Relation pm#partial_ordering_relation (?,?)  this category only serves structuration purposes: it is instance of pm#partial_ordering_relation_type which is not instance of pm#class_of_inheritable_relation_type
  subtype:  pm#total_ordering_relation  pm#inferior_or_equal_to  pm#superior_or_equal_to  pm#generalizing_type  sumo#subclass  pm#specializing_type  pm#constitution  pm#part  pm#wnMember  pm#sub_collection  sumo#sub_attribute  sumo#sub_collection  sumo#less_than_or_equal_to  sumo#greater_than_or_equal_to  sumo#sub_list  sumo#initial_list  sumo#subsumes_content_class  sumo#subsumes_content_instance  sumo#temporal_part  sumo#before_or_equal  sumo#sub_process  sumo#sub_organization  sumo#geometric_part
  type:  pm#partial_ordering_relation_type  binary_relation that is reflexive, antisymmetric and transitive
  supertype:  pm#reflexive_relation__reflexiverelation (?,?)  this category only serves structuration purposes: it is instance of pm#reflexive_relation_type which is not instance of pm#class_of_inheritable_relation_type
     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
              supertype:  pm#relation__related_thing__relatedthing___related_with (*)  type for any relation (unary, binary, ..., *-ary) and instance of pm#relation_type
  supertype:  pm#antisymmetric_relation__antisymmetricrelation (?,?)  this category only serves structuration purposes: it is instance of pm#antisymmetric_relation_type which is not instance of pm#class_of_inheritable_relation_type
     supertype:  pm#binary_relation_with_particular_mathematical_property (?,?)
  supertype:  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
     supertype:  pm#binary_relation_with_particular_mathematical_property (?,?)


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