The example ontology has two classes (:MyClass and :Value) and two properties (:MyObjProp and :MyDataProp). :MyClass a owl:Class ; a sh:NodeShape ; rdfs:subClassOf owl:Thing ; . :MyDataProp a owl:DatatypeProperty ; rdfs:domain :MyClass ; rdfs:range xsd:string ; . :MyObjProp a owl:ObjectProperty ; rdfs:domain :MyClass ; rdfs:range :Value ; . :Value a owl:Class ; rdfs:subClassOf owl:Thing ; .
Some instances were added.
:MyClass_1
a :MyClass ;
:MyDataProp :Value_1 ;
:MyObjProp :Value_1 ; .
:MyClass_2 a :MyClass ;
:MyObjProp :Value_2 ;
.
:Value_1
a :Value ;
.
:Value_2
a :Value ;
.
A NodeShape :NodeShapeRule with a sh:rule (:SPARQLRule_1) was created. This
rule creates new triples. With the sh:condition the rule should be
restricted to a subset of targets.
:NodeShapeRule
a sh:NodeShape ;
sh:rule :SPARQLRule_1 ;
sh:targetClass :MyClass ;
.
:SPARQLRule_1
a sh:SPARQLRule ;
sh:condition :NodeShapeConditionSPARQL ;
sh:construct """
PREFIX : <http://example.org/ex#>
CONSTRUCT {
$this :MyDataProp \"New input\" .
}
WHERE {
$this :MyObjProp ?p .
}
""" ;
.
For the restriction two equivalent NodeShapes were defined. The first
constraint works with sh:property, the other uses sh:sparql.
:NodeShapeConditionProperty
a sh:NodeShape ;
sh:property [
sh:path :MyObjProp ;
sh:description "NodeShapeConditionProperty" ;
sh:hasValue :Value_1 ;
] ;
sh:targetClass :MyClass ;
.
:NodeShapeConditionSPARQL
a sh:NodeShape ;
sh:sparql [
sh:message "NodeShapeConditionSPARQL" ;
sh:prefixes <http://example.org/ex> ;
sh:select """
PREFIX : <http://example.org/ex#>
SELECT $this
WHERE {
$this :MyObjProp ?prop .
}
""" ;
] ;
sh:targetClass :MyClass ;
.
While doing inferencing with Topbraid Composer I received different results
for both solutions. Only the solution with sh:property provides the
expected response. Please, can anyone explain me this behavior?
:MyClass_1 :MyDataProp "New input"
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ExampleRule.ttl
Description: Binary data
