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<h3><a name="toc">Contents</a></h3>
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<li class="level1"><a href="#public-functions">Public Functions</a></li>
<li class="level1"><a href="#details">Detailed Description</a></li>
<li class="level2"><a href="#xml-schema-version">XML Schema Version</a></li>
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<h1 class="title">QXmlSchema Class</h1>
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<p>The QXmlSchema class provides loading and validation of a W3C XML Schema. <a href="#details">More...</a></p>
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<table class="alignedsummary">
<tr><td class="memItemLeft rightAlign topAlign"> Header:</td><td class="memItemRight bottomAlign"> </b><tt><span class="preprocessor">#include <QXmlSchema></span>
</tt></td></tr><tr><td class="memItemLeft rightAlign topAlign"> qmake:</td><td class="memItemRight bottomAlign"> <tt>QT += xmlpatterns</tt></td></tr><tr><td class="memItemLeft rightAlign topAlign"> Since:</td><td class="memItemRight bottomAlign"> Qt 4.6</td></tr></table><p><b>Note:</b> All functions in this class are reentrant.</p>
<ul>
<li><a href="qxmlschema-members.html">List of all members, including inherited members</a></li>
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<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="qxmlschema.html#QXmlSchema">QXmlSchema</a></b>()</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> </td><td class="memItemRight bottomAlign"><b><a href="qxmlschema.html#QXmlSchema-2">QXmlSchema</a></b>(const QXmlSchema &<i> other</i>)</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> </td><td class="memItemRight bottomAlign"><b><a href="qxmlschema.html#dtor.QXmlSchema">~QXmlSchema</a></b>()</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> QUrl </td><td class="memItemRight bottomAlign"><b><a href="qxmlschema.html#documentUri">documentUri</a></b>() const</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> bool </td><td class="memItemRight bottomAlign"><b><a href="qxmlschema.html#isValid">isValid</a></b>() const</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> bool </td><td class="memItemRight bottomAlign"><b><a href="qxmlschema.html#load">load</a></b>(const QUrl &<i> source</i>)</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> bool </td><td class="memItemRight bottomAlign"><b><a href="qxmlschema.html#load-2">load</a></b>(QIODevice *<i> source</i>, const QUrl &<i> documentUri</i> = QUrl())</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> bool </td><td class="memItemRight bottomAlign"><b><a href="qxmlschema.html#load-3">load</a></b>(const QByteArray &<i> data</i>, const QUrl &<i> documentUri</i> = QUrl())</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> QAbstractMessageHandler * </td><td class="memItemRight bottomAlign"><b><a href="qxmlschema.html#messageHandler">messageHandler</a></b>() const</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> QXmlNamePool </td><td class="memItemRight bottomAlign"><b><a href="qxmlschema.html#namePool">namePool</a></b>() const</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> QNetworkAccessManager * </td><td class="memItemRight bottomAlign"><b><a href="qxmlschema.html#networkAccessManager">networkAccessManager</a></b>() const</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> void </td><td class="memItemRight bottomAlign"><b><a href="qxmlschema.html#setMessageHandler">setMessageHandler</a></b>(QAbstractMessageHandler *<i> handler</i>)</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> void </td><td class="memItemRight bottomAlign"><b><a href="qxmlschema.html#setNetworkAccessManager">setNetworkAccessManager</a></b>(QNetworkAccessManager *<i> manager</i>)</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> void </td><td class="memItemRight bottomAlign"><b><a href="qxmlschema.html#setUriResolver">setUriResolver</a></b>(const QAbstractUriResolver *<i> resolver</i>)</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> const QAbstractUriResolver * </td><td class="memItemRight bottomAlign"><b><a href="qxmlschema.html#uriResolver">uriResolver</a></b>() const</td></tr>
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<a name="details"></a>
<!-- $$$QXmlSchema-description -->
<div class="descr">
<h2>Detailed Description</h2>
<p>The QXmlSchema class provides loading and validation of a W3C XML Schema.</p>
<p>The QXmlSchema class loads, compiles and validates W3C XML Schema files that can be used further for validation of XML instance documents via <a href="qxmlschemavalidator.html">QXmlSchemaValidator</a>.</p>
