Concerning translations to other formats:
The translation from KIF to Protege uses certain devices to work around the
lack of axiom support in Protege and the lack of support for higher-arity
relations. For the axioms, in past versions I had simply recorded KIF axioms
as
instances of a subclass of :PAL-CONSTRAINT (called :SKIF-AXIOM).
But the latest version of Protege apparently places some kind of restraint
on
the format of :PAL-CONSTRAINTs, and the axioms did not load properly. I will
have to change the class for these axioms to something else that doesn't mangle
the text. This will be simple enough, but in the present Protege files on the
MICRA site, the axioms don't appear in the current import.
As for the higher-arity relations, instances of the relations are
visualized
as instances of the metaclasses :Proposition or :Assertion; and the relation
definitions are present as slots with added facets which specify the
restrictions on the argument types. However, unlike with ordinary (binary)
slots, there is no way at present to specify restrictions on arguments other
than the last ("value") argument, when those restrictions differ on subclasses
of the highest-level class on which the relation is defined. This would
require
additional programming, probably overriding existing Protege functions, and is
not likely to be implemented in the foreseeable future.
In a discussion of the KIF-Protege translation with Holger Knublauch, he
suggested that it would be helpful to have an OWL base ontology which includes
built-in definitions of the Protege classes used to work around these problems.
It sounds like a way to get translation from SKIF to OWL, and also to be able
to use the Protege visualization and editing tool. I regrettably have much
less
time to do any work on that now, and am not sure when if ever I will be able
to
add any enhancements to the existing import plug-in. As I have mentioned
before, there is still no export functions, so Protege cannot be used with the
current import plug-in as an accurate editing environment for SKIF ontologies.
I will try to find some time to resume work on the translation, but can't
predict when any more progress will be made. For the time being, I can import
SKIF ontologies into Protege, but only for the purpose of visualization. (01)
Pat (02)
Peter P. Yim wrote:
> Thanks, Pat.
> I assume those who are making translations from Protege (to other
> formats) could start now ... please post any problems encountered so
> that we can collaboratively resolve them. It's only 12 more working days
> to the EIDX panel presentation. Thanks in advance.
>
> -ppy
> --
> (03)
--
=============================================
Patrick Cassidy (04)
MICRA, Inc. || (908) 561-3416
735 Belvidere Ave. || (908) 668-5252 (if no answer above)
Plainfield, NJ 07062-2054 (05)
internet: cassidy@xxxxxxxxx
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