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The granularity question is undecided. That is why document
analysis usually precedes schema definition work. Some might
want to create a library of element types that are combined
ad hoc into schemas as appropriate. Tricky stuff. Much
easier with relational systems because they only have one
structure and mapping the base datatypes is simpler, there
usually being a limited range of implementations of relational
systems in the ecosystem.
An ontology can deal with this, I guess, but somehow I see
the semantic web as being more useful closer to the human
view than the machine view. I realize the hype goes in the
opposite direction, but that is what I think.
From: Rick Marshall [mailto:firstname.lastname@example.org]
pretty soon we'll be talking normalisation and data dictionaries again ;)
ps i thought this was exactly the domain of the semantic web.....