Greetings,
I've been unable to get default values working for spl:Arguments when
used in spin functions and templates under TBC-ME
3.4.0.v20101130-1222R . When no argument is given, the default value
never gets applied. Below is a sample function that applies a default
and a test SPARQL query.
Another note, in spin templates the default value is not applied in
the spin:labelTemplate . This may be another appearance of the same
bug, or a feature that has not been implemented. If the later case, I
would make this a feature request.
thanks,
-Daniel
-------8<------------------------------8<-------------------------------------------
:useDefault
rdf:type spin:Function ;
rdfs:label "use default"^^xsd:string ;
rdfs:subClassOf spin:Functions ;
spin:body
[ rdf:type sp:Select ;
sp:resultVariables (spin:_arg1) ;
sp:where ()
] ;
spin:constraint
[ rdf:type spl:Argument ;
spl:defaultValue "The Default"^^xsd:string ;
spl:optional "true"^^xsd:boolean ;
spl:predicate sp:arg1 ;
spl:valueType xsd:string
] .
-------8<------------------------------8<-------------------------------------------
SELECT ?useArg1 ?useDefault
WHERE {
LET( ?useArg1 := :useDefault("hello") ) .
LET( ?useDefault:= :useDefault() ) .
}
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