@prefix rdf: . @prefix foaf: . @prefix dctype: . @prefix rel: . @prefix dct: . @prefix dc: . @prefix rdfs: . @prefix owl: . @prefix ns0: . @prefix vann: . @prefix skos: . @prefix ov: . @prefix ns1: . @prefix ns2: . rdf:type foaf:Document , dctype:Text ; foaf:primaryTopic rel:engagedTo ; dct:hasFormat , , ; foaf:topic rel:engagedTo . rdf:type dctype:Text , foaf:Document ; dc:format "application/rdf+xml" ; rdfs:label "RDF/XML" . rdf:type dctype:Text , foaf:Document ; dc:format "text/html" ; rdfs:label "HTML" . rdf:type dctype:Text , foaf:Document ; dc:format "application/json" ; rdfs:label "JSON" . rdf:type owl:Ontology ; dc:creator ns0:me , _:mor519f8db592a8f ; dc:title "RELATIONSHIP: A vocabulary for describing relationships between people" ; dc:description "A vocabulary for describing relationships between people" ; dc:identifier "http://purl.org/vocab/relationship/rel-vocab-20050810" ; dct:isVersionOf ; dct:replaces rel:rel-vocab-20090515 ; vann:preferredNamespaceUri "http://purl.org/vocab/relationship" ; vann:preferredNamespacePrefix "rel" ; vann:example , ; dct:issued "2004-02-11" ; skos:changeNote _:mor519f8db592b25 , _:mor519f8db592c91 ; skos:historyNote _:mor519f8db592b81 , _:mor519f8db592bd9 , _:mor519f8db592c36 ; ov:discussionList ns1:foaf-dev . ns0:me rdf:type foaf:Person ; foaf:name "Ian Davis" . _:mor519f8db592a8f rdf:type foaf:Person ; foaf:name "Eric Vitiello Jr" . _:mor519f8db592b25 rdf:value "Added isDefinedBy properties and updated documentation" ; dc:date "2005-08-10" ; dc:creator "Ian Davis" . _:mor519f8db592b81 rdf:value "Typed vocabulary as owl:Ontology" ; dc:date "2009-05-15" ; dc:creator "Ian Davis" . _:mor519f8db592bd9 rdf:value "Incorporated changes suggested by Henry Story on foaf-dev list" ; dc:date "2010-02-09" ; dc:creator "Ian Davis" . _:mor519f8db592c36 rdf:value "Asserted that foaf:knows is rdfs:subPropertyOf rel:knowsOf" ; dc:date "2010-02-09" ; dc:creator "Ian Davis" . _:mor519f8db592c91 rdf:value "Inlined the examples that had been orphaned by publishing software changes" ; dc:date "2010-04-19" ; dc:creator "Ian Davis" . ns1:foaf-dev rdfs:label "FOAF-DEV mailing list" . foaf:knows rdfs:subPropertyOf rel:knowsOf . rel:friendOf rdf:type owl:SymmetricProperty ; owl:equivalentClass ns2:friendOf ; rdfs:subPropertyOf foaf:knows , owl:differentFrom ; rdfs:label "Friend Of"@en ; skos:definition "A person who shares mutual friendship with this person."@en ; rdfs:domain foaf:Person ; rdfs:range foaf:Person ; rdfs:isDefinedBy ; skos:historyNote _:mor519f8db592d35 . _:mor519f8db592d35 rdf:value "Asserted that this property is a sub-property of owl:differentFrom, indicating that this is a relationship between different individuals" ; dc:date "2010-02-09" ; dc:creator "Ian Davis" . rel:acquaintanceOf rdf:type owl:SymmetricProperty ; owl:equivalentClass ns2:acquaintanceOf ; rdfs:subPropertyOf foaf:knows , owl:differentFrom ; rdfs:label "Acquaintance Of"@en ; skos:definition "A person having more than slight or superficial knowledge of this person but short of friendship."@en ; rdfs:domain foaf:Person ; rdfs:range foaf:Person ; rdfs:isDefinedBy ; skos:historyNote _:mor519f8db592dbb . _:mor519f8db592dbb rdf:value "Asserted that this property is a sub-property of owl:differentFrom, indicating that this is a relationship between different individuals" ; dc:date "2010-02-09" ; dc:creator "Ian Davis" . rel:parentOf rdf:type rdf:Property ; owl:equivalentClass ns2:parentOf ; owl:inverseOf rel:childOf ; rdfs:subPropertyOf foaf:knows , owl:differentFrom ; rdfs:label "Parent Of"@en ; skos:definition "A person who has given birth to or nurtured and raised this person."