p3p#ExtOptional__optional  A P3P processor is not required to understand the value of the rdf:valueof property of resources of this type.
  exclusion:  ExtMandatory
  supertype:  P3P_thing
     supertype:  thing_categorized_in_an_ontology
        supertype:  thing__something___T__t___3D_or_4D_thing_or_anything_else  any category (type or individual) is instance of this type; any type is also a subtype of this type

No statement uses or specializes ExtOptional; click here to add one.