Function: DB.DBA.RDF_LOAD_RDFA - Virtuoso Functions Guide

DB.DBA.RDF_LOAD_RDFA

Parses the content of RDF embedded as RDFa text as a sequence of separate RDF triples.

DB.DBA.RDF_LOAD_RDFA (in rdfa_text varchar, in omt_top_rdf varchar, in graph_uri varchar);

Description

Parses the content of RDF embedded as RDFa text as a sequence of separate RDF triples.

Parameters

rdfa_text – text of document containing RDFa data

omt_top_rdf – base IRI to resolve relative IRIs

graph_uri – the IRI of destination graph

Return Types

The return value is not specified and may be changed in future versions.

Examples

Load from local file:

SQL>sparql drop graph <http://virtuoso.openlinksw.com/example>;
Done. -- 2 msec.
SQL>DB.DBA.RDF_LOAD_RDFA (file_to_string ('pricing.html'), 'http://virtuoso.openlinksw.com/pricing/#', 'http://virtuoso.openlinksw.com/example');
Done. -- 106 msec.

Load from URI:

SQL> DB.DBA.RDF_LOAD_RDFA (http_get('http://virtuoso.openlinksw.com/pricing/'), 'http://virtuoso.openlinksw.com/pricing/#', 'http://virtuoso.openlinksw.com/example');
Done. -- 109 msec.

-- Check total triples retrieved: 
SQL>SPARQL 
SELECT COUNT(*)  
from <http://virtuoso.openlinksw.com/example>
WHERE {?s ?p ?o};
callret-0
INTEGER
_______________________________________________________________________________

1181

1 Rows. -- 16 msec.

22. Virtuoso Functions Guide - DB.DBA.RDF_LOAD_RDFA

DB.DBA.RDF_LOAD_RDFA