Relation pm#purpose (?,?)
  exclusion:  rst#attributive_relation  aktp#has-author  aktp#owned-by  pm#owner  pm#owner_of  sumo#leader  pm#seller  pm#customer  pm#generator  pm#creator  pm#spatial_origin  sumo#exploits  sumo#has_purpose  sumo#has_purpose_for_agent  pm#measure  pm#attribute  pm#name  dc#Date  rdf#value  pm#rdf_reification_relation  pm#support  pm#example  pm#syntax  akts#has-magnitude
  supertype:  pm#attributive_relation  pm#why_relation
  subtype:  pm#goal (pm#process,pm#situation)
  subtype:  rst#purpose (pm#description_content/medium/container,pm#description_content/medium/container)  situation that the described action is intended to reach