uTools-Manuals/docs/java/org/w3c/dom/EntityReference.html

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<h2 class="title" title="Interface EntityReference">Interface EntityReference</h2>
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         All Superinterfaces: 
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<span><a href="../../../org/w3c/dom/Node.html" title="界面在org.w3c.dom">Node</a></span>
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<hr/> <br/> <pre>public interface <span class="typeNameLabel">EntityReference</span>
extends <a href="../../../org/w3c/dom/Node.html" title="interface in org.w3c.dom">Node</a></pre>
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<span><code>EntityReference</code>节点可用于表示树中的实体引用。</span>
<span>请注意，字符引用和对预定义实体的引用被认为是由HTML或XML处理器进行扩展，以便字符由Unicode等效而不是由实体引用表示。</span>
<span>此外，XML处理器可以在构建Document时完全扩展对实体的<code>Document</code> ，而不是提供<code>EntityReference</code>节点。</span>
<span>如果它不提供这样的节点，则对于<code>EntityReference</code>节点表示为已知实体的参考<code>Entity</code>存在，并且子树<code>EntityReference</code>节点是副本<code>Entity</code>节点子树。</span>
<span>但是，当实体包含未绑定的命名空间前缀时，后者可能不正确。</span>
<span>在这种情况下，由于命名空间前缀解析取决于实体引用的位置， <code>EntityReference</code>节点的<code>EntityReference</code>可能会绑定到不同的命名空间URI。</span>
<span>当一个<code>EntityReference</code>节点表示对未知实体的引用时，节点没有子节点，例如<code>Attr.value</code>使用时，其替换值为空。</span>
<p> <span>对于<code>Entity</code>节点， <code>EntityReference</code>节点及其所有后代都是只读的。</span> </p>
<p> <span><b>注意：</b> <code>EntityReference</code>节点可能会导致元素内容和属性值归一化问题，例如在XML 1.0和XML Schema中，在实体引用扩展后执行归一化。</span> </p>
<p> <span>另见<a href="http://www.w3.org/TR/2004/REC-DOM-Level-3-Core-20040407">Document Object Model (DOM) Level 3 Core Specification</a> 。</span> </p>
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