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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.

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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.
# $Id: rdfs-fb-tgc.rules,v 1.10 2006/11/16 14:23:31 der Exp $
#------------------------------------------------------------------

#------------------------------------------------------------------
# Tabling directives
#------------------------------------------------------------------

-> tableAll().

#------------------------------------------------------------------
# RDFS Axioms
#------------------------------------------------------------------

-> (rdf:type      rdfs:range rdfs:Class).
-> (rdfs:Resource  rdf:type  rdfs:Class).
-> (rdfs:Literal   rdf:type  rdfs:Class).
-> (rdf:Statement  rdf:type  rdfs:Class).
-> (rdf:nil        rdf:type  rdf:List).
-> (rdf:subject    rdf:type  rdf:Property).
-> (rdf:object     rdf:type  rdf:Property).
-> (rdf:predicate  rdf:type  rdf:Property).
-> (rdf:first      rdf:type  rdf:Property).
-> (rdf:rest       rdf:type  rdf:Property).
-> (rdf:value      rdf:type  rdf:Property).
-> (rdfs:member     rdf:type  rdf:Property).
               
-> (rdfs:subPropertyOf rdfs:domain rdf:Property).
-> (rdfs:subClassOf rdfs:domain rdfs:Class).
-> (rdfs:domain rdfs:domain rdf:Property).
-> (rdfs:range rdfs:domain rdf:Property).
-> (rdf:type rdfs:domain rdfs:Resource).
-> (rdfs:comment rdfs:domain rdfs:Resource).
-> (rdfs:label rdfs:domain rdfs:Resource).
-> (rdf:subject rdfs:domain rdf:Statement).
-> (rdf:predicate rdfs:domain rdf:Statement).
-> (rdf:object rdfs:domain rdf:Statement).
-> (rdf:first rdfs:domain rdf:List).
-> (rdf:rest rdfs:domain rdf:List).

-> (rdfs:subPropertyOf rdfs:range rdf:Property).
-> (rdfs:subClassOf rdfs:range rdfs:Class).
-> (rdfs:domain rdfs:range rdfs:Class).
-> (rdfs:range rdfs:range rdfs:Class).
-> (rdf:type rdfs:range rdfs:Class).
-> (rdfs:comment rdfs:range rdfs:Literal).
-> (rdfs:label rdfs:range rdfs:Literal).
-> (rdf:subject rdfs:range rdfs:Resource).
-> (rdf:predicate rdfs:range rdf:Property).
-> (rdf:object rdfs:range rdfs:Resource).
-> (rdf:first rdfs:range rdfs:Resource).
-> (rdf:rest rdfs:range rdf:List).

-> (rdf:Alt rdfs:subClassOf rdfs:Container).
-> (rdf:Bag rdfs:subClassOf rdfs:Container).
-> (rdf:Seq rdfs:subClassOf rdfs:Container).
-> (rdfs:ContainerMembershipProperty rdfs:subClassOf rdf:Property).

-> (rdfs:isDefinedBy rdfs:subPropertyOf rdfs:seeAlso).

-> (rdf:XMLLiteral rdf:type rdfs:Datatype).
-> (rdfs:Datatype rdfs:subClassOf rdfs:Class).

#------------------------------------------------------------------
# RDFS Closure rules
#------------------------------------------------------------------

# This one could be omitted since the results are not really very interesting!
[rdf1and4: (?x ?p ?y) -> (?p rdf:type rdf:Property), (?x rdf:type rdfs:Resource), (?y rdf:type rdfs:Resource)]

[rdfs7b: (?a rdf:type rdfs:Class) -> (?a rdfs:subClassOf rdfs:Resource)] 

