[relax-ng] Motivation for restrictions in section 7.2

Can someone explain me (or give some pointers) the reasons for the
restrictions in section 7.2 which introduce a difference between content
models which doesn't seem needed a priori.

These restrictions are used for optimization purposes (memoization) in
the derivative algortithm described by James. A part from this, they
don't seem necessary for the implementation (I haven't implemented them
yet and, on the contrary, it seems like they require addition of code).

Also without them, text patterns could be simplified into one or more
token datatypes.

I have surely missed something important here, but what?

Thanks

Eric
-- 
See you in San Diego.
                               http://conferences.oreillynet.com/os2002/
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Eric van der Vlist       http://xmlfr.org            http://dyomedea.com
(W3C) XML Schema ISBN:0-596-00252-1 http://oreilly.com/catalog/xmlschema
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