@en ; rdfs:domain foaf:Person ; rdfs:range foaf:Person ; rdfs:isDefinedBy ; skos:historyNote _:mor519f8db592e43 . _:mor519f8db592e43 rdf:value "Asserted that this property is a sub-property of owl:differentFrom, indicating that this is a relationship between different individuals" ; dc:date "2010-02-09" ; dc:creator "Ian Davis" . rel:siblingOf rdf:type owl:SymmetricProperty ; owl:equivalentClass ns2:siblingOf ; rdfs:subPropertyOf foaf:knows , owl:differentFrom ; rdfs:label "Sibling Of"@en ; skos:definition "A person having one or both parents in common with this person."@en ; rdfs:domain foaf:Person ; rdfs:range foaf:Person ; rdfs:isDefinedBy ; skos:historyNote _:mor519f8db592ec7 . _:mor519f8db592ec7 rdf:value "Asserted that this property is a sub-property of owl:differentFrom, indicating that this is a relationship between different individuals" ; dc:date "2010-02-09" ; dc:creator "Ian Davis" . rel:childOf rdf:type rdf:Property ; owl:equivalentClass ns2:childOf ; owl:inverseOf rel:parentOf ; rdfs:subPropertyOf foaf:knows , owl:differentFrom ; rdfs:label "Child Of"@en ; skos:definition "A person who was given birth to or nurtured and raised by this person."@en ; rdfs:domain foaf:Person ; rdfs:range foaf:Person ; rdfs:isDefinedBy ; skos:historyNote _:mor519f8db592f63 . _:mor519f8db592f63 rdf:value "Asserted that this property is a sub-property of owl:differentFrom, indicating that this is a relationship between different individuals" ; dc:date "2010-02-09" ; dc:creator "Ian Davis" . rel:grandchildOf rdf:type rdf:Property ; owl:equivalentClass ns2:grandchildOf ; owl:inverseOf rel:grandparentOf ; rdfs:subPropertyOf foaf:knows , owl:differentFrom ; rdfs:label "Grandchild Of"@en , "Grandchild Of" ; skos:definition "A person who is a child of any of this person's children."@en ; rdfs:domain foaf:Person ; rdfs:range foaf:Person ; rdfs:isDefinedBy ; skos:historyNote _:mor519f8db592fe9 . _:mor519f8db592fe9 rdf:value "Asserted that this property is a sub-property of owl:differentFrom, indicating that this is a relationship between different individuals" ; dc:date "2010-02-09" ; dc:creator "Ian Davis" . rel:spouseOf rdf:type owl:SymmetricProperty ; owl:equivalentClass ns2:spouseOf ; rdfs:subPropertyOf foaf:knows , owl:differentFrom ; rdfs:label "Spouse Of"@en ; skos:definition "A person who is married to this person"@en ; rdfs:range foaf:Person ; rdfs:isDefinedBy ; skos:historyNote _:mor519f8db59306b . _:mor519f8db59306b rdf:value "Asserted that this property is a sub-property of owl:differentFrom, indicating that this is a relationship between different individuals" ; dc:date "2010-02-09" ; dc:creator "Ian Davis" . rel:enemyOf rdf:type rdf:Property ; owl:equivalentClass ns2:enemyOf ; rdfs:subPropertyOf foaf:knows , owl:differentFrom ; rdfs:label "Enemy Of"@en ; skos:definition "A person towards whom this person feels hatred, intends injury to, or opposes the interests of."