[rdfs2:  (?p rdfs:domain ?c) -> [(?x rdf:type ?c) <- (?x ?p ?y)] ] 
[rdfs3:  (?p rdfs:range ?c)  -> [(?y rdf:type ?c) <- (?x ?p ?y)] ] 
[rdfs5b: (?a rdf:type rdf:Property) -> (?a rdfs:subPropertyOf ?a)] 
[rdfs6:  (?p rdfs:subPropertyOf ?q), notEqual(?p,?q) -> [ (?a ?q ?b) <- (?a ?p ?b)] ] 
[rdfs7:  (?a rdf:type rdfs:Class) -> (?a rdfs:subClassOf ?a)]
[rdfs10: (?x rdf:type rdfs:ContainerMembershipProperty) -> (?x rdfs:subPropertyOf rdfs:member)] 

[rdfs2-partial: (?p rdfs:domain ?c) -> (?c rdf:type rdfs:Class)]
[rdfs3-partial: (?p rdfs:range ?c)  -> (?c rdf:type rdfs:Class)]

# 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)] 
					
#------------------------------------------------------------------
# Declaration of main XSD datatypes
#------------------------------------------------------------------

-> (xsd:float rdf:type rdfs:Datatype).
-> (xsd:double rdf:type rdfs:Datatype).
-> (xsd:int rdf:type rdfs:Datatype).
-> (xsd:long rdf:type rdfs:Datatype).
-> (xsd:short rdf:type rdfs:Datatype).
-> (xsd:byte rdf:type rdfs:Datatype).
-> (xsd:unsignedByte rdf:type rdfs:Datatype).
-> (xsd:unsignedShort rdf:type rdfs:Datatype).
-> (xsd:unsignedInt rdf:type rdfs:Datatype).
-> (xsd:unsignedLong rdf:type rdfs:Datatype).
-> (xsd:decimal rdf:type rdfs:Datatype).
-> (xsd:integer rdf:type rdfs:Datatype).
-> (xsd:nonPositiveInteger rdf:type rdfs:Datatype).
-> (xsd:nonNegativeInteger rdf:type rdfs:Datatype).
-> (xsd:positiveInteger rdf:type rdfs:Datatype).
-> (xsd:negativeInteger rdf:type rdfs:Datatype).
-> (xsd:boolean rdf:type rdfs:Datatype).
-> (xsd:string rdf:type rdfs:Datatype).
-> (xsd:anyURI rdf:type rdfs:Datatype).
-> (xsd:hexBinary rdf:type rdfs:Datatype).
-> (xsd:base64Binary  rdf:type rdfs:Datatype).
-> (xsd:date rdf:type rdfs:Datatype).
-> (xsd:time rdf:type rdfs:Datatype).
-> (xsd:dateTime rdf:type rdfs:Datatype).
-> (xsd:duration rdf:type rdfs:Datatype).
-> (xsd:gDay rdf:type rdfs:Datatype).
-> (xsd:gMonth rdf:type rdfs:Datatype).
-> (xsd:gYear rdf:type rdfs:Datatype).
-> (xsd:gYearMonth rdf:type rdfs:Datatype).
-> (xsd:gMonthDay rdf:type rdfs:Datatype).

#-> (xsd:integer rdfs:subClassOf xsd:decimal).

-> hide(rb:xsdBase).
-> hide(rb:xsdRange).
-> hide(rb:prototype).

-> (xsd:byte rb:xsdBase xsd:decimal).
-> (xsd:short rb:xsdBase xsd:decimal).
-> (xsd:int rb:xsdBase xsd:decimal).
-> (xsd:long rb:xsdBase xsd:decimal).
-> (xsd:unsignedByte rb:xsdBase xsd:decimal).
-> (xsd:unsignedShort rb:xsdBase xsd:decimal).
-> (xsd:unsignedInt rb:xsdBase xsd:decimal).
-> (xsd:unsignedLong rb:xsdBase xsd:decimal).
-> (xsd:integer rb:xsdBase xsd:decimal).
-> (xsd:nonNegativeInteger rb:xsdBase xsd:decimal).
-> (xsd:nonPositiveInteger rb:xsdBase xsd:decimal).
-> (xsd:byte rb:xsdBase xsd:decimal).
-> (xsd:float rb:xsdBase xsd:float).
-> (xsd:decimal rb:xsdBase xsd:decimal).
-> (xsd:string rb:xsdBase xsd:string).
-> (xsd:boolean rb:xsdBase xsd:boolean).
-> (xsd:date rb:xsdBase xsd:date).
-> (xsd:time rb:xsdBase xsd:time).
-> (xsd:dateTime rb:xsdBase xsd:dateTime).
-> (xsd:duration rb:xsdBase xsd:duration).

