Relation sumo#instance (?,sumo#set_or_class)  if the common reading conventions of parameters had been respected, this type would have been named instance_of; an object is an instance of a set_or_class if it is included in that set_or_class; an individual may be an instance of many classes, some of which may be subclasses of others; thus, there is no assumption in the meaning of instance about specificity or uniqueness
  subtype:  pm#kind (pm)  sumo#immediate_instance
  related_to:  sumo#member
  type:  pm#binary_predicate_type  the class of predicates relating two items - its valence is two
  supertype:  dc#Type (?,pm#entity)  to specify the nature or genre of the content of a resource; SHOULD NOT BE USED IN WEBKB
     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


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