Hello,
If I am querying for a literal of type xsd:string, it appears that in Fuseki I
need to always use ^^xsd:string when querying for that literal.
For example, if I have a triple
<urn:foo:foo> rdfs:label "foo"^^xsd:string
I need to query it using
select * where {
?s ?p "foo"^^xsd:string .
}
and querying without xsd:string won't work:
select * where {
?s ?p "foo" .
}
in other words, "foo" and "foo"^^xsd:string are not equal.
However, I can't find any specific documentation asserting that this is true.
(I have found that in the book "Learning SPARQL" by Bob DuCharme, page 133. it
says that "a quoted value is a string whether you specifically designate it
xsd:string or not"). Can someone clarify what the correct behavior is, and
reference the SPARQL 1.1 spec where this is discussed? Has this behavior ever
changed in SPARQL 1 or 1.1?
On an unrelated note, it appears that SPARQL's ORDER BY provides the order of
the character encoding (ie, case sensitive order, where 'AT' comes before
'add'), not the true alphabetical (case-insensitive) order. Is this by design?
I would think that a common use case would be to provide correct the
alphabetical ordering. Is there a way to get the alphabetical ordering?
Thank you!
