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

# numeric data
:n0 :p 1 .
:n1 :p 0 ; :q 0 .
:n2 :p 0 ; :q 2 .
:n3 :p 4 ; :q 2 .