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<?xml version="1.0" encoding="UTF-8"?>
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  <title>Qt 4.8: XML Processing</title>
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    <a href="index.html" class="qtref"><span>Qt Reference Documentation</span></a>
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<li>XML Processing</li>
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<h3><a name="toc">Contents</a></h3>
<ul>
<li class="level1"><a href="#topics">Topics:</a></li>
<li class="level1"><a href="#classes-for-xml-processing">Classes for XML Processing</a></li>
</ul>
</div>
<h1 class="title">XML Processing</h1>
<span class="subtitle"></span>
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<div class="descr"> <a name="details"></a>
<p>In addition to core XML support, classes for higher level querying and manipulation of XML data are provided by the <a href="qtxmlpatterns.html">QtXmlPatterns</a> module. In the <a href="qtsvg.html">QtSvg</a> module, the <a href="qsvgrenderer.html">QSvgRenderer</a> and <a href="qsvggenerator.html">QSvgGenerator</a> classes can read and write a subset of SVG, an XML-based file format. Qt also provides helper functions that may be useful to those working with XML and XHTML: see <a href="qt.html#escape">Qt::escape</a>() and <a href="qt.html#convertFromPlainText">Qt::convertFromPlainText</a>().</p>
<a name="topics"></a>
<h2>Topics:</h2>
<ul>
<li><a href="#classes-for-xml-processing">Classes for XML Processing</a></li>
<li><a href="xml-namespaces.html">An Introduction to Namespaces</a></li>
<li><a href="xml-streaming.html">XML Streaming</a></li>
<li><a href="xml-sax.html">The SAX Interface</a></li>
<li><a href="xml-dom-tml.html">Working with the DOM Tree</a></li>
<li><a href="xmlprocessing.html">XQuery/XPath and XML Schema</a><ul>
<li><a href="xquery-introduction.html">A Short Path to XQuery</a></li>
</ul>
</li>
</ul>
<a name="classes-for-xml-processing"></a>
<h2>Classes for XML Processing</h2>
<p>These classes are relevant to XML users.</p>
<table class="annotated">
<tr class="odd topAlign"><td class="tblName"><p><a href="qabstractmessagehandler.html">QAbstractMessageHandler</a></p></td><td class="tblDescr"><p>Callback interface for handling messages</p></td></tr>
<tr class="even topAlign"><td class="tblName"><p><a href="qabstracturiresolver.html">QAbstractUriResolver</a></p></td><td class="tblDescr"><p>Callback interface for resolving Uniform Resource Identifiers</p></td></tr>
<tr class="odd topAlign"><td class="tblName"><p><a href="qabstractxmlnodemodel.html">QAbstractXmlNodeModel</a></p></td><td class="tblDescr"><p>Abstract base class for modeling non-XML data to look like XML for QXmlQuery</p></td></tr>
<tr class="even topAlign"><td class="tblName"><p><a href="qabstractxmlreceiver.html">QAbstractXmlReceiver</a></p></td><td class="tblDescr"><p>Callback interface for transforming the output of a QXmlQuery</p></td></tr>
<tr class="odd topAlign"><td class="tblName"><p><a href="qdomattr.html">QDomAttr</a></p></td><td class="tblDescr"><p>Represents one attribute of a QDomElement</p></td></tr>
<tr class="even topAlign"><td class="tblName"><p><a href="qdomcdatasection.html">QDomCDATASection</a></p></td><td class="tblDescr"><p>Represents an XML CDATA section</p></td></tr>
<tr class="odd topAlign"><td class="tblName"><p><a href="qdomcharacterdata.html">QDomCharacterData</a></p></td><td class="tblDescr"><p>Represents a generic string in the DOM</p></td></tr>
<tr class="even topAlign"><td class="tblName"><p><a href="qdomcomment.html">QDomComment</a></p></td><td class="tblDescr"><p>Represents an XML comment</p></td></tr>
<tr class="odd topAlign"><td class="tblName"><p><a href="qdomdocument.html">QDomDocument</a></p></td><td class="tblDescr"><p>Represents an XML document</p></td></tr>
<tr class="even topAlign"><td class="tblName"><p><a href="qdomdocumentfragment.html">QDomDocumentFragment</a></p></td><td class="tblDescr"><p>Tree of QDomNodes which is not usually a complete QDomDocument</p></td></tr>
<tr class="odd topAlign"><td class="tblName"><p><a href="qdomdocumenttype.html">QDomDocumentType</a></p></td><td class="tblDescr"><p>The representation of the DTD in the document tree</p></td></tr>
<tr class="even topAlign"><td class="tblName"><p><a href="qdomelement.html">QDomElement</a></p></td><td class="tblDescr"><p>Represents one element in the DOM tree</p></td></tr>
