bloggs family, the

from The Free On-line Dictionary of Computing (8 July 2008)

Bloggs Family, the

   An imaginary family consisting of Fred and Mary Bloggs and
   their children.  Used as a standard example in knowledge
   representation to show the difference between extensional and
   intensional objects.  For example, every occurrence of "Fred
   Bloggs" is the same unique person, whereas occurrences of
   "person" may refer to different people.  Members of the Bloggs
   family have been known to pop up in bizarre places such as the
   DEC Telephone Directory.  Compare {Mbogo, Dr. Fred}.