Relation dl#name (dl#entity,rdfs#Literal)  a relation between an instance of a concept and the name (instance of a concrete data type) of that concept; the name has to be a lexically meaningful name
  inverse:  dl#name_of
  supertype:  dl#extrinsic_relation__extrinsicrelation (?,rdfs#Literal)  support for relations ranging on concrete data types
     supertype:  pm#relation_to_string (*,pm#string)
        supertype:  pm#relation_to_collection (*,pm#collection)
           supertype:  pm#relation_from/to_thing_of_common_kind (*)  this type permits to categorize relations according to their signatures and hence offers (i) a concise way to set essential exclusion relations, and (ii) a systematic and easy-to-follow categorization
              >part of:  pm#relation__related_thing__relatedthing___related_with  type for any relation (unary, binary, ..., *-ary) and instance of pm#relation_type
           supertype:  pm#what_relation (*)
              supertype:  pm#wh-/how_relation (*)  this type permits to categorize relations according to the usual who/what/why/where/when/how questions ; this is a traditional but very subjective and ineffective way of categorizing relations 
                 >part of:  pm#relation__related_thing__relatedthing___related_with  type for any relation (unary, binary, ..., *-ary) and instance of pm#relation_type
  supertype:  rdfs#label (?,pm#string)  in WebKB, with FO, use the link '_'
     supertype:  pm#name (?,?)
        supertype:  pm#attributive_relation__attributiverelation (*)  like pm#binary_relation, this type mostly exists to categorize what cannot be categorized elsewhere
           supertype:  pm#relation_playing_a_special_role (*)  this type permits to categorize relations according to their roles ; this is a traditional but quite subjective way of categorizing relations
              >part of:  pm#relation__related_thing__relatedthing___related_with  type for any relation (unary, binary, ..., *-ary) and instance of pm#relation_type


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