@en ; rdfs:domain foaf:Person ; rdfs:range foaf:Person ; rdfs:isDefinedBy ; skos:historyNote _:mor519f8db5930f7 . _:mor519f8db5930f7 rdf:value "Asserted that this property is a sub-property of owl:differentFrom, indicating that this is a relationship between different individuals" ; dc:date "2010-02-09" ; dc:creator "Ian Davis" . rel:antagonistOf rdf:type rdf:Property ; owl:equivalentClass ns2:antagonistOf ; rdfs:subPropertyOf foaf:knows , owl:differentFrom ; rdfs:label "Antagonist Of"@en ; skos:definition "A person who opposes and contends against this person."@en ; rdfs:domain foaf:Person ; rdfs:range foaf:Person ; rdfs:isDefinedBy ; skos:historyNote _:mor519f8db59317b . _:mor519f8db59317b rdf:value "Asserted that this property is a sub-property of owl:differentFrom, indicating that this is a relationship between different individuals" ; dc:date "2010-02-09" ; dc:creator "Ian Davis" . rel:ambivalentOf rdf:type rdf:Property ; owl:equivalentClass ns2:ambivalentOf ; rdfs:label "Ambivalent Of"@en ; skos:definition "A person towards whom this person has mixed feelings or emotions."@en ; rdfs:domain foaf:Person ; rdfs:range foaf:Person ; rdfs:isDefinedBy ; skos:historyNote _:mor519f8db5931fc , _:mor519f8db59325a ; rdfs:subPropertyOf owl:differentFrom . _:mor519f8db5931fc rdf:value "Removed assertion that this property is a sub-property of foaf:knows due to reciprocity requirements. It is possible for one to be ambivalent of another without that person knowing the first." ; dc:date "2010-02-09" ; dc:creator "Ian Davis" . _:mor519f8db59325a rdf:value "Asserted that this property is a sub-property of owl:differentFrom, indicating that this is a relationship between different individuals" ; dc:date "2010-02-09" ; dc:creator "Ian Davis" . rel:lostContactWith rdf:type owl:SymmetricProperty ; rdfs:subPropertyOf foaf:knows , owl:differentFrom ; rdfs:label "Lost Contact With"@en ; skos:definition "A person who was once known by this person but has subsequently become uncontactable."@en ; rdfs:domain foaf:Person ; rdfs:range foaf:Person ; rdfs:isDefinedBy ; skos:historyNote _:mor519f8db5932e0 . _:mor519f8db5932e0 rdf:value "Asserted that this property is a sub-property of owl:differentFrom, indicating that this is a relationship between different individuals" ; dc:date "2010-02-09" ; dc:creator "Ian Davis" . rel:knowsOf rdf:type rdf:Property ; rdfs:label "Knows Of"@en ; skos:definition "A person who has come to be known to this person through their actions or position."@en ; rdfs:domain foaf:Person ; rdfs:range foaf:Person ; rdfs:isDefinedBy ; skos:historyNote _:mor519f8db593366 , _:mor519f8db5933c6 , _:mor519f8db593426 ; rdfs:subPropertyOf owl:differentFrom . _:mor519f8db593366 rdf:value "Removed assertion that this property is a sub-property of foaf:knows due to reciprocity requirements. It is possible for one to know of another without that person knowing the first." ; dc:date "2010-02-09" ; dc:creator "Ian Davis" . _:mor519f8db5933c6 rdf:value "Assert that foaf:knows is rdfs:subPropertyOf rel:knowsOf" ; dc:date "2010-02-09" ; dc:creator "Ian Davis" . _:mor519f8db593426 rdf:value "Asserted that this property is a sub-property of owl:differentFrom, indicating that this is a relationship between different individuals" ; dc:date "2010-02-09" ; dc:creator "Ian Davis" . rel:wouldLikeToKnow rdf:type rdf:Property ; rdfs:label "Would Like To Know"@en ; skos:definition "A person whom this person would desire to know more closely."