Relation pm#relation_from_binary_relation_type (pm#binary_relation_type,*)
supertype: pm#relation_from_relation_type
subtype: pm#relation_to_another_binary_relation_type (pm#binary_relation_type,pm#binary_relation_type)
subtype: owl#equivalent_property (pm#binary_relation_type,pm#binary_relation_type) in WebKB, use the link '='
subtype: rdfs#sub_property_of (pm#binary_relation_type,pm#binary_relation_type) in WebKB, use the link '<'
subtype: pm#inverse__reverse (pm#binary_relation_type -> pm#binary_relation_type) for inverseOf(R,S) read: R is the inverse of S; i.e. if R(x,y) then S(y,x) and vice versa; in WebKB, use the link '-'
subtype: rdfs#domain (pm#binary_relation_type,rdfs#class)
subtype: rdfs#range (pm#binary_relation_type,rdfs#class)