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<title>Soprano: RDF Storage</title>
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<div id="projectname">Soprano
 <span id="projectnumber">2.9.4</span>
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<li class="navelem"><a class="el" href="index.html">Soprano (aka QRDF) - A modular RDF storage framework</a></li> </ul>
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<div class="title">RDF Storage </div> </div>
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<div class="textblock"><p>The central class in <a class="el" href="namespaceSoprano.html">Soprano</a> is <a class="el" href="classSoprano_1_1Model.html" title="A Model is the central class in Soprano. It is a queryable collection of RDF quadruples, i.e statements.">Soprano::Model</a> which represents an RDF repository. Model provides methods to add, remove, and list statements and to query the repository.</p>
<p>The actual work is done by storage plugins (<a class="el" href="classSoprano_1_1Backend.html" title="Soprano::Backend defines the interface for a Soprano backend plugin.">Soprano::Backend</a>).</p>
<p>Model instances are mostly created by the plugin implementations through the <a class="el" href="classSoprano_1_1Backend.html#abe4347c68662b53fc2f709b4536febb2">Soprano::Backend::createModel()</a> methods. In the most simple case one does not need to bother with <a class="el" href="classSoprano_1_1Backend.html" title="Soprano::Backend defines the interface for a Soprano backend plugin.">Soprano::Backend</a> though, as the basic methods are duplicated in the <a class="el" href="namespaceSoprano.html">Soprano</a> namespace. Thus, to create a simple memory model using the default Soprano backend:</p>
<div class="fragment"><div class="line"><a class="code" href="classSoprano_1_1Model.html" title="A Model is the central class in Soprano. It is a queryable collection of RDF quadruples, i.e statements.">Soprano::Model</a> m = <a class="code" href="namespaceSoprano.html#a66f765cf9fd9aae07f874fdb8867dd1c">Soprano::createModel</a>();</div>
</div><!-- fragment --><p>Finer grained control can be achieved by using the Backend directly:</p>
<div class="fragment"><div class="line"><a class="code" href="classSoprano_1_1Backend.html" title="Soprano::Backend defines the interface for a Soprano backend plugin.">Soprano::Backend</a>* backend = <a class="code" href="namespaceSoprano.html#aeed48e726dae9828430ed9b397310481">Soprano::discoverBackendByName</a>( <span class="stringliteral">"redland"</span> );</div>
<div class="line"><a class="code" href="classSoprano_1_1Model.html" title="A Model is the central class in Soprano. It is a queryable collection of RDF quadruples, i.e statements.">Soprano::Model</a>* model = backend-><a class="code" href="classSoprano_1_1Backend.html#abe4347c68662b53fc2f709b4536febb2">createModel</a>();</div>
</div><!-- fragment --><p>Soprano makes use of contexts, i.e. named graphs. Thus, statements as represented by <a class="el" href="classSoprano_1_1Statement.html" title="A Statement instance represents one RDF quadruple.">Soprano::Statement</a> are actually RDF quadruples.</p>
<p>For further details on <a class="el" href="classSoprano_1_1Model.html" title="A Model is the central class in Soprano. It is a queryable collection of RDF quadruples, i.e statements.">Soprano::Model</a> usage see the class and method documentation.</p>
<p>For details on existing backends see: </p>
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<li><a class="el" href="soprano_backends.html">Soprano Backends</a> </li>
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