Relation p3p#dynamic.http.referrer.stem__stem (p3p#StructuredDataElement,p3p#Dynamic.http.referrer.stem)  uri stem
  p3p#extends:  "dynamic.http.referrer"
  supertype:  p3p#dataElementComponent__data_element_property (p3p#StructuredDataElement,?)  A part of a data structure
     supertype:  pm#P3P_relation (?,?)
        supertype:  pm#relation_coming_from_an_ontology (*)
           supertype:  pm#relation_for_an_application (*)  relation introduced by an application
              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