view jamendo/sparql-archived/rdf_compile.pl @ 27:d95e683fbd35 tip

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:- module(rdf_compile,[init_db/0,rdf_compile/0]).

/**
 * Compile possible RDF statements to
 * improve responsiveness of the sparql 
 * end point, but loose the dynamicity of
 * the underlying data
 */

:- use_module(p2r_entailment).
:- use_module(library('semweb/rdf_persistency')).
:- use_module(library('semweb/rdf_db')).

init_db :-
	nl,writeln(' - Attaching DB...'),nl,
	rdf_attach_db('db',[]),
	settings:set_setting(serql_parms:default_entailment, rdfs).

rdf_compile :-
	nl,writeln(' - Deriving all possible RDF statements'),nl,
	setof(
		rdf(A,B,C)
	,
		p2r_entailment:rdf(A,B,C)
	,
		Triples
		),
	length(Triples,N),
	nl,write(' - Number of derived RDF statements: '),write(N),nl,nl,
	assert_l(Triples).

assert_l([]).
assert_l([rdf(A,B,C)|T]) :-
	rdf_assert(A,B,C),
	assert_l(T).