@en ; rdfs:domain foaf:Person ; rdfs:range foaf:Person ; rdfs:isDefinedBy ; skos:historyNote _:mor519f8db5934a7 , _:mor519f8db593505 ; rdfs:subPropertyOf owl:differentFrom . _:mor519f8db5934a7 rdf:value "Removed assertion that this property is a sub-property of foaf:knows which would imply that the two people already know one another." ; dc:date "2010-02-09" ; dc:creator "Ian Davis" . _:mor519f8db593505 rdf:value "Asserted that this property is a sub-property of owl:differentFrom, indicating that this is a relationship between different individuals" ; dc:date "2010-02-09" ; dc:creator "Ian Davis" . rel:knowsInPassing rdf:type rdf:Property ; rdfs:subPropertyOf foaf:knows , owl:differentFrom ; rdfs:label "Knows In Passing"@en ; skos:definition "A person whom this person has slight or superficial knowledge of."@en ; rdfs:domain foaf:Person ; rdfs:range foaf:Person ; rdfs:isDefinedBy ; skos:historyNote _:mor519f8db59358b . _:mor519f8db59358b rdf:value "Asserted that this property is a sub-property of owl:differentFrom, indicating that this is a relationship between different individuals" ; dc:date "2010-02-09" ; dc:creator "Ian Davis" . rel:knowsByReputation rdf:type rdf:Property ; rdfs:label "Knows By Reputation"@en ; skos:definition "A person known by this person primarily for a particular action, position or field of endeavour."@en ; rdfs:domain foaf:Person ; rdfs:range foaf:Person ; rdfs:isDefinedBy ; skos:historyNote _:mor519f8db59360a , _:mor519f8db593668 ; rdfs:subPropertyOf owl:differentFrom . _:mor519f8db59360a rdf:value "Removed assertion that this property is a sub-property of foaf:knows due to reciprocity requirements. It is possible for one to know of another by reputation without that person knowing the first." ; dc:date "2010-02-09" ; dc:creator "Ian Davis" . _:mor519f8db593668 rdf:value "Asserted that this property is a sub-property of owl:differentFrom, indicating that this is a relationship between different individuals" ; dc:date "2010-02-09" ; dc:creator "Ian Davis" . rel:closeFriendOf rdf:type owl:SymmetricProperty ; rdfs:subPropertyOf foaf:knows , owl:differentFrom ; rdfs:label "Close Friend Of"@en ; skos:definition "A person who shares a close mutual friendship with this person."@en ; rdfs:domain foaf:Person ; rdfs:range foaf:Person ; rdfs:isDefinedBy ; skos:historyNote _:mor519f8db5936ef . _:mor519f8db5936ef rdf:value "Asserted that this property is a sub-property of owl:differentFrom, indicating that this is a relationship between different individuals" ; dc:date "2010-02-09" ; dc:creator "Ian Davis" . rel:hasMet rdf:type owl:SymmetricProperty ; rdfs:subPropertyOf foaf:knows , owl:differentFrom ; rdfs:label "Has Met"@en ; skos:definition "A person who has met this person whether in passing or longer."@en ; rdfs:domain foaf:Person ; rdfs:range foaf:Person ; rdfs:isDefinedBy ; skos:historyNote _:mor519f8db593771 . _:mor519f8db593771 rdf:value "Asserted that this property is a sub-property of owl:differentFrom, indicating that this is a relationship between different individuals" ; dc:date "2010-02-09" ; dc:creator "Ian Davis" . rel:worksWith rdf:type owl:SymmetricProperty ; rdfs:subPropertyOf foaf:knows , owl:differentFrom ; rdfs:label "Works With"@en ; skos:definition "A person who works for the same employer as this person."