Reading an RDF/XML file with Raptor

document.cpp

#define SBOL_URI "http://sbolstandard.org/v2"

static void
print_triple(void* user_data, raptor_statement* triple)
{
	raptor_statement_print_as_ntriples(triple, stdout);
	fputc('\n', stdout);
}

void Document::read(std::string filename)
{
	FILE* fh = fopen(filename.c_str(), "rb");
	raptor_parser* rdf_parser = raptor_new_parser(this->rdf_graph, "rdfxml");
	raptor_iostream* ios = raptor_new_iostream_to_file_handle(this->rdf_graph, fh);

	raptor_parser_set_statement_handler(rdf_parser, NULL, print_triple);

	raptor_uri *sbol_uri = raptor_new_uri(this->rdf_graph, (const unsigned char *)SBOL_URI "#");
	raptor_parser_parse_iostream(rdf_parser, ios, sbol_uri);
	raptor_free_parser(rdf_parser);

	raptor_free_uri(sbol_uri);
}

test.xml

<?xml version="1.0" encoding="utf-8"?>
<rdf:RDF xmlns:dcterms="http://purl.org/dc/terms/#"
   xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
   xmlns:sbol="http://sbolstandard.org/v2#">
  <sbol:Identified rdf:about="http://examples.com/Identified/0">
    <sbol:identity>http://examples.com/Identified/0</sbol:identity>
    <sbol:persistentIdentity>http://sbolstandard.org/v2/Identified/example</sbol:persistentIdentity>
  </sbol:Identified>
  <sbol:ComponentDefinition rdf:about="http://examples.com/cdef_obj">
    <dcterms:description></dcterms:description>
    <dcterms:title></dcterms:title>
    <sbol:displayId>cdef_obj</sbol:displayId>
    <sbol:identity>http://examples.com/cdef_obj</sbol:identity>
    <sbol:persistentIdentity>http://examples.com/cdef_obj</sbol:persistentIdentity>
    <sbol:type>SO_0000001</sbol:type>
    <rdf:type rdf:resource="http://sbolstandard.org/v2#sequenceAnnotation"/>
  </sbol:ComponentDefinition>
  <sbol:ComponentDefinition rdf:about="http://sbolstandard.org/v2/ComponentDefinition/example">
    <dcterms:description></dcterms:description>
    <dcterms:title></dcterms:title>
    <sbol:displayId>example</sbol:displayId>
    <sbol:identity>http://sbolstandard.org/v2/ComponentDefinition/example</sbol:identity>
    <sbol:persistentIdentity>http://sbolstandard.org/v2/ComponentDefinition/example</sbol:persistentIdentity>
    <sbol:sequenceAnnotation rdf:resource="http://sbolstandard.org/v2/SequenceAnnotation/example"/>
    <sbol:type>SO_0000001</sbol:type>
    <rdf:type rdf:resource="http://sbolstandard.org/v2#sequenceAnnotation"/>
  </sbol:ComponentDefinition>
  <sbol:SequenceAnnotation rdf:about="http://sbolstandard.org/v2/SequenceAnnotation/example">
    <sbol:identity>http://sbolstandard.org/v2/SequenceAnnotation/example</sbol:identity>
    <sbol:persistentIdentity>http://sbolstandard.org/v2/SequenceAnnotation/example</sbol:persistentIdentity>
    <sbol:start>10</sbol:start>
  </sbol:SequenceAnnotation>
</rdf:RDF>