First, I insert 2 triples to Blazegraph 2.1.5:
PREFIX xsd: <http://www.w3.org/2001/XMLSchema#>
insert data {
<http://s> <http://untyped> 'abc' .
<http://s> <http://typed> 'abc'^^xsd:string .
}
Their object has the same value, but in the first triple it's simple (untyped) and in the second it is explicitly typed as xsd:string.
Then, the following query only finds the first triple:
select * where { ?s ?p 'abc' }
And the following query only finds the second triple:
PREFIX xsd: <http://www.w3.org/2001/XMLSchema#>
select * where { ?s ?p 'abc'^^xsd:string }
So Blazegraph distinguishes between 'abc' and 'abc'^^xsd:string. But the SPARQL Specification 1.1 (Section 3.3 Literals) https://www.w3.org/TR/rdf11-concepts/#section-Graph-Literal says the following:
Simple literals are syntactic sugar for abstract syntax literals with the datatype IRI http://www.w3.org/2001/XMLSchema#string
So either Blazegraph violates SPARQL 1.1, or it does not support SPARQL 1.1, or I misinterpret the specification.
Could you please help me figure out what is the correct answer? :)
Some context https://stackoverflow.com/questions/62771044/jena-fuseki-and-blazegraph-behave-differently-with-respect-to-type-strictness
First, I insert 2 triples to Blazegraph 2.1.5:
Their object has the same value, but in the first triple it's simple (untyped) and in the second it is explicitly typed as
xsd:string.Then, the following query only finds the first triple:
And the following query only finds the second triple:
So Blazegraph distinguishes between 'abc' and 'abc'^^xsd:string. But the SPARQL Specification 1.1 (Section 3.3 Literals) https://www.w3.org/TR/rdf11-concepts/#section-Graph-Literal says the following:
So either Blazegraph violates SPARQL 1.1, or it does not support SPARQL 1.1, or I misinterpret the specification.
Could you please help me figure out what is the correct answer? :)
Some context https://stackoverflow.com/questions/62771044/jena-fuseki-and-blazegraph-behave-differently-with-respect-to-type-strictness