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- From: "Joshua E. Smith" <jesmith@kaon.com>
- To: "XML Developers' List" <xml-dev@ic.ac.uk>
- Date: Thu, 13 May 1999 20:51:27 -0400
At 11:37 AM 5/13/99 -0700, David LeBlanc wrote:
>Would (S1? | S2? | S3? | (C1 | C2 | C3)*) work?
Nope. That would allow only one of S1, S2, or S3. I need to allow up to
one of each, in any order.
As was pointed out in a separate, but coincidentally related, thread, you'd
have to put a * at the end of that, which suddenly loses singletonness. Alas.
But I guess the & syntax from SGML is deceptively simple. I don't
completely follow that other thread, but I gather it's hard to implement
which is probably why they left it out of XML.
-Joshua Smith
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