Excerpts from Nina Jeliazkova's message of Tue Sep 29 16:01:03 +0200 2009:
> Jörg Kurt Wegner wrote:
> >> I don't know whether this has been discussed before - but has PMML been
> >> considered as a model exchange format? While it doesn't directly support
> >>     
> Since nobody answered so far, I would try to. PMML has been discussed
> and agreed to be a good choice for model exchange format.  The main
> issue currently is limited (read only and not for all type of models)
> Weka support for PMML models.   With some efforts this might be
> resolved, what is more challenging is how to make use of PMML for
> specific SAR and (Q)SAR models, for example those based on structural
> alerts. In particular it is not clear to me how to describe Toxtree in
> PMML in a generic way and I am curious if Christoph has a solution for
> the lazar system.

Having a quick look at PMML I have found a TreeModel
(http://www.dmg.org/v4-0/TreeModel.html), but I have no idea if that
could work for Toxtree. I have found nothing about the representation of
nearest neighbor models and it lacks also graph mining models.

So my first impression is, that PMML is presently limited to a few
"standard" techniques (well k-nn should be standard, too). I am not sure 
if we can/want to extend PMML for additional algorithms, and most of our
specialised/domain specific algorithms might contain too many implementation
details to run on general purpose systems.

Stefan, Andreas and Andreas: Do you have any idea, how PMML would work
for your developments?

Best regards,
Christoph