@en ; rdfs:domain foaf:Person ; rdfs:range foaf:Person ; rdfs:isDefinedBy ; skos:historyNote _:mor519f8db5937db , _:mor519f8db593837 . _:mor519f8db5937db rdf:value "Removed assertion that this property is transitive." ; dc:date "2010-02-09" ; dc:creator "Ian Davis" . _:mor519f8db593837 rdf:value "Asserted that this property is a sub-property of owl:differentFrom, indicating that this is a relationship between different individuals" ; dc:date "2010-02-09" ; dc:creator "Ian Davis" . rel:colleagueOf rdf:type owl:SymmetricProperty ; rdfs:subPropertyOf foaf:knows , owl:differentFrom ; rdfs:label "Colleague Of"@en ; skos:definition "A person who is a member of the same profession as this person."@en ; rdfs:domain foaf:Person ; rdfs:range foaf:Person ; rdfs:isDefinedBy ; skos:historyNote _:mor519f8db5938bf . _:mor519f8db5938bf rdf:value "Asserted that this property is a sub-property of owl:differentFrom, indicating that this is a relationship between different individuals" ; dc:date "2010-02-09" ; dc:creator "Ian Davis" . rel:collaboratesWith rdf:type owl:SymmetricProperty ; rdfs:subPropertyOf foaf:knows , owl:differentFrom ; rdfs:label "Collaborates With"@en ; skos:definition "A person who works towards a common goal with this person."@en ; rdfs:domain foaf:Person ; rdfs:range foaf:Person ; rdfs:isDefinedBy ; skos:historyNote _:mor519f8db593942 . _:mor519f8db593942 rdf:value "Asserted that this property is a sub-property of owl:differentFrom, indicating that this is a relationship between different individuals" ; dc:date "2010-02-09" ; dc:creator "Ian Davis" . rel:employerOf rdf:type rdf:Property ; owl:inverseOf rel:employedBy ; rdfs:subPropertyOf foaf:knows , owl:differentFrom ; rdfs:label "Employer Of"@en ; skos:definition "A person who engages the services of this person."@en ; rdfs:domain foaf:Person ; rdfs:range foaf:Person ; rdfs:isDefinedBy ; skos:historyNote _:mor519f8db5939c6 . _:mor519f8db5939c6 rdf:value "Asserted that this property is a sub-property of owl:differentFrom, indicating that this is a relationship between different individuals" ; dc:date "2010-02-09" ; dc:creator "Ian Davis" . rel:employedBy rdf:type rdf:Property ; owl:inverseOf rel:employerOf ; rdfs:subPropertyOf foaf:knows , owl:differentFrom ; rdfs:label "Employed By"@en ; skos:definition "A person for whom this person's services have been engaged."@en ; rdfs:domain foaf:Person ; rdfs:range foaf:Person ; rdfs:isDefinedBy ; skos:historyNote _:mor519f8db593a4c . _:mor519f8db593a4c rdf:value "Asserted that this property is a sub-property of owl:differentFrom, indicating that this is a relationship between different individuals" ; dc:date "2010-02-09" ; dc:creator "Ian Davis" . rel:mentorOf rdf:type rdf:Property ; owl:inverseOf rel:apprenticeTo ; rdfs:subPropertyOf foaf:knows , owl:differentFrom ; rdfs:label "Mentor Of"@en ; skos:definition "A person who serves as a trusted counselor or teacher to this person."@en ; rdfs:domain foaf:Person ; rdfs:range foaf:Person ; rdfs:isDefinedBy ; skos:historyNote _:mor519f8db593ad2 . _:mor519f8db593ad2 rdf:value "Asserted that this property is a sub-property of owl:differentFrom, indicating that this is a relationship between different individuals" ; dc:date "2010-02-09" ; dc:creator "Ian Davis" . rel:apprenticeTo rdf:type rdf:Property ; owl:inverseOf rel:mentorOf ; rdfs:subPropertyOf foaf:knows , owl:differentFrom ; rdfs:label "Apprentice To"@en ; skos:definition "A person to whom this person serves as a trusted counselor or teacher."