Hi Julie,
I assume you want to instantiate sh:SPARQLRule
https://w3c.github.io/shacl/shacl-af/#SPARQLRule
and link a class/shape with that rule using sh:rule. sh:sparql is used
for constraints, not inference rules.
You can see an example of this in the datacube.shapes.ttl file:
qb:ComponentPropertyRuleShape
a sh:NodeShape ;
rdfs:comment "A SHACL rule that can be used to infer additional
triples that copies all values of the sub-properties of
qb:componentProperty into qb:componentProperty itself. This is needed
because many constraints here only reference qb:componentProperty." ;
sh:rule [
a sh:SPARQLRule ;
sh:construct """CONSTRUCT {
?subject qb:componentProperty ?object .
}
WHERE {
?subject qb:attribute|qb:dimension|qb:measure|qb:measureDimension
?object .
}""" ;
sh:order 0 ;
sh:prefixes <http://topbraid.org/datacube> ;
] ;
sh:targetNode sh:this ;
.
and many more in the file owl2shacl.ttl
One area where every newcomer seems to trip over is how to use
sh:prefixes. To get started and keep it simple you may want to just
place them as PREFIX declarations into each rule. Otherwise,
https://www.w3.org/TR/shacl/#sparql-prefixes
Holger
On 2021-11-06 9:52 am, Julie Budaher wrote:
Hi,
Sorry for the basic question , but I am eventually new to this domain.
I am confused about the difference between a sparql query and a sparql
constraint that is added in order to inference new triples. I have
sparql queries that I need to put them in the form of shacl rules in
order to make inference, and when I add the sparql query in sh:sparql,
I am getting an error saying:Error: value must be an instance of
sparql constraint. Can someone explain to me, please, how can I use
these sparql queries as sparql constraints ? Thank you in advance
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