Relation akts#temporal_relation_from_time_point (sumo#time_point,sumo#nonnegative_integer)
  subtype:  akts#second-of  akts#minute-of  akts#hour-of  akts#day-of  akts#month-of  akts#year-of
  supertype:  akts#temporal_relation (?,?)
     supertype:  pm#temporal_relation (?,?)
        supertype:  pm#relation_playing_a_special_role (*)  this type permits to categorize relations according to their roles ; this is a traditional but quite subjective way of categorizing relations
           >part of:  pm#relation__related_thing__relatedthing___related_with  type for any relation (unary, binary, ..., *-ary) and instance of pm#relation_type
        supertype:  pm#when_relation (?,?)
           supertype:  pm#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:  pm#relation__related_thing__relatedthing___related_with  type for any relation (unary, binary, ..., *-ary) and instance of pm#relation_type