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C. M. Sperberg-McQueen wrote:
> I'm astonished to see document people disowning the idea of
> datatyping, as if better datatyping (and the failure of #PCDATA
> to provide the constraints we wanted, for things like numbers
> or dates or other simple datatypes) had not been one of the
> most frequently mentioned desiderata in discussions of markup
> among professional DTD designers, in the years 1986-1998.
Speaking for myself only (a firmly committed "doc-head"), I'm
not at all opposed to the idea of datatyping. I am, however,
opposed to the way that it's realized in W3C XML Schema, and
the fact that this particular type system continues to infect
otherwise perfectly-good specs like XPath.
I'd be perfectly happy with functionality like the LTDR
and DAFE facilities of HyTime II (with a lighter-weight
binding mechanism and some of the cruft excised).
Relax NG plus HyLex, for instance.