- library
- semweb
- rdf_db.pl -- Core RDF database
- rdf_cache.pl -- Cache RDF triples
- rdfs.pl -- RDFS handling
- rdf_persistency.pl -- RDF persistency plugin
- rdf_litindex.pl -- Search literals
- rdf11.pl -- RDF 1.1 API
- sparql_client.pl -- SPARQL client library
- turtle.pl -- Turtle: Terse RDF Triple Language
- rdf_turtle_write.pl -- Turtle - Terse RDF Triple Language writer
- rdf_http_plugin.pl -- RDF HTTP Plugin
- rdf_library.pl -- RDF Library Manager
- rdf_ntriples.pl -- Process files in the RDF N-Triples format
- rdf_zlib_plugin.pl -- RDF compressed-data plugin
- rdf_portray.pl -- Portray RDF resources
- semweb
- sparql_query(+Query, -Result, +Options) is nondet
- Execute a SPARQL query on an HTTP SPARQL endpoint. Query is an
atom that denotes the query. Result is unified to a term
rdf(S,P,O)
forCONSTRUCT
andDESCRIBE
queries,row(...)
forSELECT
queries andtrue
orfalse
forASK
queries. Options are- host(+Host)
- port(+Port)
- path(+Path)
- The above three options set the location of the server.
- search(+ListOfParams)
- Provide additional query parameters, such as the graph.
- variable_names(-ListOfNames)
- Unifies ListOfNames with a list of atoms that describe the
names of the variables in a
SELECT
query.
Remaining options are passed to http_open/3. The defaults for Host, Port and Path can be set using sparql_set_server/1. The initial default for port is 80 and path is
/sparql/
.For example, the ClioPatria server understands the parameter
entailment
. The code below queries for all triples using _rdfs_entailment.?- sparql_query('select * where { ?s ?p ?o }', Row, [ search([entailment=rdfs]) ]).