@prefix :     <http://rdf.hp.com/> .
@prefix xsd:  <http://www.w3.org/2001/XMLSchema#> . 
@prefix ns:   <http://rdf.hp.com/ns#> .
@prefix rdf:  <http://www.w3.org/1999/02/22-rdf-syntax-ns#> .

:r :p1 "value"@en^^rdf:XMLLiteral .
:r :p2 "value"@en .
:r :p3 "value" .
:r :p4 "value"@en^^ns:someType .