<tr class="odd topAlign"><td class="tblName"><p><a href="qdomentity.html">QDomEntity</a></p></td><td class="tblDescr"><p>Represents an XML entity</p></td></tr>
<tr class="even topAlign"><td class="tblName"><p><a href="qdomentityreference.html">QDomEntityReference</a></p></td><td class="tblDescr"><p>Represents an XML entity reference</p></td></tr>
<tr class="odd topAlign"><td class="tblName"><p><a href="qdomimplementation.html">QDomImplementation</a></p></td><td class="tblDescr"><p>Information about the features of the DOM implementation</p></td></tr>
<tr class="even topAlign"><td class="tblName"><p><a href="qdomnamednodemap.html">QDomNamedNodeMap</a></p></td><td class="tblDescr"><p>Contains a collection of nodes that can be accessed by name</p></td></tr>
<tr class="odd topAlign"><td class="tblName"><p><a href="qdomnode.html">QDomNode</a></p></td><td class="tblDescr"><p>The base class for all the nodes in a DOM tree</p></td></tr>
<tr class="even topAlign"><td class="tblName"><p><a href="qdomnodelist.html">QDomNodeList</a></p></td><td class="tblDescr"><p>List of QDomNode objects</p></td></tr>
<tr class="odd topAlign"><td class="tblName"><p><a href="qdomnotation.html">QDomNotation</a></p></td><td class="tblDescr"><p>Represents an XML notation</p></td></tr>
<tr class="even topAlign"><td class="tblName"><p><a href="qdomprocessinginstruction.html">QDomProcessingInstruction</a></p></td><td class="tblDescr"><p>Represents an XML processing instruction</p></td></tr>
<tr class="odd topAlign"><td class="tblName"><p><a href="qdomtext.html">QDomText</a></p></td><td class="tblDescr"><p>Represents text data in the parsed XML document</p></td></tr>
<tr class="even topAlign"><td class="tblName"><p><a href="qsimplexmlnodemodel.html">QSimpleXmlNodeModel</a></p></td><td class="tblDescr"><p>Implementation of QAbstractXmlNodeModel sufficient for many common cases</p></td></tr>
<tr class="odd topAlign"><td class="tblName"><p><a href="qsourcelocation.html">QSourceLocation</a></p></td><td class="tblDescr"><p>Identifies a location in a resource by URI, line, and column</p></td></tr>
<tr class="even topAlign"><td class="tblName"><p><a href="qxmlattributes.html">QXmlAttributes</a></p></td><td class="tblDescr"><p>XML attributes</p></td></tr>
<tr class="odd topAlign"><td class="tblName"><p><a href="qxmlcontenthandler.html">QXmlContentHandler</a></p></td><td class="tblDescr"><p>Interface to report the logical content of XML data</p></td></tr>
<tr class="even topAlign"><td class="tblName"><p><a href="qxmldtdhandler.html">QXmlDTDHandler</a></p></td><td class="tblDescr"><p>Interface to report DTD content of XML data</p></td></tr>
<tr class="odd topAlign"><td class="tblName"><p><a href="qxmldeclhandler.html">QXmlDeclHandler</a></p></td><td class="tblDescr"><p>Interface to report declaration content of XML data</p></td></tr>
<tr class="even topAlign"><td class="tblName"><p><a href="qxmldefaulthandler.html">QXmlDefaultHandler</a></p></td><td class="tblDescr"><p>Default implementation of all the XML handler classes</p></td></tr>
<tr class="odd topAlign"><td class="tblName"><p><a href="qxmlentityresolver.html">QXmlEntityResolver</a></p></td><td class="tblDescr"><p>Interface to resolve external entities contained in XML data</p></td></tr>
<tr class="even topAlign"><td class="tblName"><p><a href="qxmlerrorhandler.html">QXmlErrorHandler</a></p></td><td class="tblDescr"><p>Interface to report errors in XML data</p></td></tr>
<tr class="odd topAlign"><td class="tblName"><p><a href="qxmlformatter.html">QXmlFormatter</a></p></td><td class="tblDescr"><p>Implementation of QXmlSerializer for transforming XQuery output into formatted XML</p></td></tr>
<tr class="even topAlign"><td class="tblName"><p><a href="qxmlinputsource.html">QXmlInputSource</a></p></td><td class="tblDescr"><p>The input data for the QXmlReader subclasses</p></td></tr>
<tr class="odd topAlign"><td class="tblName"><p><a href="qxmlitem.html">QXmlItem</a></p></td><td class="tblDescr"><p>Contains either an XML node or an atomic value</p></td></tr>
<tr class="even topAlign"><td class="tblName"><p><a href="qxmllexicalhandler.html">QXmlLexicalHandler</a></p></td><td class="tblDescr"><p>Interface to report the lexical content of XML data</p></td></tr>