<p>The following example shows how to load a XML Schema file from the network and test whether it is a valid schema document:</p>
<pre class="cpp"> <span class="type">QUrl</span> url(<span class="string">"http://www.schema-example.org/myschema.xsd"</span>);
<span class="type">QXmlSchema</span> schema;
<span class="keyword">if</span> (schema<span class="operator">.</span>load(url) <span class="operator">=</span><span class="operator">=</span> <span class="keyword">true</span>)
qDebug() <span class="operator"><</span><span class="operator"><</span> <span class="string">"schema is valid"</span>;
<span class="keyword">else</span>
qDebug() <span class="operator"><</span><span class="operator"><</span> <span class="string">"schema is invalid"</span>;</pre>
<a name="xml-schema-version"></a>
<h3>XML Schema Version</h3>
<p>This class is used to represent schemas that conform to the <a href="http://www.w3.org/XML/Schema">XML Schema</a> 1.0 specification.</p>
</div>
<p><b>See also </b><a href="qxmlschemavalidator.html">QXmlSchemaValidator</a> and <a href="qtxmlpatterns-xmlpatterns-schema-example.html">XML Schema Validation Example</a>.</p>
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<div class="func">
<h2>Member Function Documentation</h2>
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<h3 class="fn"><a name="QXmlSchema"></a>QXmlSchema::<span class="name">QXmlSchema</span>()</h3>
<p>Constructs an invalid, empty schema that cannot be used until <a href="qxmlschema.html#load">load</a>() is called.</p>
<!-- @@@QXmlSchema -->
<!-- $$$QXmlSchema$$$QXmlSchemaconstQXmlSchema& -->
<h3 class="fn"><a name="QXmlSchema-2"></a>QXmlSchema::<span class="name">QXmlSchema</span>(const <span class="type">QXmlSchema</span> &<i> other</i>)</h3>
<p>Constructs a <a href="qxmlschema.html">QXmlSchema</a> that is a copy of <i>other</i>. The new instance will share resources with the existing schema to the extent possible.</p>
<!-- @@@QXmlSchema -->
<!-- $$$~QXmlSchema[overload1]$$$~QXmlSchema -->
<h3 class="fn"><a name="dtor.QXmlSchema"></a>QXmlSchema::<span class="name">~QXmlSchema</span>()</h3>
<p>Destroys this <a href="qxmlschema.html">QXmlSchema</a>.</p>
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<h3 class="fn"><a name="documentUri"></a><span class="type">QUrl</span> QXmlSchema::<span class="name">documentUri</span>() const</h3>
<p>Returns the document URI of the schema or an empty URI if no schema has been set.</p>
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<!-- $$$isValid[overload1]$$$isValid -->
<h3 class="fn"><a name="isValid"></a><span class="type">bool</span> QXmlSchema::<span class="name">isValid</span>() const</h3>
<p>Returns true if this schema is valid. Examples of invalid schemas are ones that contain syntax errors or that do not conform the W3C XML Schema specification.</p>
<!-- @@@isValid -->
<!-- $$$load[overload1]$$$loadconstQUrl& -->
<h3 class="fn"><a name="load"></a><span class="type">bool</span> QXmlSchema::<span class="name">load</span>(const <span class="type">QUrl</span> &<i> source</i>)</h3>
<p>Sets this <a href="qxmlschema.html">QXmlSchema</a> to a schema loaded from the <i>source</i> URI.</p>
<p>If the schema <a href="qxmlschema.html#isValid">is invalid</a>, <tt>false</tt> is returned and the behavior is undefined.</p>
<p>Example:</p>
<pre class="cpp"> <span class="type">QUrl</span> url(<span class="string">"http://www.schema-example.org/myschema.xsd"</span>);
<span class="type"><a href="qxmlschema.html">QXmlSchema</a></span> schema;
<span class="keyword">if</span> (schema<span class="operator">.</span>load(url) <span class="operator">=</span><span class="operator">=</span> <span class="keyword">true</span>)
qDebug() <span class="operator"><</span><span class="operator"><</span> <span class="string">"schema is valid"</span>;
<span class="keyword">else</span>
qDebug() <span class="operator"><</span><span class="operator"><</span> <span class="string">"schema is invalid"</span>;</pre>
<p><b>See also </b><a href="qxmlschema.html#isValid">isValid</a>().</p>
<!-- @@@load -->
<!-- $$$load$$$loadQIODevice*constQUrl& -->
<h3 class="fn"><a name="load-2"></a><span class="type">bool</span> QXmlSchema::<span class="name">load</span>(<span class="type">QIODevice</span> *<i> source</i>, const <span class="type">QUrl</span> &<i> documentUri</i> = QUrl())</h3>
<p>Sets this <a href="qxmlschema.html">QXmlSchema</a> to a schema read from the <i>source</i> device. The device must have been opened with at least QIODevice::ReadOnly.</p>
