- From: Martin Bryan <mtbryan@sgml.u-net.com>
- Date: Tue, 24 Sep 1996 09:13:41 +0100
- To: "W. Eliot Kimber" <kimber@passage.com>, W3C SGML Working Group <w3c-sgml-wg@w3.org>
At 06:35 AM 24/9/96 +0100, W. Eliot Kimber wrote: >>* Should XML prohibit the use of inclusion and exclusion exceptions in >>element declarations? (11.2.4, 11.2.5)? > >Yes. Exclusions are, with very rare exceptions, a bad thing, causing much >more trouble than they're worth. Inclusions, while expressing a useful >semantic, also cause more trouble then they're worth and require DTD >processing. Exclusions are very useful for prohibiting nesting of objects in OR groups that are shared, such as those typically found in %text; parameter entites. For example: <!ENTITY % text (#PCDATA|a|b|c)> <!ELEMENT p (%text;)> <!ELEMENT a (%text;) -(a)> I cannot agree that they are "a bad thing"> ---- Martin Bryan, The SGML Centre, Churchdown, Glos. GL3 2PU, UK Phone/Fax: +44 1452 714029 WWW home page: http://www.u-net.com/~sgml/
Received on Tuesday, 24 September 1996 04:24:06 UTC