semantic web - How to describe a property including inverseOf to an instance in OWL-RDF/XML syntax? -


i have object properties named employ , employedby inverse of each other. how give these properties instance? employ property:

<owl:objectproperty rdf:id="employ">   <rdf:type rdf:resource="http://rdf.pozitron.com/organizations/" />   <rdfs:domain rdf:resource="http://rdf.pozitron.com/organizations/"/>   <rdfs:range rdf:resource="http://rdf.pozitron.com/people/"/> </owl:objectproperty>

my employedby property:

<owl:objectproperty rdf:id="employedby">   <rdf:type rdf:resource="http://rdf.pozitron.com/people/" />   <owl:inverseof rdf:resource="#employ" />   <rdfs:domain rdf:resource="http://rdf.pozitron.com/people/"/>   <rdfs:range rdf:resource="http://rdf.pozitron.com/organizations/"/> </owl:objectproperty>

now how describe employ , employedby in instance? assume pozitron employs john , john employed pozitron.

<rdf:description rdf:about="http://rdf.pozitron.com/people/john">   <rdf:type rdf:resource="http://rdf.pozitron.com/people/"/>   <person:personname>john</person:personname>   <organization:organizationname>pozitron</organization:organizationname> </rdf:description>

it's easier author rdf in syntax turtle rdf/xml. data you've provided isn't enough work (e.g., base uri undefined). here's complete rdf/xml document data (note ex namespace):

<rdf:rdf     xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"     xmlns:owl="http://www.w3.org/2002/07/owl#"     xmlns:rdfs="http://www.w3.org/2000/01/rdf-schema#"     xmlns:person="http://rdf.pozitron.com/people/"     xmlns:organization="http://rdf.pozitron.com/organizations/"     xml:base="http://example.org/"     xmlns:ex="http://example.org/#">   <owl:objectproperty rdf:id="employ">     <rdf:type rdf:resource="http://rdf.pozitron.com/organizations/" />     <rdfs:domain rdf:resource="http://rdf.pozitron.com/organizations/"/>     <rdfs:range rdf:resource="http://rdf.pozitron.com/people/"/>   </owl:objectproperty>   <owl:objectproperty rdf:id="employedby">     <rdf:type rdf:resource="http://rdf.pozitron.com/people/" />     <owl:inverseof rdf:resource="#employ" />     <rdfs:domain rdf:resource="http://rdf.pozitron.com/people/"/>     <rdfs:range rdf:resource="http://rdf.pozitron.com/organizations/"/>   </owl:objectproperty>   <rdf:description rdf:about="http://rdf.pozitron.com/people/john">     <rdf:type rdf:resource="http://rdf.pozitron.com/people/"/>     <person:personname>john</person:personname>     <organization:organizationname>pozitron</organization:organizationname>   </rdf:description> </rdf:rdf>

in turtle, following, , several problems revealed:

@prefix rdfs:    <http://www.w3.org/2000/01/rdf-schema#> . @prefix ex:      <http://example.org/#> . @prefix person:  <http://rdf.pozitron.com/people/> . @prefix organization:  <http://rdf.pozitron.com/organizations/> . @prefix owl:     <http://www.w3.org/2002/07/owl#> . @prefix rdf:     <http://www.w3.org/1999/02/22-rdf-syntax-ns#> .  ex:employedby             person: , owl:objectproperty ;       rdfs:domain person: ;       rdfs:range organization: ;       owl:inverseof ex:employ .  person:john             person: ;       organization:organizationname               "pozitron" ;       person:personname "john" .  ex:employ             owl:objectproperty , organization: ;       rdfs:domain organization: ;       rdfs:range person: .

the problems here that:

  • employedby's inverse employ, there's no property name, employ;
  • the property employ organization
  • the property employedby person
  • john has organizationname
  • there no organization pozitron.

these easy fix in syntax. can add triples john employedby pozitron , pozitron employ john while we're doing this. end with:

@prefix rdfs:    <http://www.w3.org/2000/01/rdf-schema#> . @prefix ex:      <http://example.org/#> . @prefix person:  <http://rdf.pozitron.com/people/> . @prefix organization:  <http://rdf.pozitron.com/organizations/> . @prefix owl:     <http://www.w3.org/2002/07/owl#> . @prefix rdf:     <http://www.w3.org/1999/02/22-rdf-syntax-ns#> .  ex:employedby             owl:objectproperty ;       rdfs:domain person: ;       rdfs:range organization: ;       owl:inverseof ex:employ .  organization:pozitron             organization: ;       organization:organizationname               "pozitron" ;       ex:employ person:john .  person:john             person: ;       person:personname "john" ;       ex:employedby organization:pozitron .  ex:employ             owl:objectproperty ;       rdfs:domain organization: ;       rdfs:range person: .

we can see looks in rdf/xml converting back:

<rdf:rdf     xmlns:ex="http://example.org/#"     xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"     xmlns:owl="http://www.w3.org/2002/07/owl#"     xmlns:person="http://rdf.pozitron.com/people/"     xmlns:organization="http://rdf.pozitron.com/organizations/"     xmlns:rdfs="http://www.w3.org/2000/01/rdf-schema#" >    <rdf:description rdf:about="http://example.org/#employedby">     <rdf:type rdf:resource="http://www.w3.org/2002/07/owl#objectproperty"/>     <rdfs:domain rdf:resource="http://rdf.pozitron.com/people/"/>     <rdfs:range rdf:resource="http://rdf.pozitron.com/organizations/"/>     <owl:inverseof rdf:resource="http://example.org/#employ"/>   </rdf:description>   <rdf:description rdf:about="http://rdf.pozitron.com/organizations/pozitron">     <rdf:type rdf:resource="http://rdf.pozitron.com/organizations/"/>     <organization:organizationname>pozitron</organization:organizationname>     <ex:employ rdf:resource="http://rdf.pozitron.com/people/john"/>   </rdf:description>   <rdf:description rdf:about="http://rdf.pozitron.com/people/john">     <rdf:type rdf:resource="http://rdf.pozitron.com/people/"/>     <person:personname>john</person:personname>     <ex:employedby rdf:resource="http://rdf.pozitron.com/organizations/pozitron"/>   </rdf:description>   <rdf:description rdf:about="http://example.org/#employ">     <rdf:type rdf:resource="http://www.w3.org/2002/07/owl#objectproperty"/>     <rdfs:domain rdf:resource="http://rdf.pozitron.com/organizations/"/>     <rdfs:range rdf:resource="http://rdf.pozitron.com/people/"/>   </rdf:description> </rdf:rdf>

if you're using owl reasoner can handle inverse properties, don't need write both john employedby pozitron and pozitron employ john; can write 1 , reasoner infer other.


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