Relation pm#definition (?,pm#description_content/medium/container)  see also #definition
  subtype:  rst#definition  a logical relation should be used instead of this relation
  supertype:  rdfs#is_defined_by (?,pm#entity)  in WebKB, pm#definition SHOULD BE USED INSTEAD
     supertype:  rdfs#see_also__seealso (?,pm#entity)
        supertype:  sumo#refers (?,?)  the 1st argument mentions or includes a reference to the 2nd argument, e.g., an article whose topic is a recent change in the price of oil may refer to many other things, e.g., the general state of the economy, the weather in California, the prospect of global warming, the options for alternative energy sources, the stock prices of various oil companies, etc.
           supertype:  dc#Relation (?,?)  to specify a reference to a related resource; in WebKB, pm#relation or MORE PRECISE RELATION TYPES SHOULD BE USED INSTEAD
              supertype:  pm#binary_relation (?,?)  in WebKB, most relation types are binary and some have a variable number of arguments (as in KIF), hence this type is currently only specialized by types that I do not want to see as direct subtypes of pm#relation
                 supertype:  pm#relation_with_particular_property (*)  this rather fuzzy type permits to group categorization schemes less common than those covered by the previous sibling categories
                    supertype:  pm#relation__related_thing__relatedthing___related_with (*)  type for any relation (unary, binary, ..., *-ary) and instance of pm#relation_type
  supertype:  pm#annotation (?,pm#description_content/medium/container)
     supertype:  pm#topic (?,pm#entity)
        supertype:  dc#Description (?,pm#entity)  to specify an account of the content of a resource; in WebKB, pm#topic or pmdescr SHOULD BE USED INSTEAD
           supertype:  pm#binary_relation (?,?)  in WebKB, most relation types are binary and some have a variable number of arguments (as in KIF), hence this type is currently only specialized by types that I do not want to see as direct subtypes of pm#relation


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