<?xml version='1.0' encoding='ISO-8859-1'?>
<!DOCTYPE rdf:RDF [
	 <!ENTITY daml 'http://www.daml.org/2001/03/daml+oil#'>
	 <!ENTITY xsd 'http://www.w3.org/2000/10/XMLSchema#'>  
]>

<rdf:RDF
  xmlns:rdf ="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
  xmlns:rdfs="http://www.w3.org/2000/01/rdf-schema#"
  xmlns:daml="&daml;"
>

<daml:Ontology rdf:about="">
  <daml:versionInfo>$Id: units-ont.daml,v 1.2 2002/10/22 05:33:35 mdean Exp $</daml:versionInfo>
  <rdfs:comment>GNU Units Ontology</rdfs:comment>
</daml:Ontology>

<rdfs:Class rdf:ID="Unit">
  <rdfs:subClassOf rdf:resource="#Factor"/>
  <rdfs:subClassOf>
    <daml:Restriction>
      <daml:onProperty rdf:resource="#multiply"/>
      <daml:toClass rdf:resource="#Factor"/>
    </daml:Restriction>
  </rdfs:subClassOf>
  <rdfs:subClassOf>
    <daml:Restriction>
      <daml:onProperty rdf:resource="#divide"/>
      <daml:toClass rdf:resource="#Factor"/>
    </daml:Restriction>
  </rdfs:subClassOf>
</rdfs:Class>

<rdfs:Class rdf:ID="PrimitiveUnit">
  <rdfs:subClassOf rdf:resource="#Unit"/>
</rdfs:Class>

<rdfs:Class rdf:ID="Prefix">
  <rdfs:subClassOf>
    <daml:Restriction>
      <daml:onProperty rdf:resource="#factor"/>
      <daml:toClass rdf:resource="&xsd;double"/>
    </daml:Restriction>
  </rdfs:subClassOf>
  <rdfs:subClassOf>
    <daml:Restriction>
      <daml:onProperty rdf:resource="#prefix"/>
      <daml:toClass rdf:resource="#Prefix"/>
    </daml:Restriction>
  </rdfs:subClassOf>
</rdfs:Class>

<rdfs:Class rdf:ID="Factor"/>

<rdfs:Class rdf:ID="Constant">
  <rdfs:subClassOf rdf:resource="#Factor"/>
  <rdfs:subClassOf>
    <daml:Restriction>
      <daml:onProperty rdf:resource="#value"/>
      <daml:toClass rdf:resource="&xsd;double"/>
    </daml:Restriction>
  </rdfs:subClassOf>
</rdfs:Class>

<daml:ObjectProperty rdf:ID="divide"/>
<daml:DatatypeProperty rdf:ID="factor"/>
<daml:ObjectProperty rdf:ID="multiply"/>
<daml:ObjectProperty rdf:ID="prefix"/>
<daml:DatatypeProperty rdf:ID="value"/>

</rdf:RDF>
