Hi William,
let me guess that you are using the SPIN API programmatically? I have
(re)constructed your example in a Turtle file (attached for your
reference) which works fine when run inside of TBC, so I assume you are
executing this differently.
With the API, you need to make that when using spin:_arg1 etc, that your
function's graph includes the SPIN system triples, so that it knows that
spin:_arg1 is indeed a sp:Variable. But it seems that you have already
excluded that possibility. In any case, using named properties from the
arg: namespace is probably a better choice, making the query more
readable. I have done that in the attached copy if you want to try it
out if it makes a difference.
If this does not help, I would need more details of the Java code,
ideally a self-contained scenario.
Thanks
Holger
On 4/9/2014 5:06, William Van Woensel wrote:
Hi,
I can't seem to get a very basic thing right, namely passing
parameters to custom defined functions..
The data:
@prefix rdfs: <http://www.w3.org/2000/01/rdf-schema#> .
@prefix sp: <http://spinrdf.org/sp#> .
@prefix spl: <http://spinrdf.org/spl#> .
@prefix xsd: <http://www.w3.org/2001/XMLSchema#> .
@prefix spin: <http://spinrdf.org/spin#> .
@prefix rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#> .
@prefix impact: <http://www.dal.ca/nichegroup/impactaf#> .
@prefix owl: <http://www.w3.org/2002/07/owl#> .
impact:PatientProfileChart0 impact:hasSystolicBloodPressure
impact:SystolicBloodPressure41 .
impact:SystolicBloodPressure41 impact:hasValue "142.84"^^xsd:double .
impact:SystolicBloodPressure41 rdf:type impact:SystolicBloodPressure .
impact:SystolicBloodPressure41 impact:hasLatestDate
"true"^^xsd:boolean .
impact:hasLatestDate rdf:type rdf:Property .
The rule (attached to the proper class):
impact:SystolicBloodPressure
spin:rule
[ a sp:Construct ;
sp:templates ( [ sp:object impact:HighSystolicBloodPressure ;
sp:predicate impact:hasDSSFinding ;
sp:subject [ sp:varName "p"^^xsd:string ]
] [ sp:object "DiaryHighSystolicBloodPressure" ;
sp:predicate impact:hasTriggeredRule ;
sp:subject impact:HighSystolicBloodPressure
] [ sp:object "Patient's systolic
bloodpressure is uncontrolled" ;
sp:predicate impact:hasLabel ;
sp:subject impact:HighSystolicBloodPressure
] [ sp:object impact:DSSFinding ;
sp:predicate rdf:type ;
sp:subject impact:HighSystolicBloodPressure
] ) ;
sp:where ( [ sp:object [ sp:varName "h"^^xsd:string ] ;
sp:predicate impact:hasSystolicBloodPressure ;
sp:subject [ sp:varName "p"^^xsd:string ]
] [ sp:object [ sp:varName "v"^^xsd:string ] ;
sp:predicate impact:hasValue ;
sp:subject [ sp:varName "h"^^xsd:string ]
] [ a sp:Filter ;
sp:expression [ a impact:latest2 ;
sp:arg1 [ sp:varName
"h"^^xsd:string ]
]
] [ a sp:Filter ;
sp:expression [ a sp:ge ;
sp:arg1 [ sp:varName
"v"^^xsd:string ] ;
sp:arg2 135
]
] )
] .
And finally, the custom function:
impact:latest2 a spin:Function ;
rdfs:comment "Checks whether the given resource is the
'latest' of its type" ;
rdfs:label "latest"^^xsd:string ;
rdfs:subClassOf spin:Functions ;
spin:body [ a sp:Ask ;
sp:where ( [ sp:object
"true"^^xsd:boolean ;
sp:predicate
impact:hasLatestDate ;
sp:subject spin:_arg1
] )
] ;
spin:constraint [ a spl:Argument ;
rdfs:comment "The resource to check
for 'latestness'."^^xsd:string ;
spl:predicate sp:arg1
] .
