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qtbase5-doc-5.9.4-1.1.mga6.noarch.rpm

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  <title>Working with the DOM Tree | Qt XML 5.9</title>
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<td >Qt 5.9</td><td ><a href="qtxml-index.html">Qt XML</a></td><td >Working with the DOM Tree</td></tr></table><table class="buildversion"><tr>
<td id="buildversion" width="100%" align="right">Qt 5.9.4 Reference Documentation</td>
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<h3><a name="toc">Contents</a></h3>
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<li class="level1"><a href="#introduction-to-dom">Introduction to DOM</a></li>
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<h1 class="title">Working with the DOM Tree</h1>
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<div class="descr"> <a name="details"></a>
<a name="dom"></a><p>DOM Level 2 is a W3C Recommendation for XML interfaces that maps the constituents of an XML document to a tree structure. The specification of DOM Level 2 can be found at <a href="http://www.w3.org/DOM/">http://www.w3.org/DOM/</a>.</p>
<a name="domintro"></a><a name="introduction-to-dom"></a>
<h2 id="introduction-to-dom">Introduction to DOM</h2>
<p>DOM provides an interface to access and change the content and structure of an XML file. It makes a hierarchical view of the document (a tree view). Thus -- in contrast to the SAX2 interface -- an object model of the document is resident in memory after parsing which makes manipulation easy.</p>
<p>All DOM nodes in the document tree are subclasses of <a href="qdomnode.html">QDomNode</a>. The document itself is represented as a <a href="qdomdocument.html">QDomDocument</a> object.</p>
<p>Here are the available node classes and their potential child classes:</p>
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<li><a href="qdomdocument.html">QDomDocument</a>: Possible children are<ul>
<li><a href="qdomelement.html">QDomElement</a> (at most one)</li>
<li><a href="qdomprocessinginstruction.html">QDomProcessingInstruction</a></li>
<li><a href="qdomcomment.html">QDomComment</a></li>
<li><a href="qdomdocumenttype.html">QDomDocumentType</a></li>
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<li><a href="qdomdocumentfragment.html">QDomDocumentFragment</a>: Possible children are<ul>
<li><a href="qdomelement.html">QDomElement</a></li>
<li><a href="qdomprocessinginstruction.html">QDomProcessingInstruction</a></li>
<li><a href="qdomcomment.html">QDomComment</a></li>
<li><a href="qdomtext.html">QDomText</a></li>
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<li><a href="qdomcdatasection.html">QDomCDATASection</a></li>
<li><a href="qdomentityreference.html">QDomEntityReference</a></li>
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<li><a href="qdomelement.html">QDomElement</a>: Possible children are<ul>
<li><a href="qdomelement.html">QDomElement</a></li>
<li><a href="qdomtext.html">QDomText</a></li>
<li><a href="qdomcomment.html">QDomComment</a></li>
<li><a href="qdomprocessinginstruction.html">QDomProcessingInstruction</a></li>
<li><a href="qdomcdatasection.html">QDomCDATASection</a></li>
<li><a href="qdomentityreference.html">QDomEntityReference</a></li>
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<li><a href="qdomattr.html">QDomAttr</a>: Possible children are<ul>
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<li><a href="qdomentityreference.html">QDomEntityReference</a></li>
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<li><a href="qdomcdatasection.html">QDomCDATASection</a>: No children</li>
<li><a href="qdomentity.html">QDomEntity</a>: Possible children are<ul>
<li><a href="qdomelement.html">QDomElement</a></li>
<li><a href="qdomprocessinginstruction.html">QDomProcessingInstruction</a></li>
<li><a href="qdomcomment.html">QDomComment</a></li>
<li><a href="qdomtext.html">QDomText</a></li>
<li><a href="qdomcdatasection.html">QDomCDATASection</a></li>
<li><a href="qdomentityreference.html">QDomEntityReference</a></li>
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<li><a href="qdomnotation.html">QDomNotation</a>: No children</li>
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<p>With <a href="qdomnodelist.html">QDomNodeList</a> and <a href="qdomnamednodemap.html">QDomNamedNodeMap</a> two collection classes are provided: <a href="qdomnodelist.html">QDomNodeList</a> is a list of nodes, and <a href="qdomnamednodemap.html">QDomNamedNodeMap</a> is used to handle unordered sets of nodes (often used for attributes).</p>
<p>The <a href="qdomimplementation.html">QDomImplementation</a> class allows the user to query features of the DOM implementation.</p>
<p>To get started please refer to the <a href="qdomdocument.html">QDomDocument</a> documentation. You might also want to take a look at the <a href="qtxml-dombookmarks-example.html">DOM Bookmarks example</a>, which illustrates how to read and write an XML bookmark file (XBEL) using DOM.</p>
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