@en ; rdfs:domain foaf:Person ; rdfs:range foaf:Person ; rdfs:isDefinedBy ; skos:historyNote _:mor519f8db593b56 . _:mor519f8db593b56 rdf:value "Asserted that this property is a sub-property of owl:differentFrom, indicating that this is a relationship between different individuals" ; dc:date "2010-02-09" ; dc:creator "Ian Davis" . rel:livesWith rdf:type owl:SymmetricProperty , owl:TransitiveProperty ; rdfs:isDefinedBy ; rdfs:subPropertyOf foaf:knows , owl:differentFrom ; rdfs:label "Lives With"@en ; skos:definition "A person who shares a residence with this person."@en ; rdfs:domain foaf:Person ; rdfs:range foaf:Person ; skos:historyNote _:mor519f8db593bdd . _:mor519f8db593bdd rdf:value "Asserted that this property is a sub-property of owl:differentFrom, indicating that this is a relationship between different individuals" ; dc:date "2010-02-09" ; dc:creator "Ian Davis" . rel:neighborOf rdf:type owl:SymmetricProperty ; rdfs:subPropertyOf foaf:knows , owl:differentFrom ; rdfs:label "Neighbor Of"@en ; skos:definition "A person who lives in the same locality as this person."@en ; rdfs:domain foaf:Person ; rdfs:range foaf:Person ; rdfs:isDefinedBy ; skos:historyNote _:mor519f8db593c58 , _:mor519f8db593cb2 . _:mor519f8db593c58 rdf:value "Asserted that this property is a sub-property of owl:differentFrom, indicating that this is a relationship between different individuals" ; dc:date "2010-02-09" ; dc:creator "Ian Davis" . _:mor519f8db593cb2 rdf:value "Removed assertion that this property is transitive." ; dc:date "2010-02-09" ; dc:creator "Ian Davis" . rel:grandparentOf rdf:type rdf:Property ; owl:inverseOf rel:grandchildOf ; rdfs:subPropertyOf foaf:knows , owl:differentFrom ; rdfs:label "Grandparent Of"@en ; skos:definition "A person who is the parent of any of this person's parents."@en ; rdfs:domain foaf:Person ; rdfs:range foaf:Person ; rdfs:isDefinedBy ; skos:historyNote _:mor519f8db593d40 . _:mor519f8db593d40 rdf:value "Asserted that this property is a sub-property of owl:differentFrom, indicating that this is a relationship between different individuals" ; dc:date "2010-02-09" ; dc:creator "Ian Davis" . rel:lifePartnerOf rdf:type owl:SymmetricProperty ; rdfs:subPropertyOf foaf:knows , owl:differentFrom ; rdfs:label "Life Partner of"@en ; skos:definition "A person who has made a long-term commitment to this person's."@en ; rdfs:domain foaf:Person ; rdfs:range foaf:Person ; rdfs:isDefinedBy ; skos:historyNote _:mor519f8db593dc1 . _:mor519f8db593dc1 rdf:value "Asserted that this property is a sub-property of owl:differentFrom, indicating that this is a relationship between different individuals" ; dc:date "2010-02-09" ; dc:creator "Ian Davis" . rel:engagedTo rdf:type owl:SymmetricProperty ; rdfs:subPropertyOf foaf:knows , owl:differentFrom ; rdfs:label "Engaged To"@en ; skos:definition "A person to whom this person is betrothed."@en ; rdfs:domain foaf:Person ; rdfs:range foaf:Person ; rdfs:isDefinedBy ; skos:historyNote _:mor519f8db593e43 . _:mor519f8db593e43 rdf:value "Asserted that this property is a sub-property of owl:differentFrom, indicating that this is a relationship between different individuals" ; dc:date "2010-02-09" ; dc:creator "Ian Davis" . rel:ancestorOf rdf:type owl:TransitiveProperty ; owl:inverseOf rel:descendantOf ; rdfs:label "Ancestor Of"@en ; skos:definition "A person who is a descendant of this person."