Hey Holger,
I have a spin:Template with an argument (in gp: namespace):
:DescribeInstancesTemplate a spin:Template ;
spin:constraint [ a spl:Argument ;
spl:predicate :type ;
spl:valueType rdfs:Resource
] ;
spin:body [ a sp:Describe, sp:Query ;
sp:resultNodes (_:instanceVar) ;
sp:text """DESCRIBE ?instance WHERE {
{
SELECT ?instance
WHERE {
?instance a ?type .
}
} .
}"""^^xsd:string ;
sp:where ([ a sp:SubQuery ;
# full RDF representation follows here
_:instanceVar sp:varName "instance"^^xsd:string .
When called it like this
spin:constraint [ a gp:DescribeInstancesTemplate ;
gp:type owl:Ontology
] ;
I get the query I want (using the TemplateCall.getQueryString() method):
DESCRIBE ?instance
WHERE
{ { SELECT ?instance
WHERE
{ ?instance <http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<http://www.w3.org/2002/07/owl#Ontology> }
}
}
However, if I change the template's query to use spin:text only:
:DescribeInstancesTemplate a spin:Template ;
spin:constraint [ a spl:Argument ;
spl:predicate :type ;
spl:valueType rdfs:Resource
] ;
spin:body [ a sp:Describe, sp:Query ;
sp:text """DESCRIBE ?instance WHERE {
{
SELECT ?instance
WHERE {
?instance a ?type .
}
} .
}"""^^xsd:string ] .
the ?type argument is not set:
DESCRIBE ?instance
WHERE
{ { SELECT ?instance
WHERE
{ ?instance <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> ?type
}
}
}
Is that the expected behaviour or am I missing something? spin:text syntax
is a really nice simplification, but I would expect Template and
TemplateCall to work the same way.
Martynas
graphity.org
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