Alternative implimentation of the data object as a singleton.
As proposed here: https://mail.gna.org/public/relax-devel/2007-03/msg00013.html
and agreed here: https://mail.gna.org/public/relax-devel/2007-03/msg00058.html#
Authored by: macraild 2007-03-15
Parent: [r3199]
Child: [r3201]
