On 26/10/2023 10:17, Steve Vestal wrote:
What is the best way to reconstruct a typed Literal from a SPARQL SELECT
result?
I have a SPARQL SELECT query issued against an OntModel in this way:
QueryExecution structureRowsExec =
QueryExecutionFactory.create(structureRowsQuery, owlOntModel);
Here are some example triples in the query:
?a2
<http://www.galois.com/indigo/test/structure_datatypes_test#floatProperty> ?dataVar1.
?a2
<http://www.galois.com/indigo/test/structure_datatypes_test#dateTimeProperty> ?dataVar2.
Query results come back as the right RDF term kind.
The OntModel being queried was created using typed literals, e.g.,
DataPropertyAssertion( struct:floatProperty struct:indivA2
"123.456"^^xsd:float )
DataPropertyAssertion( struct:dateTimeProperty struct:indivA2
"2023-10-06T12:05:10Z"^^xsd:dateTime )
When I look at the ?dataVar1 and ?dataVar2 results in a row, I get
things like:
1
stringB
123.456
2023-10-06T12:05:10Z
Are those are just the toString() presentation?
Or is your query returning strings?
What is a good way to reconstruct a typed Literal from the query
results?
RDFNode is the class for all RDF term types.
QuerySolution.get
and if you know they are literals:
QuerySolution.getLiteral
Is there a SPARQL option to show full typed literal strings?
Something that can be added to the query? A utility method that can
identify the XSD schema simple data type when given a result value string?