<p><i>documentUri</i> represents the schema obtained from the <i>source</i> device. It is the base URI of the schema, that is used internally to resolve relative URIs that appear in the schema, and for message reporting.</p>
<p>If <i>source</i> is <tt>null</tt> or not readable, or if <i>documentUri</i> is not a valid URI, behavior is undefined.</p>
<p>If the schema <a href="qxmlschema.html#isValid">is invalid</a>, <tt>false</tt> is returned and the behavior is undefined.</p>
<p>Example:</p>
<pre class="cpp"> <span class="type">QFile</span> file(<span class="string">"myschema.xsd"</span>);
file<span class="operator">.</span>open(<span class="type">QIODevice</span><span class="operator">::</span>ReadOnly);
<span class="type"><a href="qxmlschema.html">QXmlSchema</a></span> schema;
schema<span class="operator">.</span>load(<span class="operator">&</span>file<span class="operator">,</span> <span class="type">QUrl</span><span class="operator">::</span>fromLocalFile(file<span class="operator">.</span>fileName()));
<span class="keyword">if</span> (schema<span class="operator">.</span>isValid())
qDebug() <span class="operator"><</span><span class="operator"><</span> <span class="string">"schema is valid"</span>;
<span class="keyword">else</span>
qDebug() <span class="operator"><</span><span class="operator"><</span> <span class="string">"schema is invalid"</span>;</pre>
<p><b>See also </b><a href="qxmlschema.html#isValid">isValid</a>().</p>
<!-- @@@load -->
<!-- $$$load$$$loadconstQByteArray&constQUrl& -->
<h3 class="fn"><a name="load-3"></a><span class="type">bool</span> QXmlSchema::<span class="name">load</span>(const <span class="type">QByteArray</span> &<i> data</i>, const <span class="type">QUrl</span> &<i> documentUri</i> = QUrl())</h3>
<p>Sets this <a href="qxmlschema.html">QXmlSchema</a> to a schema read from the <i>data</i></p>
<p><i>documentUri</i> represents the schema obtained from the <i>data</i>. It is the base URI of the schema, that is used internally to resolve relative URIs that appear in the schema, and for message reporting.</p>
<p>If <i>documentUri</i> is not a valid URI, behavior is undefined.</p>
<p>If the schema <a href="qxmlschema.html#isValid">is invalid</a>, <tt>false</tt> is returned and the behavior is undefined.</p>
<p>Example:</p>
<pre class="cpp"> <span class="type">QByteArray</span> data( <span class="string">"<?xml version=\"1.0\" encoding=\"UTF-8\"?>"</span>
<span class="string">"<xsd:schema"</span>
<span class="string">" xmlns:xsd=\"http://www.w3.org/2001/XMLSchema\""</span>
<span class="string">" xmlns=\"http://www.qt-project.org/xmlschematest\""</span>
<span class="string">" targetNamespace=\"http://www.qt-project.org/xmlschematest\""</span>
<span class="string">" version=\"1.0\""</span>
<span class="string">" elementFormDefault=\"qualified\">"</span>
<span class="string">"</xsd:schema>"</span> );
<span class="type"><a href="qxmlschema.html">QXmlSchema</a></span> schema;
schema<span class="operator">.</span>load(data);
<span class="keyword">if</span> (schema<span class="operator">.</span>isValid())
qDebug() <span class="operator"><</span><span class="operator"><</span> <span class="string">"schema is valid"</span>;
<span class="keyword">else</span>
qDebug() <span class="operator"><</span><span class="operator"><</span> <span class="string">"schema is invalid"</span>;</pre>
<p><b>See also </b><a href="qxmlschema.html#isValid">isValid</a>() and <a href="qxmlschema.html#isValid">isValid</a>().</p>
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<h3 class="fn"><a name="messageHandler"></a><span class="type"><a href="qabstractmessagehandler.html">QAbstractMessageHandler</a></span> * QXmlSchema::<span class="name">messageHandler</span>() const</h3>
<p>Returns the message handler that handles compile and validation messages for this <a href="qxmlschema.html">QXmlSchema</a>.</p>
<p><b>See also </b><a href="qxmlschema.html#setMessageHandler">setMessageHandler</a>().</p>
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<!-- $$$namePool[overload1]$$$namePool -->
<h3 class="fn"><a name="namePool"></a><span class="type"><a href="qxmlnamepool.html">QXmlNamePool</a></span> QXmlSchema::<span class="name">namePool</span>() const</h3>
<p>Returns the name pool used by this <a href="qxmlschema.html">QXmlSchema</a> for constructing <a href="qxmlname.html">names</a>. There is no setter for the name pool, because mixing name pools causes errors due to name confusion.</p>