@en ; rdfs:domain foaf:Person ; rdfs:range foaf:Person ; rdfs:isDefinedBy ; skos:historyNote _:mor519f8db593ec4 , _:mor519f8db593f23 ; rdfs:subPropertyOf owl:differentFrom . rel:descendantOf rdfs:label "Descendant Of" , "Descendant Of"@en ; rdf:type owl:TransitiveProperty ; owl:inverseOf rel:ancestorOf ; skos:definition "A person from whom this person is descended."@en ; rdfs:domain foaf:Person ; rdfs:range foaf:Person ; rdfs:isDefinedBy ; skos:historyNote _:mor519f8db593fa6 , _:mor519f8db594005 ; rdfs:subPropertyOf owl:differentFrom . _:mor519f8db593ec4 rdf:value "Removed assertion that this property is a sub-property of foaf:knows. foaf:knows requires a reciprocation that may not be possible for distant ancestors." ; dc:date "2010-02-09" ; dc:creator "Ian Davis" . _:mor519f8db593f23 rdf:value "Asserted that this property is a sub-property of owl:differentFrom, indicating that this is a relationship between different individuals" ; dc:date "2010-02-09" ; dc:creator "Ian Davis" . _:mor519f8db593fa6 rdf:value "Removed assertion that this property is a sub-property of foaf:knows. foaf:knows requires a reciprocation that may not be possible for distant descendants." ; dc:date "2010-02-09" ; dc:creator "Ian Davis" . _:mor519f8db594005 rdf:value "Asserted that this property is a sub-property of owl:differentFrom, indicating that this is a relationship between different individuals" ; dc:date "2010-02-09" ; dc:creator "Ian Davis" . rel:Relationship rdf:type rdfs:Class ; rdfs:label "Relationship"@en ; skos:definition "A particular type of connection existing between people related to or having dealings with each other."@en ; rdfs:isDefinedBy . rel:participantIn rdf:type rdf:Property ; rdfs:label "Participant In"@en ; rdfs:domain foaf:Person ; rdfs:range rel:Relationship ; rdfs:isDefinedBy ; skos:historyNote _:mor519f8db59409b . _:mor519f8db59409b rdf:value "Removed assertion that this property is a sub-property of foaf:knows." ; dc:date "2010-02-09" ; dc:creator "Ian Davis" . rel:participant rdf:type rdf:Property ; rdfs:label "Participant"@en ; rdfs:domain rel:Relationship ; rdfs:range foaf:Person ; rdfs:isDefinedBy ; skos:historyNote _:mor519f8db594115 . _:mor519f8db594115 rdf:value "Removed assertion that this property is a sub-property of foaf:knows." ; dc:date "2010-02-09" ; dc:creator "Ian Davis" . rel:influencedBy rdf:type rdf:Property ; rdfs:label "Influenced By"@en ; skos:definition "a person who has influenced this person."@en ; rdfs:domain foaf:Person ; rdfs:range foaf:Person ; rdfs:isDefinedBy ; skos:historyNote _:mor519f8db594193 , _:mor519f8db5941f1 ; rdfs:subPropertyOf owl:differentFrom . _:mor519f8db594193 rdf:value "Removed assertion that this property is a sub-property of foaf:knows due to reciprocity requirements. It is possible for one to be influenced by another by reputation without that person knowing the first." ; dc:date "2010-02-09" ; dc:creator "Ian Davis" . _:mor519f8db5941f1 rdf:value "Asserted that this property is a sub-property of owl:differentFrom, indicating that this is a relationship between different individuals" ; dc:date "2010-02-09" ; dc:creator "Ian Davis" . rdf:type ov:SchemaExample ; rdfs:label "Using With FOAF" ; rdfs:comment '''

