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<title>Set RDF statement callback handler</title>
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<a name="tutorial-parser-set-triple-handler"></a>Set RDF statement callback handler</h2></div></div></div>
<p>The main reason to parse a syntax is to get RDF triples
returned and these are return by a user-defined handler function
which is called with parameters of a user data pointer and a
raptor statement, which includes the triple terms plus the
optional named graph term. The handler is set with
<a class="link" href="raptor2-section-parser.html#raptor-parser-set-statement-handler" title="raptor_parser_set_statement_handler ()"><code class="function">raptor_parser_set_statement_handler()</code></a>
as follows:
</p>
<pre class="programlisting">
void
statement_handler(void* user_data, const raptor_statement* statement)
{
/* do something with the statement */
}
raptor_parser_set_statement_handler(rdf_parser, user_data, statements_handler);
</pre>
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<p>Setting a stateemnt handler function is optional since parsing
without returning statements is a valid use, such as when parsing in
order to validate a syntax.
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