The location of the record definition in the CDD directory hierarchy.
  The  full  dictionary  path  name  of  a directory, subdictionary, or
  object consists of the concatenation of the given names  of  all  its
  ancestors,  beginning  with  CDD$TOP  and ending with its given name.
  Separate each given name from the next with a period.

  An example of a path_name is CDD$TOP.CORPORATE.ADDRESS_RECORD.