From WikiSTEP
<?xml version="1.0"?>
<!DOCTYPE rdf:RDF [
<!ENTITY xsd "http://www.w3.org/2001/XMLSchema#">
<!ENTITY owl "http://www.w3.org/2002/07/owl#">
<!ENTITY iso31 "http://www.s-ten.net/iso31.owl#">
<!ENTITY iso1000 "http://www.s-ten.net/iso1000.owl#">
]>
<rdf:RDF
xmlns ="&iso31;"
xmlns:iso31 ="&iso31;"
xmlns:iso1000 ="&iso1000;"
xmlns:owl ="http://www.w3.org/2002/07/owl#"
xmlns:rdf ="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
xmlns:rdfs ="http://www.w3.org/2000/01/rdf-schema#"
xmlns:xsd ="http://www.w3.org/2001/XMLSchema#"
xml:base ="http://www.s-ten.net/iso31.owl"
>
<owl:Ontology rdf:about="">
<owl:imports>
<owl:Ontology rdf:about="&iso1000;"/>
</owl:imports>
</owl:Ontology>
<owl:Class rdf:ID="Physical_quantity_type">
<rdfs:subClassOf rdf:resource="&owl;Class"/>
</owl:Class>
<!-- ISO 31-1:1992 Space and time-->
<Physical_quantity_type rdf:about="#Physical_quantity_type_angle">
<rdfs:label xml:lang="en">angle</rdfs:label>
<rdfs:label xml:lang="en">plane angle</rdfs:label>
<rdfs:comment>defined in ISO 31:1:1992</rdfs:comment>
</Physical_quantity_type>
<Physical_quantity_type rdf:about="#Physical_quantity_type_solid_angle">
<rdfs:label xml:lang="en">solid angle</rdfs:label>
<rdfs:comment>defined in ISO 31:1:1992</rdfs:comment>
</Physical_quantity_type>
<Physical_quantity_type rdf:about="#Length">
<rdfs:label xml:lang="en">length</rdfs:label>
<rdfs:comment>defined in ISO 31:1:1992</rdfs:comment>
</Physical_quantity_type>
<Physical_quantity_type rdf:about="#Mass">
<rdfs:label xml:lang="en">mass</rdfs:label>
<rdfs:comment>defined in ISO 31:xxx:1992</rdfs:comment>
</Physical_quantity_type>
<Physical_quantity_type rdf:about="#Physical_quantity_type_curvature">
<rdfs:label xml:lang="en">curvature</rdfs:label>
<rdfs:comment>defined in ISO 31:1:1992</rdfs:comment>
</Physical_quantity_type>
<Physical_quantity_type rdf:about="#Physical_quantity_type_area">
<rdfs:label xml:lang="en">area</rdfs:label>
<rdfs:comment>defined in ISO 31:1:1992</rdfs:comment>
</Physical_quantity_type>
<Physical_quantity_type rdf:about="#Physical_quantity_type_volume">
<rdfs:label xml:lang="en">volume</rdfs:label>
<rdfs:comment>defined in ISO 31:1:1992</rdfs:comment>
</Physical_quantity_type>
<Physical_quantity_type rdf:about="#Physical_quantity_type_time">
<rdfs:label xml:lang="en">time</rdfs:label>
<rdfs:label xml:lang="en">time interval</rdfs:label>
<rdfs:label xml:lang="en">duration</rdfs:label>
<rdfs:comment>defined in ISO 31:1:1992</rdfs:comment>
</Physical_quantity_type>
<Physical_quantity_type rdf:about="#Physical_quantity_type_angular_velocity">
<rdfs:label xml:lang="en">angular_velocity</rdfs:label>
<rdfs:comment>defined in ISO 31:1:1992</rdfs:comment>
</Physical_quantity_type>
<Physical_quantity_type rdf:about="#Physical_quantity_type_angular_acceleration">
<rdfs:label xml:lang="en">angular_acceleration</rdfs:label>
<rdfs:comment>defined in ISO 31:1:1992</rdfs:comment>
</Physical_quantity_type>
<Physical_quantity_type rdf:about="#Physical_quantity_type_velocity">
<rdfs:label xml:lang="en">velocity</rdfs:label>
<rdfs:comment>defined in ISO 31:1:1992</rdfs:comment>
</Physical_quantity_type>
<Physical_quantity_type rdf:about="#Physical_quantity_type_acceleration">
<rdfs:label xml:lang="en">acceleration</rdfs:label>
<rdfs:label xml:lang="de">Beschleunigung</rdfs:label>
<rdfs:comment>defined in ISO 31:1:1992</rdfs:comment>
</Physical_quantity_type>
</rdf:RDF>