# Base: http://example.org/extension1.owl
@prefix ns1:     <http://example.org/> .
@prefix xs:      <http://www.w3.org/2001/XMLSchema> .
@prefix ns2:     <http://example.org/def/> .
@prefix rdfs:    <http://www.w3.org/2000/01/rdf-schema#> .
@prefix daml:    <http://www.daml.org/2001/03/daml+oil#> .
@prefix rdf:     <http://www.w3.org/1999/02/22-rdf-syntax-ns#> .
@prefix xs_:     <http://www.w3.org/2001/XMLSchema#> .
@prefix :        <#> .
@prefix owl:     <http://www.w3.org/2002/07/owl#> .

<>    a       owl:Ontology .

ns1:foo
      a       owl:DatatypeProperty , rdf:Property ;
      rdfs:range xs_:string .

ns1:FooFoo
      a       owl:Class ;
      owl:intersectionOf ([ a       owl:Restriction ;
                  owl:minCardinality "1"^^xs_:int ;
                  owl:onProperty ns1:foo
                ] [ a       owl:Restriction ;
                  owl:maxCardinality "2"^^xs_:int ;
                  owl:onProperty ns1:foo
                ]) .

ns1:Foo
      a       owl:Class ;
      owl:intersectionOf ([ a       owl:Restriction ;
                  owl:cardinality "1"^^xs_:int ;
                  owl:onProperty ns1:foo
                ]) .