OASIS Mailing List ArchivesView the OASIS mailing list archive below
or browse/search using MarkMail.


Help: OASIS Mailing Lists Help | MarkMail Help



   Re: #PCDATA in model group that is not optional and repeatable (was: XML

[ Lists Home | Date Index | Thread Index ]
  • From: David Megginson <dmeggins@uottawa.ca>
  • To: <geirog@falch.no>
  • Date: Mon, 21 Apr 1997 06:56:55 -0400

geirog@falch.no writes:

 > >By the way, you gain nothing by using "+" instead of "*", since
 > >#PCDATA can be an empty string.  
 > I know, but why isn't it allowed at all? (or why was it allowed in SGML in
 > the first place?)

Because full SGML treats all content models equally, while XML
attaches special restrictions to those with mixed content.  Full SGML
also allows relatively useless expressions like

  (#PCDATA & foo)*

and it will let you do many other strange things, as long as your
content model does not become ambiguous.

All the best,


David Megginson                 ak117@freenet.carleton.ca
Microstar Software Ltd.         dmeggins@microstar.com
University of Ottawa            dmeggins@uottawa.ca

xml-dev: A list for W3C XML Developers
Archived as: http://www.lists.ic.ac.uk/hypermail/xml-dev/
To unsubscribe, send to majordomo@ic.ac.uk the following message;
unsubscribe xml-dev
List coordinator, Henry Rzepa (rzepa@ic.ac.uk)


News | XML in Industry | Calendar | XML Registry
Marketplace | Resources | MyXML.org | Sponsors | Privacy Statement

Copyright 2001 XML.org. This site is hosted by OASIS