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<h1 class="title">QDomImplementation Class Reference</h1>
<!-- $$$QDomImplementation-brief -->
<p>The QDomImplementation class provides information about the features of the DOM implementation. <a href="#details">More...</a></p>
<!-- @@@QDomImplementation -->
<pre class="cpp"> <span class="preprocessor">#include <QDomImplementation></span></pre><p><b>Note:</b> All functions in this class are <a href="threads-reentrancy.html#reentrant">reentrant</a>, except for <a href="qdomimplementation.html#invalidDataPolicy">invalidDataPolicy</a>() and <a href="qdomimplementation.html#setInvalidDataPolicy">setInvalidDataPolicy</a>(), which are nonreentrant.</p>
<ul>
<li><a href="qdomimplementation-members.html">List of all members, including inherited members</a></li>
</ul>
<a name="public-types"></a>
<h2>Public Types</h2>
<table class="alignedsummary">
<tr><td class="memItemLeft rightAlign topAlign"> enum </td><td class="memItemRight bottomAlign"><b><a href="qdomimplementation.html#InvalidDataPolicy-enum">InvalidDataPolicy</a></b> { AcceptInvalidChars, DropInvalidChars, ReturnNullNode }</td></tr>
</table>
<a name="public-functions"></a>
<h2>Public Functions</h2>
<table class="alignedsummary">
<tr><td class="memItemLeft rightAlign topAlign"> </td><td class="memItemRight bottomAlign"><b><a href="qdomimplementation.html#QDomImplementation">QDomImplementation</a></b> ()</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> </td><td class="memItemRight bottomAlign"><b><a href="qdomimplementation.html#QDomImplementation-2">QDomImplementation</a></b> ( const QDomImplementation & <i>x</i> )</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> </td><td class="memItemRight bottomAlign"><b><a href="qdomimplementation.html#dtor.QDomImplementation">~QDomImplementation</a></b> ()</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> QDomDocument </td><td class="memItemRight bottomAlign"><b><a href="qdomimplementation.html#createDocument">createDocument</a></b> ( const QString & <i>nsURI</i>, const QString & <i>qName</i>, const QDomDocumentType & <i>doctype</i> )</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> QDomDocumentType </td><td class="memItemRight bottomAlign"><b><a href="qdomimplementation.html#createDocumentType">createDocumentType</a></b> ( const QString & <i>qName</i>, const QString & <i>publicId</i>, const QString & <i>systemId</i> )</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> bool </td><td class="memItemRight bottomAlign"><b><a href="qdomimplementation.html#hasFeature">hasFeature</a></b> ( const QString & <i>feature</i>, const QString & <i>version</i> ) const</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> bool </td><td class="memItemRight bottomAlign"><b><a href="qdomimplementation.html#isNull">isNull</a></b> ()</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> bool </td><td class="memItemRight bottomAlign"><b><a href="qdomimplementation.html#operator-not-eq">operator!=</a></b> ( const QDomImplementation & <i>x</i> ) const</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> QDomImplementation & </td><td class="memItemRight bottomAlign"><b><a href="qdomimplementation.html#operator-eq">operator=</a></b> ( const QDomImplementation & <i>x</i> )</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> bool </td><td class="memItemRight bottomAlign"><b><a href="qdomimplementation.html#operator-eq-eq">operator==</a></b> ( const QDomImplementation & <i>x</i> ) const</td></tr>
</table>
<a name="static-public-members"></a>
<h2>Static Public Members</h2>
<table class="alignedsummary">
<tr><td class="memItemLeft rightAlign topAlign"> InvalidDataPolicy </td><td class="memItemRight bottomAlign"><b><a href="qdomimplementation.html#invalidDataPolicy">invalidDataPolicy</a></b> ()</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> void </td><td class="memItemRight bottomAlign"><b><a href="qdomimplementation.html#setInvalidDataPolicy">setInvalidDataPolicy</a></b> ( InvalidDataPolicy <i>policy</i> )</td></tr>
</table>
<a name="details"></a>
<!-- $$$QDomImplementation-description -->
<div class="descr">
<h2>Detailed Description</h2>
<p>The QDomImplementation class provides information about the features of the DOM implementation.</p>
