@Unpublished{c3demo,
  author = 	 {S. Chawathe and V. Gossain and X. Liu and J Widom
                  and S. Abiteboul},
  title = 	 {Representing and Querying Changes in Heterogeneous
                  Semistructured Databases (Demonstration Description)},
  note = 	 {Available at {\tt http://www-db.stanford.edu}},
  year =	 1997,
  month =	 nov
}