   37    * content and attribute value normalization problems when, such as in XML 
   38    * 1.0 and XML Schema, the normalization is performed after entity reference 
   39    * are expanded.
   40    * <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>.
   41    */
   42   public interface EntityReference extends Node {
   43   }

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