<p>This class describes the features that are supported by the DOM implementation. Currently the XML subset of DOM Level 1 and DOM Level 2 Core are supported.</p>
<p>Normally you will use the function <a href="qdomdocument.html#implementation">QDomDocument::implementation</a>() to get the implementation object.</p>
<p>You can create a new document type with <a href="qdomimplementation.html#createDocumentType">createDocumentType</a>() and a new document with <a href="qdomimplementation.html#createDocument">createDocument</a>().</p>
<p>For further information about the Document Object Model see <a href="http://www.w3.org/TR/REC-DOM-Level-1/">Level 1</a> and <a href="http://www.w3.org/TR/DOM-Level-2-Core/">Level 2 Core</a>. For a more general introduction of the DOM implementation see the <a href="qdomdocument.html">QDomDocument</a> documentation.</p>
<p>The QDom classes have a few issues of nonconformance with the XML specifications that cannot be fixed in Qt 4 without breaking backward compatibility. The <a href="qtxmlpatterns.html">QtXmlPatterns</a> module and the <a href="qxmlstreamreader.html">QXmlStreamReader</a> and <a href="qxmlstreamwriter.html">QXmlStreamWriter</a> classes have a higher degree of a conformance.</p>
</div>
<p><b>See also </b><a href="qdomimplementation.html#hasFeature">hasFeature</a>().</p>
<!-- @@@QDomImplementation -->
<div class="types">
<h2>Member Type Documentation</h2>
<!-- $$$InvalidDataPolicy$$$AcceptInvalidChars$$$DropInvalidChars$$$ReturnNullNode -->
<h3 class="fn"><a name="InvalidDataPolicy-enum"></a>enum QDomImplementation::<span class="name">InvalidDataPolicy</span></h3>
<p>This enum specifies what should be done when a factory function in <a href="qdomdocument.html">QDomDocument</a> is called with invalid data.</p>
<table class="valuelist"><tr valign="top" class="odd"><th class="tblConst">Constant</th><th class="tblval">Value</th><th class="tbldscr">Description</th></tr>
<tr><td class="topAlign"><tt>QDomImplementation::AcceptInvalidChars</tt></td><td class="topAlign"><tt>0</tt></td><td class="topAlign">The data should be stored in the DOM object anyway. In this case the resulting XML document might not be well-formed. This is the default value and QDom's behavior in Qt < 4.1.</td></tr>
<tr><td class="topAlign"><tt>QDomImplementation::DropInvalidChars</tt></td><td class="topAlign"><tt>1</tt></td><td class="topAlign">The invalid characters should be removed from the data.</td></tr>
<tr><td class="topAlign"><tt>QDomImplementation::ReturnNullNode</tt></td><td class="topAlign"><tt>2</tt></td><td class="topAlign">The factory function should return a null node.</td></tr>
</table>
<p><b>See also </b><a href="qdomimplementation.html#setInvalidDataPolicy">setInvalidDataPolicy</a>() and <a href="qdomimplementation.html#invalidDataPolicy">invalidDataPolicy</a>().</p>
<!-- @@@InvalidDataPolicy -->
</div>
<div class="func">
<h2>Member Function Documentation</h2>
<!-- $$$QDomImplementation[overload1]$$$QDomImplementation -->
<h3 class="fn"><a name="QDomImplementation"></a>QDomImplementation::<span class="name">QDomImplementation</span> ()</h3>
<p>Constructs a <a href="qdomimplementation.html">QDomImplementation</a> object.</p>
<!-- @@@QDomImplementation -->
<!-- $$$QDomImplementation$$$QDomImplementationconstQDomImplementation& -->
<h3 class="fn"><a name="QDomImplementation-2"></a>QDomImplementation::<span class="name">QDomImplementation</span> ( const <span class="type">QDomImplementation</span> & <i>x</i> )</h3>
<p>Constructs a copy of <i>x</i>.</p>
<!-- @@@QDomImplementation -->
<!-- $$$~QDomImplementation[overload1]$$$~QDomImplementation -->
<h3 class="fn"><a name="dtor.QDomImplementation"></a>QDomImplementation::<span class="name">~QDomImplementation</span> ()</h3>
<p>Destroys the object and frees its resources.</p>
<!-- @@@~QDomImplementation -->
<!-- $$$createDocument[overload1]$$$createDocumentconstQString&constQString&constQDomDocumentType& -->
<h3 class="fn"><a name="createDocument"></a><span class="type"><a href="qdomdocument.html">QDomDocument</a></span> QDomImplementation::<span class="name">createDocument</span> ( const <span class="type"><a href="qstring.html">QString</a></span> & <i>nsURI</i>, const <span class="type"><a href="qstring.html">QString</a></span> & <i>qName</i>, const <span class="type"><a href="qdomdocumenttype.html">QDomDocumentType</a></span> & <i>doctype</i> )</h3>