# Describe range (base type, signed, min bits)
-> (xsd:byte    rb:xsdRange xsd(xsd:integer,1,8)).
-> (xsd:short   rb:xsdRange xsd(xsd:integer,1,16)).
-> (xsd:int     rb:xsdRange xsd(xsd:integer,1,32)).
-> (xsd:long    rb:xsdRange xsd(xsd:integer,1,64)).
-> (xsd:integer rb:xsdRange xsd(xsd:integer,1,65)).
							
-> (xsd:unsignedByte    rb:xsdRange xsd(xsd:integer,0,8)).
-> (xsd:unsignedShort   rb:xsdRange xsd(xsd:integer,0,16)).
-> (xsd:unsignedInt     rb:xsdRange xsd(xsd:integer,0,32)).
-> (xsd:unsignedLong    rb:xsdRange xsd(xsd:integer,0,64)).
-> (xsd:nonNegativeInteger rb:xsdRange xsd(xsd:integer,0,65)).

# Some XSD support may be disabled temporarily during performance checking

#[xsd1: (?X rdfs:subClassOf ?Y) <- 
#        (?X rb:xsdRange xsd(?B, 0, ?L)) (?Y rb:xsdRange xsd(?B, ?S, ?L2)) le(?L, ?L2)]

#[xsd2: (?X rdfs:subClassOf ?Y) <- 
#        (?X rb:xsdRange xsd(?B, 1, ?L)) (?Y rb:xsdRange xsd(?B, 1, ?L2)) le(?L, ?L2)]

#[range1: (?P rdfs:range ?C) <- 
#			(?P rdfs:range ?D), (?D rb:xsdRange xsd(?B, ?S1, ?L1)), 
#			(?P rdfs:range ?E), notEqual(?D, ?E), 
#			(?E rb:xsdRange xsd(?B, ?S2, ?L2)), 
#			min(?S1, ?S2, ?S3),
#			min(?L1, ?L2, ?L3),
#			(?C rb:xsdRange xsd(?B, ?S3, ?L3)),
#			]

#------------------------------------------------------------------
# Validation rules. These are dormant by default but are triggered
# by the additional of a validation control triple to the graph.
#------------------------------------------------------------------

[validationDisjoint: (?v rb:validation on()) ->
	[validationIndiv: (?X rb:violation error('disjoint', 'Subclass relationship asserted between disjoint datatypes', ?Y)) 
				<- (?C rdfs:subClassOf ?D) notEqual(?C, ?D),
  			       (?C rb:xsdBase ?BC), (?D rb:xsdBase ?BD), notEqual(?BC, ?BD) ] ]

# Hardwired anyway
#[validationDTRange: (?v rb:validation on()), (?P rdfs:range ?R) (?R rdf:type rdfs:Datatype)
#	[validationDTRange: (?X rb:violation error('range check', 'Incorrectly typed literal due to range (prop, value)', ?P, ?V))
#				<- (?X ?P ?V), notDType(?V, ?R)  ] ]

[validationDTRange: (?v rb:validation on()), (?P rdfs:range rdfs:Literal)  ->
	[validationDTRange: (?X rb:violation error('range check', 'Incorrectly typed literal due to range rdsf:Literal (prop, value)', ?P, ?V))
				<- (?X ?P ?V), notLiteral(?V), notBNode(?V) ] ]




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