Relationpm#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 relationssubtype: pm#who_relation pm#what_relation pm#why_relation pm#where_relation pm#when_relation pm#how_relation supertype: pm#relation__related_thing__relatedthing___related_with (*)type for any relation (unary, binary, ..., *-ary) and instance of pm#relation_type