<p>Creates a DOM document with the document type <i>doctype</i>. This function also adds a root element node with the qualified name <i>qName</i> and the namespace URI <i>nsURI</i>.</p>
<!-- @@@createDocument -->
<!-- $$$createDocumentType[overload1]$$$createDocumentTypeconstQString&constQString&constQString& -->
<h3 class="fn"><a name="createDocumentType"></a><span class="type"><a href="qdomdocumenttype.html">QDomDocumentType</a></span> QDomImplementation::<span class="name">createDocumentType</span> ( const <span class="type"><a href="qstring.html">QString</a></span> & <i>qName</i>, const <span class="type"><a href="qstring.html">QString</a></span> & <i>publicId</i>, const <span class="type"><a href="qstring.html">QString</a></span> & <i>systemId</i> )</h3>
<p>Creates a document type node for the name <i>qName</i>.</p>
<p><i>publicId</i> specifies the public identifier of the external subset. If you specify an empty string (QString()) as the <i>publicId</i>, this means that the document type has no public identifier.</p>
<p><i>systemId</i> specifies the system identifier of the external subset. If you specify an empty string as the <i>systemId</i>, this means that the document type has no system identifier.</p>
<p>Since you cannot have a public identifier without a system identifier, the public identifier is set to an empty string if there is no system identifier.</p>
<p>DOM level 2 does not support any other document type declaration features.</p>
<p>The only way you can use a document type that was created this way, is in combination with the <a href="qdomimplementation.html#createDocument">createDocument</a>() function to create a <a href="qdomdocument.html">QDomDocument</a> with this document type.</p>
<p>In the DOM specification, this is the only way to create a non-null document. For historical reasons, Qt also allows to create the document using the default empty constructor. The resulting document is null, but becomes non-null when a factory function, for example <a href="qdomdocument.html#createElement">QDomDocument::createElement</a>(), is called. The document also becomes non-null when setContent() is called.</p>
<p><b>See also </b><a href="qdomimplementation.html#createDocument">createDocument</a>().</p>
<!-- @@@createDocumentType -->
<!-- $$$hasFeature[overload1]$$$hasFeatureconstQString&constQString& -->
<h3 class="fn"><a name="hasFeature"></a><span class="type">bool</span> QDomImplementation::<span class="name">hasFeature</span> ( const <span class="type"><a href="qstring.html">QString</a></span> & <i>feature</i>, const <span class="type"><a href="qstring.html">QString</a></span> & <i>version</i> ) const</h3>
<p>The function returns true if QDom implements the requested <i>version</i> of a <i>feature</i>; otherwise returns false.</p>
<p>The currently supported features and their versions:</p>
<table class="generic">
<thead><tr class="qt-style"><th >Feature</th><th >Version</th></tr></thead>
<tr valign="top" class="odd"><td >XML</td><td >1.0</td></tr>
</table>
<!-- @@@hasFeature -->
<!-- $$$invalidDataPolicy[overload1]$$$invalidDataPolicy -->
<h3 class="fn"><a name="invalidDataPolicy"></a><span class="type"><a href="qdomimplementation.html#InvalidDataPolicy-enum">InvalidDataPolicy</a></span> QDomImplementation::<span class="name">invalidDataPolicy</span> ()<tt> [static]</tt></h3>
<p>Returns the invalid data policy, which specifies what should be done when a factory function in <a href="qdomdocument.html">QDomDocument</a> is passed invalid data.</p>
<p><b>Warning:</b> This function is not <a href="threads-reentrancy.html#reentrant">reentrant</a>.</p>
<p>This function was introduced in Qt 4.1.</p>
<p><b>See also </b><a href="qdomimplementation.html#setInvalidDataPolicy">setInvalidDataPolicy</a>() and <a href="qdomimplementation.html#InvalidDataPolicy-enum">InvalidDataPolicy</a>.</p>
<!-- @@@invalidDataPolicy -->
<!-- $$$isNull[overload1]$$$isNull -->
<h3 class="fn"><a name="isNull"></a><span class="type">bool</span> QDomImplementation::<span class="name">isNull</span> ()</h3>
