Relation pm#attributive_relation__attributiverelation (*)  like pm#binary_relation, this type mostly exists to categorize what cannot be categorized elsewhere
  exclusion:  mereological_relation  intentional_relation  temporal_relation  object_relation
  subtype: {attributive_relation purpose has-author owned-by owner owner_of leader seller customer generator creator spatial_origin exploits has_purpose has_purpose_for_agent measure attribute name Date value rdf_reification_relation support example syntax has-magnitude}  editor
  supertype:  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:  relation__related_thing__relatedthing___related_with  type for any relation (unary, binary, ..., *-ary) and instance of pm#relation_type