Relation pm#relation_to_set_or_class (*,set_or_class)
subtype: closed_on reflexive_on irreflexive_on partial_ordering_on total_ordering_on trichotomizing_on equivalence_relation_on relation_to_class relation_to_another_set_or_class
supertype: relation_to_collection (*,collection)
supertype: relation_from/to_thing_of_common_kind (*) this type permits to categorize relations according to their signatures and hence offers (i) a concise way to set essential exclusion relations, and (ii) a systematic and easy-to-follow categorization
>part of: relation__related_thing__relatedthing___related_with type for any relation (unary, binary, ..., *-ary) and instance of pm#relation_type
supertype: what_relation (*)
supertype: wh-/how_relation (*) this type permits to categorize relations according to the usual who/what/why/where/when/how questions ; this is a traditional but very subjective and ineffective 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