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copied!<p>The numeric character references <code>"&#60;"</code> and <code>"&#38;"</code> may be used to escape <strong><</strong> and <strong>&</strong> when they occur in character data.<br/> All <code>XML</code> processors MUST recognize these entities whether they are declared or not. For <a href="http://www.w3.org/TR/2008/REC-xml-20081126/#dt-compat" rel="nofollow">interoperability</a>, valid XML documents SHOULD declare these entities, like any others, before using them. If the entities <code>lt</code> or <code>amp</code> are declared, they MUST be declared as <code>internal entities</code> whose replacement text is a <strong><a href="http://www.w3.org/TR/2008/REC-xml-20081126/#sec-predefined-ent" rel="nofollow">character reference</a></strong> to the respective character (less-than sign or ampersand) <em>being escaped;</em> the double escaping is <code>REQUIRED</code> for these entities so that references to them produce a well-formed result. If the entities <code>gt</code>, <code>apos</code>, or <code>quot</code> are declared, they <em>MUST</em> be declared as <code>internal entities</code> whose replacement text is the single character being escaped (or a character reference to that character; the double escaping here is OPTIONAL but harmless). For example:</p> <pre><code><!ENTITY lt "&#38;#60;"> <!ENTITY gt "&#62;"> <!ENTITY amp "&#38;#38;"> <!ENTITY apos "&#39;"> <!ENTITY quot "&#34;"> </code></pre>

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