🚀 go-pugleaf

I'm still interested in active value databases (as I posted before)
but now I am especially interested in systems that directly support
fuzzy logic (i.e. probability distributions as basic variables,
with standard statistical functions, probabilistic expressions and
conditions including arithmetic, AND, OR, etc.).

Databases or knowledge bases that support a "type fuzzy-value" or
the equivalent would be especially interesting.  The only one I 
knew of was Syntelligence, but now they've gone under...

Obviously there is a lot of research in fuzzy logic, but there seem to
be relatively few commercial products that support it fully, and fewer
attempts to codify exactly how a "fuzzy value" should act.

If you have a reference to any research or commercial products of this 
type, please let me know.  I received some responses on active values
already and got a pointer to the HIFAC system developed by Computer
Corporation of America:

@INPROCEEDINGS{Dayal-88,
         AUTHOR="Umesh Dayal",
         TITLE="{Active Database Management Systems}",
         BOOKTITLE="{Proceedings of the Third International Conference 
		    on Data and Knowledge Bases}",
         YEAR=1988,
         ADDRESS="Jerusalem",
         PAGES={150-169}
              }

and one to this paper:

"Change Propagation in Object Dependency Graphs," Michael Wilk, Cornell U.
will appear at the TOOLS conference in Santa Barbara this July.

I will be happy to summarize further responses on active values and 
commercially-available or object-oriented fuzzy logic systems as I get them.
-- 
  Craig Hubley   "...get rid of a man as soon as he thinks himself an expert."
  Craig Hubley & Associates------------------------------------Henry Ford Sr.
  craig@gpu.utcs.Utoronto.CA   UUNET!utai!utgpu!craig   craig@utorgpu.BITNET
  craig@gpu.utcs.toronto.EDU   {allegra,bnr-vpa,decvax}!utcsri!utgpu!craig