Dear John, (01)
> > For interoperability it is not another foundation ontology that is
> > needed, but a mapping between the different foundations that are already
> > found. These in turn can be traced back to the ontological commitments
> > in those foundation ontologies, and how those ontological commitments
> > translate in practical terms.
> I agree. But I would add that legacy systems are based on *implicit*
> ontologies, which are just as important as any explicit ontology.
> It's useful to make those ontologies explicit, but don't ignore
> legacy systems just because their ontology is implicit. (02)
MW: Indeed. And even explicit ontologies do not necessarily state their
commitments explicitly, and those need to be extracted too.
> Computers have been interoperating successfully since they were
> first lashed together in the late 1950s. Long before that, companies
> interoperated by punched cards, banks interoperated by hand-written
> notes since the 16th century, and don't forget cuneiform tablets for
> international commerce in 3000 BC.
> > You need perhaps a hundred or so concepts, so rather less than the
> > 10,000 you mention.
> > The other good thing is that there is nothing to mandate. The mappings
> > deal with how different situations are dealt with under the different
> > ontological commitments, and they can be developed from use cases that
> > cover the usual difficulties. There are probably about 10-20 of those.
> I agree that a small number of concepts is sufficient for interactions
> at the level of detail from the the Sumerians to the Amazon DB schema.
> Engineers need much more detail, but don't forget that in 1969, they
> got hundreds of computers at companies and government agencies to
> interoperate in putting a man on the moon. (03)
MW: In integrating ontologies you need to manipulate them to identify e.g.
equivalent, disjoint and overlapping concepts. But I don't count those as
anything other than concepts derived from those in the ontologies to be
integrated. The concepts you need to do the manipulation are somewhat
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