OK the documentation is not exhaustive... The 1-argument
createTypedLiteral() attempts to infer the RDF datatype from Java
type, where 'objectDataValue' is a String I'm guessing? Which becomes
xsd:string.
If you want to override this with an explicit datatype URI, you need
the 2-argument version:
https://jena.apache.org/documentation/javadoc/jena/org.apache.jena.core/org/apache/jena/rdf/model/Model.html#createTypedLiteral(java.lang.String,org.apache.jena.datatypes.RDFDatatype)
On Thu, Oct 26, 2023 at 12:55 PM Steve Vestal <steve.ves...@galois.com> wrote:
>
> Literal dataLiteral = resultGraph.createTypedLiteral(objectDataValue);
> System.err.println("objectLiteral: " + objectDataValue + " " +
> dataLiteral.getDatatypeURI());
>
> always says type is http://www.w3.org/2001/XMLSchema#string
>
>
> On 10/26/2023 5:26 AM, Martynas Jusevičius wrote:
> > You need Model::createTypedLiteral
> > https://jena.apache.org/documentation/notes/typed-literals.html#basic-api-operations
> >
> > On Thu, 26 Oct 2023 at 12.24, Steve Vestal <steve.ves...@galois.com> wrote:
> >
> >> If I reconstruct using
> >>
> >> Literal dataLiteral = resultGraph.createLiteral(objectDataValue);
> >>
> >> it always says the type is string
> >>
> >> 1^^xsd:string
> >> stringB^^ xsd:string
> >> 123.456^^xsd:string
> >> 2023-10-06T12:05:10Z^^xsd:string
> >>
> >> On 10/26/2023 4:17 AM, 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.
> >>>
> >>> 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
> >>>
> >>> What is a good way to reconstruct a typed Literal from the query
> >>> results? 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?
> >>>
> >>>
