@prefix dc:   <http://purl.org/dc/elements/1.1/> .
@prefix :     <http://example.org/book/> .
@prefix ns:   <http://example.org/ns#> .
@prefix xsd:  <http://www.w3.org/2001/XMLSchema#> .

:book1  dc:title  "SPARQL Tutorial" .
:book1  ns:price  "42"^^xsd:integer .
:book2  dc:title  "The Semantic Web" .
:book2  ns:price  "23"^^xsd:integer .