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Gustaf Liljegren scripsit:
> This wording makes me wonder if there is any case where a non-deterministic
> content model would acctually be useful? That is, is the restriction a
> compromise, or can a non-deterministic content model always be simplified
> (like many algebraic expressions) to something shorter with the same meaning?
Non-deterministic models cannot always be simplified, and often it's not
convenient to do so. For example, the model
foo, foo, foo?, foo?, foo?
is non-deterministic but clear; the deterministic version is
foo, foo, (foo, (foo, foo?)?)?
and this is a very simple case. In more complex cases, the conversion
is a big pain: consider
(foo, foo, foo, bar, bar?) | (foo, foo, bar, bar?, bar?)
RELAX NG supports non-deterministic models freely.
See http://www.relaxng.org .
Do what you will, John Cowan
this Life's a Fiction email@example.com
And is made up of http://www.reutershealth.com
Contradiction. --William Blake http://www.ccil.org/~cowan