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Dan Shoutis wrote:
> ...
> Additionally, I'd like to let anyone who is interested know that I'm in
> the process of building a (toy) relax-ng subtype checker: given two
> simple-syntax grammars a and b, it can check that all instances matched
> by a will also be matched by b (that is, a <= b).
> ...
Can you tell more about how your "regular hedge grammar subtype prover"
works?
You might be interested in this paper:
http://www.brics.dk/~amoeller/papers/xactschemas/abstract.html
(in particular the last part of Section 6) which also discusses these
issues.
/Anders
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