Function dc#Date (? -> entity)  to specify a date associated with an event in the life cycle of a resource; in WebKB, pm#time or other MORE PRECISE RELATIONS SHOULD BE USED INSTEAD
  exclusion:  attributive_relation  purpose  has-author  owned-by  owner  owner_of  leader  seller  customer  generator  creator  spatial_origin  exploits  has_purpose  has_purpose_for_agent  measure  attribute  name  value  rdf_reification_relation  support  example  syntax  has-magnitude
  supertype:  attributive_relation__attributiverelation (pm)  like pm#binary_relation, this type mostly exists to categorize what cannot be categorized elsewhere
  subtype:  date (situation -> time_measure)
  subtype:  authoring_time__authoringtime (description_content/medium/container -> time_measure)
     subtype:  authoring_date__authoringdate (description_content/medium/container -> time_measure)
  subtype:  publish_date__publishdate (? -> entity)