Relation pm#relation_to_another_spatial_object (pm#spatial_object,pm#spatial_object)
  supertype:  pm#relation_from_spatial_object  pm#relation_to_spatial_object  pm#where_relation
  subtype:  pm#location (pm#spatial_object,pm#spatial_object)
     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)
  subtype:  pm#spatial_part__spatialpart (pm#spatial_object,pm#spatial_object)
     subtype:  pm#physical_part (pm#physical_entity,pm#physical_entity)