/**
Copyright (C) SYSTAP, LLC DBA Blazegraph 2006-2016. All rights reserved.
Contact:
SYSTAP, LLC DBA Blazegraph
2501 Calvert ST NW #106
Washington, DC 20008
licenses@blazegraph.com
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; version 2 of the License.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
package com.bigdata.rdf.rules;
import org.openrdf.model.vocabulary.RDFS;
import com.bigdata.bop.IConstraint;
import com.bigdata.bop.constraint.Constraint;
import com.bigdata.bop.constraint.NE;
import com.bigdata.rdf.spo.SPOPredicate;
import com.bigdata.rdf.vocab.Vocabulary;
import com.bigdata.relation.rule.Rule;
/**
* rdfs5: this variant uses a nested subquery and may be safely used during
* truth maintenance.
*
* <pre>
* triple(?u,rdfs:subPropertyOf,?x) :-
* triple(?u,rdfs:subPropertyOf,?v),
* triple(?v,rdfs:subPropertyOf,?x).
* </pre>
*/
public class RuleRdfs05 extends Rule {
/**
*
*/
private static final long serialVersionUID = -8059593032588823526L;
public RuleRdfs05(String relationName, Vocabulary vocab) {
super( "rdfs05",//
new SPOPredicate(relationName,var("u"), vocab.getConstant(RDFS.SUBPROPERTYOF), var("x")), //
new SPOPredicate[] { //
new SPOPredicate(relationName,var("u"), vocab.getConstant(RDFS.SUBPROPERTYOF), var("v")),//
new SPOPredicate(relationName,var("v"), vocab.getConstant(RDFS.SUBPROPERTYOF), var("x")) //
},
new IConstraint[] {
Constraint.wrap(new NE(var("u"),var("v"))),
Constraint.wrap(new NE(var("v"),var("x")))
});
}
}