Relationpm#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_typesubtype: pm#equivalence_relation pm#partial_ordering_relation sumo#overlaps_temporally sumo#connected sumo#overlaps_spatially type: pm#reflexive_relation_typea relation is reflexive if (?REL ?INST ?INST) for all ?INSTsupertype: 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 categoriessupertype: pm#relation__related_thing__relatedthing___related_with (*)type for any relation (unary, binary, ..., *-ary) and instance of pm#relation_type