Owl:InverseFunctionalProperty

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Defines a Attribute for two different objects that can't have the same value. Ie. a social security number is assigned to only one person only.

<owl:ObjectProperty rdf:ID="has social security number">
  <rdf:type    rdf:resource="&owl;InverseFunctionalProperty" />
  <rdfs:domain rdf:resource="#Person" />
  <rdfs:range  rdf:resource="#SocialSecurityNumber" />
</owl:ObjectProperty>

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