@prefix dc:     <http://purl.org/dc/elements/1.1/> .
@prefix stock:  <http://example.org/stock#> .
@prefix inv:    <http://example.org/inventory#> .

stock:book1  dc:title  "SPARQL Query Language Tutorial" .
stock:book1  inv:price   10 .
stock:book1  inv:quantity 3 .


stock:book2  dc:title     "SPARQL Query Language (2nd ed)" .
stock:book2  inv:price   20 .
stock:book2  inv:quantity 5 .

stock:book3  dc:title  "Moving from SQL to SPARQL" .
stock:book3  inv:price   5 .
stock:book3  inv:quantity 0 .

stock:book4  dc:title  "Applying XQuery" .
stock:book4  inv:price   20 .
stock:book4  inv:quantity 8 .