Again wit da AND and Repetitions
cowan at locke.ccil.org
Thu May 13 22:40:36 BST 1999
roddey at us.ibm.com wrote:
> What are the feelings of some folks who implemented SGML validators? If you had
> to start with that and add NtoM repetition on top of that, where would that have
> taken you? Or did SGML already provide both of these things? If so, what was the
> general architecture used in some common ones? Why is the sky blue?
IIRC the canonical way of doing (A & B & C) is to transform it
into (A | B | C)* and then do a post-check that each of A, B, C
appears exactly once. As opposed to brute-force expansion into a
John Cowan http://www.ccil.org/~cowan cowan at ccil.org
You tollerday donsk? N. You tolkatiff scowegian? Nn.
You spigotty anglease? Nnn. You phonio saxo? Nnnn.
Clear all so! 'Tis a Jute.... (Finnegans Wake 16.5)
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