Relation pm#transitive_relation (?,?)  this category only serves structuration purposes: it is instance of pm#transitive_relation_type which is not instance of pm#class_of_inheritable_relation_type
  subtype:  pm#equivalence_relation  pm#partial_ordering_relation  sumo#successor_attribute_closure  sumo#proper_part  sumo#less_than  sumo#greater_than  sumo#located  sumo#crosses  sumo#precondition  sumo#sub_proposition  sumo#sub_plan  sumo#larger  sumo#smaller  sumo#starts  sumo#finishes  sumo#before  sumo#during  sumo#earlier  sumo#superficial_part  sumo#interior_part  sumo#geographic_subregion  sumo#geopolitical_subdivision  sumo#developmental_form  sumo#version  sumo#ancestor  sumo#brother  sumo#sister  dl#part  dl#proper_part
  type:  pm#transitive_relation_type  a binary_relation ?REL is transitive if (?REL ?INST1 ?INST2) and (?REL ?INST2 ?INST3) imply (?REL ?INST1 ?INST3), for all ?INST1, ?INST2, and ?INST3
  supertype:  pm#binary_relation_with_particular_mathematical_property (?,?)
     supertype:  pm#relation_with_particular_mathematical_property (*)
        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
           >part of:  pm#relation__related_thing__relatedthing___related_with  type for any relation (unary, binary, ..., *-ary) and instance of pm#relation_type