The RELATIONSHIP vocabulary can be used without modification with FOAF documents. Simply replace foaf:knows properties with a more specific property from this vocabulary. For backwards compatibility with older, non-RDF aware, tools, you may want to keep the foaf:knows property as well.


<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:foaf="http://xmlns.com/foaf/0.1/"
      xmlns:rel="http://purl.org/vocab/relationship/"
      >

  <foaf:Person rdf:nodeID="ian">
    <foaf:name>Ian Davis</foaf:name>
    <foaf:title>Mr</foaf:title>
    <foaf:firstName>Ian</foaf:firstName>
    <foaf:surname>Davis</foaf:surname>

    <rel:hasMet>
      <foaf:Person>
        <foaf:name>William Tell</foaf:name>
      </foaf:Person>
    </rel:hasMet>

    <rel:collaboratesWith rdf:nodeID="eric"/>
  </foaf:Person>

  <foaf:Person rdf:nodeID="eric">
    <foaf:nick>pixel</foaf:nick>
  </foaf:Person>



</rdf:RDF>
'''^^rdf:XMLLiteral . rdf:type ov:SchemaExample ; rdfs:label "Using With HTML and XHTML" ; rdfs:comment """

The relationship vocabulary can be used to describe relationships with the people linked from a web page. This is particularly useful for blogrolls or contact lists but can be used with any type of link. The HTML a element provides two attributes, rel and rev, that can be used to specify the relationship. Both rel and rev take a space separated list of keywords as their value. To use a term from the relationship vocabulary just drop the http://purl.org/vocab/relationship/ namespace to leave the property name, e.g. http://purl.org/vocab/relationship/worksWith would become worksWith which can be added as the value of rel or rev.

rel

The rel attribute specifies a relationship that the author of the linked page has with the author of the linking page. For example: 

<ahref="http://example.com/boats" rel="childOf">The boat we restored"</a>

This link states that the author of http://example.com/boats is a child of the author of the html above.

rev

The rev attribute specifies a relationship that the author of the linking page has with the author of the linked page. The example here is: 

<ahref="http://example.com/boats" rev="childOf">The boat we restored"</a>

In this case the meaning of the link is reversed: the author of the html above is a child of the author of http://example.com/boats.

The HTML and XHTML recommendations require an HTML document to declare a custom profile if it uses any non-standard rel or rev types. This is done by adding a profile attribute with a value of http://purl.org/vocab/relationship/ to the document's head element. 

  <head profile="http://purl.org/vocab/relationship/">
    <title>People I Know</title>
  </head>

Complete Example

  <html profile="http://purl.org/vocab/relationship/">
    <head>
      <title>People I Know</title>
    </head>
    <body>
      <p>Here are the people I know:</p>
        <ul>
          <li><a href="http://example.com/~freddy" rel="closeFriendOf">Freddy (he's cool!)</a></li>
          <li><a href="http://frooble.com/" rel="mentorOf">Jimbo</a></li>
          <li><a href="http://mmmm.com/klm" rel="friendOf">Katie</a></li>
          <li><a href="http://example.com/~omah" rel="worksWith">Omah (does the coding)</a></li>
          <li><a href="http://example.com/~jason" rev="closeFriendOf employedBy">Jason, my henchman</a></li>
        </ul>
      </body>
    </html>

RDF Interpretation

Custom parsers that extract RDF from (X)HTML can use the relationships expressed in the links to infer the equivilent RDF triples. It should be remembered that the relationship is between the authors of the pages not between the pages themselves. Given the following link on a document at http://example.com/mypage.html: 

<ahref="http://example.com/boats" rel="childOf">The boat we restored"</a>

a suggested RDF extraction is:

  <foaf:Person>
    <foaf:maker rdf:resource="http://example.com/boats"/>
    <rel:childOf>
      <foaf:Person>
        <foaf:maker rdf:resource="http://example.com/mypage.html"/>
      </foaf:Person>
    </rel:childOf>
  </foaf:Person>
"""^^rdf:XMLLiteral .