p3p#Purpose-historical__historical_preservation  Information may be archived or stored for the   purpose of preserving social history as governed by an existing law or policy.
  supertype:  p3p#Purpose  The purpose for which the data practise is employed
     supertype:  pm#P3P_thing
        supertype:  pm#thing_categorized_in_an_ontology
           supertype:  pm#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

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