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Jena is a Java framework for building Semantic Web applications. It provides a programmatic environment for RDF, RDFS and OWL, SPARQL and includes a rule-based inference engine.
# Licensed to the Apache Software Foundation (ASF) under one
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# regarding copyright ownership. The ASF licenses this file
# to you under the Apache License, Version 2.0 (the
# "License"); you may not use this file except in compliance
# with the License. You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
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#------------------------------------------------------------------
# RDFS rule set v0.1.
# This variant is used in the case where the subclass and subproperty
# lattices have been precomputed by a transitive graph closure cache.
# and only includes the minimum useful core rules with no axioms.
# $Id: rdfs-fb-tgc-simple.rules,v 1.4 2009-03-09 18:10:16 der Exp $
#------------------------------------------------------------------
#------------------------------------------------------------------
# Tabling directives
#------------------------------------------------------------------
-> tableAll().
#------------------------------------------------------------------
# RDFS Closure rules
#------------------------------------------------------------------
[rdfs7b: (?a rdf:type rdfs:Class) -> (?a rdfs:subClassOf rdfs:Resource)]
[rdfs5b: (?a rdf:type rdf:Property) -> (?a rdfs:subPropertyOf ?a)]
[rdfs2: (?p rdfs:domain ?c) -> [(?x rdf:type ?c) <- (?x ?p ?y)] ]
[rdfs3: (?p rdfs:range ?c) -> [(?y rdf:type ?c) <- (?x ?p ?y)] ]
[rdfs6: (?p rdfs:subPropertyOf ?q), notEqual(?p,?q) -> [ (?a ?q ?b) <- (?a ?p ?b)] ]
# Either version should work, pure back one scales better.
# rdfs9: (?x rdfs:subClassOf ?y) -> [ (?a rdf:type ?y) <- (?a rdf:type ?x)] ]
[rdfs9-alt: (?a rdf:type ?y) <- (?x rdfs:subClassOf ?y), (?a rdf:type ?x) ]
# Not needed - replaced by TGC front end
#[rdfs8: (?a rdfs:subClassOf ?b), (?b rdfs:subClassOf ?c) -> (?a rdfs:subClassOf ?c)]
#[rdfs5a: (?a rdfs:subPropertyOf ?b), (?b rdfs:subPropertyOf ?c) -> (?a rdfs:subPropertyOf ?c)]
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