Singletons in a DTD
Joshua E. Smith
jesmith at kaon.com
Fri May 14 02:55:34 BST 1999
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.
xml-dev: A list for W3C XML Developers. To post, mailto:xml-dev at ic.ac.uk
Archived as: http://www.lists.ic.ac.uk/hypermail/xml-dev/ and on CD-ROM/ISBN 981-02-3594-1
To (un)subscribe, mailto:majordomo at ic.ac.uk the following message;
To subscribe to the digests, mailto:majordomo at ic.ac.uk the following message;
List coordinator, Henry Rzepa (mailto:rzepa at ic.ac.uk)
More information about the Xml-dev