Relation pm#location (pm#spatial_object,pm#spatial_object)
  supertype:  pm#relation_to_another_spatial_object
  similar_to:  lis#relative_location  lis#connection_of_individual
  subtype:  pm#address__addres (pm#spatial_object -> pm#spatial_object)
     subtype:  pm#main_address (pm#spatial_object -> pm#spatial_object)
     subtype:  pm#secondary_address__secondaryaddres (pm#spatial_object -> pm#spatial_object)
  subtype:  pm#above (pm#spatial_object -> pm#spatial_object)
     subtype:  pm#on (pm#spatial_object -> pm#spatial_object)
  subtype:  pm#below (pm#spatial_object,pm#spatial_object)
  subtype:  pm#near (pm#spatial_object -> pm#spatial_object)
     subtype:  pm#touching (pm#spatial_object -> pm#spatial_object)
  subtype:  pm#far_from__farfrom (pm#spatial_object,pm#spatial_object)
  subtype:  pm#exterior__in (pm#spatial_object -> pm#spatial_object)
  subtype:  pm#interior (pm#spatial_object,pm#spatial_object)
  subtype:  pm#before_location__before (pm#spatial_object,pm#spatial_object)