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<!-- $$$networkAccessManager[overload1]$$$networkAccessManager -->
<h3 class="fn"><a name="networkAccessManager"></a><span class="type">QNetworkAccessManager</span> * QXmlSchema::<span class="name">networkAccessManager</span>() const</h3>
<p>Returns the network manager, or 0 if it has not been set.</p>
<p><b>See also </b><a href="qxmlschema.html#setNetworkAccessManager">setNetworkAccessManager</a>().</p>
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<!-- $$$setMessageHandler[overload1]$$$setMessageHandlerQAbstractMessageHandler* -->
<h3 class="fn"><a name="setMessageHandler"></a><span class="type">void</span> QXmlSchema::<span class="name">setMessageHandler</span>(<span class="type"><a href="qabstractmessagehandler.html">QAbstractMessageHandler</a></span> *<i> handler</i>)</h3>
<p>Changes the <a href="qabstractmessagehandler.html">message handler</a> for this <a href="qxmlschema.html">QXmlSchema</a> to <i>handler</i>. The schema sends all compile and validation messages to this message handler. <a href="qxmlschema.html">QXmlSchema</a> does not take ownership of <i>handler</i>.</p>
<p>Normally, the default message handler is sufficient. It writes compile and validation messages to <i>stderr</i>. The default message handler includes color codes if <i>stderr</i> can render colors.</p>
<p>When <a href="qxmlschema.html">QXmlSchema</a> calls <a href="qabstractmessagehandler.html#message">QAbstractMessageHandler::message</a>(), the arguments are as follows:</p>
<table class="generic">
<thead><tr class="qt-style"><th >message() argument</th><th >Semantics</th></tr></thead>
<tr valign="top" class="odd"><td >QtMsgType type</td><td >Only QtWarningMsg and QtFatalMsg are used. The former identifies a warning, while the latter identifies an error.</td></tr>
<tr valign="top" class="even"><td >const QString & description</td><td >An XHTML document which is the actual message. It is translated into the current language.</td></tr>
<tr valign="top" class="odd"><td >const QUrl &identifier</td><td >Identifies the error with a URI, where the fragment is the error code, and the rest of the URI is the error namespace.</td></tr>
<tr valign="top" class="even"><td >const <a href="qsourcelocation.html">QSourceLocation</a> & sourceLocation</td><td >Identifies where the error occurred.</td></tr>
</table>
<p><b>See also </b><a href="qxmlschema.html#messageHandler">messageHandler</a>().</p>
<!-- @@@setMessageHandler -->
<!-- $$$setNetworkAccessManager[overload1]$$$setNetworkAccessManagerQNetworkAccessManager* -->
<h3 class="fn"><a name="setNetworkAccessManager"></a><span class="type">void</span> QXmlSchema::<span class="name">setNetworkAccessManager</span>(<span class="type">QNetworkAccessManager</span> *<i> manager</i>)</h3>
<p>Sets the network manager to <i>manager</i>. <a href="qxmlschema.html">QXmlSchema</a> does not take ownership of <i>manager</i>.</p>
<p><b>See also </b><a href="qxmlschema.html#networkAccessManager">networkAccessManager</a>().</p>
<!-- @@@setNetworkAccessManager -->
<!-- $$$setUriResolver[overload1]$$$setUriResolverconstQAbstractUriResolver* -->
<h3 class="fn"><a name="setUriResolver"></a><span class="type">void</span> QXmlSchema::<span class="name">setUriResolver</span>(const <span class="type"><a href="qabstracturiresolver.html">QAbstractUriResolver</a></span> *<i> resolver</i>)</h3>
<p>Sets the URI resolver to <i>resolver</i>. <a href="qxmlschema.html">QXmlSchema</a> does not take ownership of <i>resolver</i>.</p>
<p><b>See also </b><a href="qxmlschema.html#uriResolver">uriResolver</a>().</p>
<!-- @@@setUriResolver -->
<!-- $$$uriResolver[overload1]$$$uriResolver -->
<h3 class="fn"><a name="uriResolver"></a>const <span class="type"><a href="qabstracturiresolver.html">QAbstractUriResolver</a></span> * QXmlSchema::<span class="name">uriResolver</span>() const</h3>
<p>Returns the schema's URI resolver. If no URI resolver has been set, Qt XML Patterns will use the URIs in schemas as they are.</p>
<p>The URI resolver provides a level of abstraction, or <i>polymorphic URIs</i>. A resolver can rewrite <i>logical</i> URIs to physical ones, or it can translate obsolete or invalid URIs to valid ones.</p>
<p>When Qt XML Patterns calls <a href="qabstracturiresolver.html#resolve">QAbstractUriResolver::resolve</a>() the absolute URI is the URI mandated by the schema specification, and the relative URI is the URI specified by the user.</p>
<p><b>See also </b><a href="qxmlschema.html#setUriResolver">setUriResolver</a>().</p>
<!-- @@@uriResolver -->
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