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  • From: John Cowan <johnwcowan@g...>
  • To: u123724 <u123724@g...>
  • Date: Tue, 20 Dec 2016 11:34:11 -0500


On Tue, Dec 20, 2016 at 11:26 AM, u123724 <u123724@g...> wrote:

XML Schema is language for describing a grammar, not a "data model"
(whatever that is), even though its being (ab-)used all the time.
Being a grammar, it describes a class of *sequences* over characters
or content tokens.


It's mostly a grammar, but not exclusively.  In particular, subtyping by extension and restriction are data-model-like features that have nothing to do with whether a particular document conforms to a particular grammar, as it is always possible to compile them out of the schema.

--
GMail doesn't have rotating .sigs, but you can see mine at http://www.ccil.org/~cowan/signatures


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