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