<tr class="odd topAlign"><td class="tblName"><p><a href="qxmllocator.html">QXmlLocator</a></p></td><td class="tblDescr"><p>The XML handler classes with information about the parsing position within a file</p></td></tr>
<tr class="even topAlign"><td class="tblName"><p><a href="qxmlname.html">QXmlName</a></p></td><td class="tblDescr"><p>Represents the name of an XML node, in an efficient, namespace-aware way</p></td></tr>
<tr class="odd topAlign"><td class="tblName"><p><a href="qxmlnamepool.html">QXmlNamePool</a></p></td><td class="tblDescr"><p>Table of shared strings referenced by instances of QXmlName</p></td></tr>
<tr class="even topAlign"><td class="tblName"><p><a href="qxmlnamespacesupport.html">QXmlNamespaceSupport</a></p></td><td class="tblDescr"><p>Helper class for XML readers which want to include namespace support</p></td></tr>
<tr class="odd topAlign"><td class="tblName"><p><a href="qxmlnodemodelindex.html">QXmlNodeModelIndex</a></p></td><td class="tblDescr"><p>Identifies a node in an XML node model subclassed from QAbstractXmlNodeModel</p></td></tr>
<tr class="even topAlign"><td class="tblName"><p><a href="qxmlparseexception.html">QXmlParseException</a></p></td><td class="tblDescr"><p>Used to report errors with the QXmlErrorHandler interface</p></td></tr>
<tr class="odd topAlign"><td class="tblName"><p><a href="qxmlquery.html">QXmlQuery</a></p></td><td class="tblDescr"><p>Performs XQueries on XML data, or on non-XML data modeled to look like XML</p></td></tr>
<tr class="even topAlign"><td class="tblName"><p><a href="qxmlreader.html">QXmlReader</a></p></td><td class="tblDescr"><p>Interface for XML readers (i.e&#x2e; parsers)</p></td></tr>
<tr class="odd topAlign"><td class="tblName"><p><a href="qxmlresultitems.html">QXmlResultItems</a></p></td><td class="tblDescr"><p>Iterates through the results of evaluating an XQuery in QXmlQuery</p></td></tr>
<tr class="even topAlign"><td class="tblName"><p><a href="qxmlschema.html">QXmlSchema</a></p></td><td class="tblDescr"><p>Loading and validation of a W3C XML Schema</p></td></tr>
<tr class="odd topAlign"><td class="tblName"><p><a href="qxmlschemavalidator.html">QXmlSchemaValidator</a></p></td><td class="tblDescr"><p>Validates XML instance documents against a W3C XML Schema</p></td></tr>
<tr class="even topAlign"><td class="tblName"><p><a href="qxmlserializer.html">QXmlSerializer</a></p></td><td class="tblDescr"><p>Implementation of QAbstractXmlReceiver for transforming XQuery output into unformatted XML</p></td></tr>
<tr class="odd topAlign"><td class="tblName"><p><a href="qxmlsimplereader.html">QXmlSimpleReader</a></p></td><td class="tblDescr"><p>Implementation of a simple XML parser</p></td></tr>
<tr class="even topAlign"><td class="tblName"><p><a href="qxmlstreamattribute.html">QXmlStreamAttribute</a></p></td><td class="tblDescr"><p>Represents a single XML attribute</p></td></tr>
<tr class="odd topAlign"><td class="tblName"><p><a href="qxmlstreamattributes.html">QXmlStreamAttributes</a></p></td><td class="tblDescr"><p>Represents a vector of QXmlStreamAttribute</p></td></tr>
<tr class="even topAlign"><td class="tblName"><p><a href="qxmlstreamentitydeclaration.html">QXmlStreamEntityDeclaration</a></p></td><td class="tblDescr"><p>Represents a DTD entity declaration</p></td></tr>
<tr class="odd topAlign"><td class="tblName"><p><a href="qxmlstreamentityresolver.html">QXmlStreamEntityResolver</a></p></td><td class="tblDescr"><p>Entity resolver for a QXmlStreamReader</p></td></tr>
<tr class="even topAlign"><td class="tblName"><p><a href="qxmlstreamnamespacedeclaration.html">QXmlStreamNamespaceDeclaration</a></p></td><td class="tblDescr"><p>Represents a namespace declaration</p></td></tr>
<tr class="odd topAlign"><td class="tblName"><p><a href="qxmlstreamnotationdeclaration.html">QXmlStreamNotationDeclaration</a></p></td><td class="tblDescr"><p>Represents a DTD notation declaration</p></td></tr>
<tr class="even topAlign"><td class="tblName"><p><a href="qxmlstreamreader.html">QXmlStreamReader</a></p></td><td class="tblDescr"><p>Fast parser for reading well-formed XML via a simple streaming API</p></td></tr>
<tr class="odd topAlign"><td class="tblName"><p><a href="qxmlstreamwriter.html">QXmlStreamWriter</a></p></td><td class="tblDescr"><p>XML writer with a simple streaming API</p></td></tr>
</table>
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