Add support for both full and short NS in the queries.

[farhabihelal]

Currently, we assume short NS is given in the type annotated value of data property. For example: "42"^^xsd:integer. But, in the OWLAPI, actually full IRI given for an OWLLiteral. Thus, we need to add support for values such as "42"^^http://www.w3.org/2001/XMLSchema#integer.