Nothing is returned, although it should infer some triples. In fact,
when I replace the "spin:_arg1" by the concrete resource
(impact:SystolicBloodPressure41), the triples /are correctly
/inferred. I tried a bunch of things, such as replacing the "[
sp:varName "h"^^xsd:string ]" by spin:_h, the spin:_arg1 by "[
sp:varName "arg1"^^xsd:string ]", etc, but to no avail..
PS: I know the latest function is trivial and can be replaced by a
triple pattern, but the actual function has been simplified for the
purposes of this example.
Any ideas?
Thanks,
William
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# baseURI: http://example.org/unnamed
# imports: http://spinrdf.org/spin
@prefix impact: <http://example.org/unnamed#> .
@prefix owl: <http://www.w3.org/2002/07/owl#> .
@prefix rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#> .
@prefix rdfs: <http://www.w3.org/2000/01/rdf-schema#> .
@prefix sp: <http://spinrdf.org/sp#> .
@prefix spin: <http://spinrdf.org/spin#> .
@prefix spl: <http://spinrdf.org/spl#> .
@prefix xsd: <http://www.w3.org/2001/XMLSchema#> .
<http://example.org/unnamed>
rdf:type owl:Ontology ;
owl:imports <http://spinrdf.org/spin> ;
owl:versionInfo "Created with TopBraid Composer"^^xsd:string ;
.
impact:PatientProfileChart0
impact:hasSystolicBloodPressure impact:SystolicBloodPressure41 ;
.
impact:SystolicBloodPressure
rdf:type owl:Class ;
spin:rule [
rdf:type sp:Construct ;
sp:templates (
[
sp:object impact:HighSystolicBloodPressure ;
sp:predicate impact:hasDSSFinding ;
sp:subject [
sp:varName "p"^^xsd:string ;
] ;
]
[
sp:object "DiaryHighSystolicBloodPressure" ;
sp:predicate impact:hasTriggeredRule ;
sp:subject impact:HighSystolicBloodPressure ;
]
[
sp:object "Patient's systolic bloodpressure is uncontrolled" ;
sp:predicate impact:hasLabel ;
sp:subject impact:HighSystolicBloodPressure ;
]
[
sp:object impact:DSSFinding ;
sp:predicate rdf:type ;
sp:subject impact:HighSystolicBloodPressure ;
]
) ;
sp:where (
[
sp:object [
sp:varName "h"^^xsd:string ;
] ;
sp:predicate impact:hasSystolicBloodPressure ;
sp:subject [
sp:varName "p"^^xsd:string ;
] ;
]
[
sp:object [
sp:varName "v"^^xsd:string ;
] ;
sp:predicate impact:hasValue ;
sp:subject [
sp:varName "h"^^xsd:string ;
] ;
]
[
rdf:type sp:Filter ;
sp:expression [
rdf:type impact:latest2 ;
sp:arg1 [
sp:varName "h"^^xsd:string ;
] ;
] ;
]
[
rdf:type sp:Filter ;
sp:expression [
rdf:type sp:ge ;
sp:arg1 [
sp:varName "v"^^xsd:string ;
] ;
sp:arg2 135 ;
] ;
]
) ;
] ;
.
impact:SystolicBloodPressure41
rdf:type impact:SystolicBloodPressure ;
impact:hasLatestDate "true"^^xsd:boolean ;
impact:hasValue "142.84"^^xsd:double ;
.
impact:hasLatestDate
rdf:type rdf:Property ;
.
impact:latest2
rdf:type spin:Function ;
spin:body [
rdf:type sp:Ask ;
sp:where (
[
sp:object "true"^^xsd:boolean ;
sp:predicate impact:hasLatestDate ;
sp:subject [
sp:varName "systolicBloodPressure"^^xsd:string ;
] ;
]
) ;
] ;
spin:constraint [
rdf:type spl:Argument ;
spl:predicate <http://spinrdf.org/arg#systolicBloodPressure> ;
spl:valueType impact:SystolicBloodPressure ;
] ;
rdfs:comment "Checks whether the given resource is the 'latest' of its type" ;
rdfs:label "latest"^^xsd:string ;
rdfs:subClassOf spin:Functions ;
.
<http://spinrdf.org/arg#systolicBloodPressure>
rdf:type rdf:Property ;
rdfs:subPropertyOf sp:arg ;
.
