Arguments: nil
This function returns nil but is used
for its side effects. It clears the cross reference database, which
will then be ready to receive new information.
See cross-reference.htm for more information on the cross reference facility.
The documentation is described in introduction.htm and the index is in index.htm.
Copyright (c) 1998-2000, Franz Inc. Berkeley, CA., USA. All rights reserved.
Created 2000.10.5.