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<div class="titlepage"><div><div><h2 class="title" style="clear: both">
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<a name="tutorial-parser-set-namespace-handler"></a>Set namespace declared handler</h2></div></div></div>
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<p>Raptor can report when namespace prefix/URIs are declared in
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during parsing a syntax such as those in XML, RDF/XML or Turtle.
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A handler function can be set to receive these declarations using
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the namespace handler method.
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</p>
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<pre class="programlisting">
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raptor_namespace_handler namespaces_handler;
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raptor_set_namespace_handler(rdf_parser, user_data, namespaces_handler);
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</pre>
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<p>
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</p>
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<p>The <span class="emphasis"><em>namespaces_handler</em></span> takes the following signature:
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</p>
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<pre class="programlisting">
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void
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namespaces_handler(void* user_data, raptor_namespace *nspace) {
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/* */
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}
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</pre>
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<p>
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<div class="note" style="margin-left: 0.5in; margin-right: 0.5in;">
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<h3 class="title">Note</h3>This may be called multiple times with the same namespace,
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if the namespace is declared inside different XML sub-trees.
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