@prefix : <foo://bla/meta#> . @prefix p: <foo://bla/persons/> .
@prefix rdfs: <http://www.w3.org/2000/01/rdf-schema#>.
@prefix xsd: <http://www.w3.org/2001/XMLSchema#>.
:birthdate rdfs:range xsd:date.
p:john a :Person; :name "John"; :age 32;
  :birthdate "1970-12-31"^^xsd:date .
p:alice a :Person; :name "Alice"; :birthdate "2000-01-01"^^xsd:date .