<p>Returns false if the object was created by <a href="qdomdocument.html#implementation">QDomDocument::implementation</a>(); otherwise returns true.</p>
<!-- @@@isNull -->
<!-- $$$setInvalidDataPolicy[overload1]$$$setInvalidDataPolicyInvalidDataPolicy -->
<h3 class="fn"><a name="setInvalidDataPolicy"></a><span class="type">void</span> QDomImplementation::<span class="name">setInvalidDataPolicy</span> ( <span class="type"><a href="qdomimplementation.html#InvalidDataPolicy-enum">InvalidDataPolicy</a></span> <i>policy</i> )<tt> [static]</tt></h3>
<p>Sets the invalid data policy, which specifies what should be done when a factory function in <a href="qdomdocument.html">QDomDocument</a> is passed invalid data.</p>
<p>The <i>policy</i> is set for all instances of <a href="qdomdocument.html">QDomDocument</a> which already exist and which will be created in the future.</p>
<pre class="cpp"> <span class="type"><a href="qdomdocument.html">QDomDocument</a></span> doc;
<span class="type"><a href="qdomimplementation.html">QDomImplementation</a></span> impl;
<span class="comment">// This will create the element, but the resulting XML document will</span>
<span class="comment">// be invalid, because '~' is not a valid character in a tag name.</span>
impl<span class="operator">.</span>setInvalidDataPolicy(<span class="type"><a href="qdomimplementation.html">QDomImplementation</a></span><span class="operator">::</span>AcceptInvalidData);
<span class="type"><a href="qdomelement.html">QDomElement</a></span> elt1 <span class="operator">=</span> doc<span class="operator">.</span>createElement(<span class="string">"foo~bar"</span>);
<span class="comment">// This will create an element with the tag name "foobar".</span>
impl<span class="operator">.</span>setInvalidDataPolicy(<span class="type"><a href="qdomimplementation.html">QDomImplementation</a></span><span class="operator">::</span>DropInvalidData);
<span class="type"><a href="qdomelement.html">QDomElement</a></span> elt2 <span class="operator">=</span> doc<span class="operator">.</span>createElement(<span class="string">"foo~bar"</span>);
<span class="comment">// This will create a null element.</span>
impl<span class="operator">.</span>setInvalidDataPolicy(<span class="type"><a href="qdomimplementation.html">QDomImplementation</a></span><span class="operator">::</span>ReturnNullNode);
<span class="type"><a href="qdomelement.html">QDomElement</a></span> elt3 <span class="operator">=</span> doc<span class="operator">.</span>createElement(<span class="string">"foo~bar"</span>);</pre>
<p><b>Warning:</b> This function is not <a href="threads-reentrancy.html#reentrant">reentrant</a>.</p>
<p>This function was introduced in Qt 4.1.</p>
<p><b>See also </b><a href="qdomimplementation.html#invalidDataPolicy">invalidDataPolicy</a>() and <a href="qdomimplementation.html#InvalidDataPolicy-enum">InvalidDataPolicy</a>.</p>
<!-- @@@setInvalidDataPolicy -->
<!-- $$$operator!=[overload1]$$$operator!=constQDomImplementation& -->
<h3 class="fn"><a name="operator-not-eq"></a><span class="type">bool</span> QDomImplementation::<span class="name">operator!=</span> ( const <span class="type">QDomImplementation</span> & <i>x</i> ) const</h3>
<p>Returns true if <i>x</i> and this DOM implementation object were created from different QDomDocuments; otherwise returns false.</p>
<!-- @@@operator!= -->
<!-- $$$operator=[overload1]$$$operator=constQDomImplementation& -->
<h3 class="fn"><a name="operator-eq"></a><span class="type">QDomImplementation</span> & QDomImplementation::<span class="name">operator=</span> ( const <span class="type">QDomImplementation</span> & <i>x</i> )</h3>
<p>Assigns <i>x</i> to this DOM implementation.</p>
<!-- @@@operator= -->
<!-- $$$operator==[overload1]$$$operator==constQDomImplementation& -->
<h3 class="fn"><a name="operator-eq-eq"></a><span class="type">bool</span> QDomImplementation::<span class="name">operator==</span> ( const <span class="type">QDomImplementation</span> & <i>x</i> ) const</h3>
<p>Returns true if <i>x</i> and this DOM implementation object were created from the same <a href="qdomdocument.html">QDomDocument</a>; otherwise returns false.</p>
<!-- @@@operator== -->
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