@prefix  xsd:    <http://www.w3.org/2001/XMLSchema#> .
@prefix  :       <http://example.org/> .

:x :p1 "true"^^xsd:boolean .

:x :p2 "false"^^xsd:boolean .

:x :p3 "Other" .
:x :p4 "" .

:x :p5 "1"^^xsd:integer .
:x :p6 "0"^^xsd:integer .

:x :q "unknown"^^:type .
