W3C home > Mailing lists > Public > www-xml-schema-comments@w3.org > January to March 2000

Re: entities in XML Schema

From: Henry S. Thompson <ht@cogsci.ed.ac.uk>
Date: 13 Mar 2000 10:18:01 +0000
To: "xml-dev" <xml-dev@xml.org>
Message-ID: <f5b1z5ffa1y.fsf@cogsci.ed.ac.uk>
"Mark Volkmann" <volkmann@inlink.com> writes:

> I've poured over all three parts of the XML Schema working draft (0, 1 & 2)
> and cannot find anything similar to entity definitions in DTDs. Am I missing
> it or has that functionality been omitted from XML Schema on purpose?

Yes.  Since XML Schema begins work on the infoset of a well-formed
(perhaps valid) XML document, parsed entity definition substitution
has already taken place.  We decided a two-pass architecture was too
clunky, and arguably impossible, and concluded the best thing was to
leave XML 1.0 entities to XML 1.0 mechanisms (i.e. you can define
entities in the internal subset) .

  Henry S. Thompson, HCRC Language Technology Group, University of Edinburgh
          W3C Fellow 1999--2001, part-time member of W3C Team
     2 Buccleuch Place, Edinburgh EH8 9LW, SCOTLAND -- (44) 131 650-4440
	    Fax: (44) 131 650-4587, e-mail: ht@cogsci.ed.ac.uk
		     URL: http://www.ltg.ed.ac.uk/~ht/
Received on Monday, 13 March 2000 05:18:04 UTC

This archive was generated by hypermail 2.4.0 : Friday, 17 January 2020 23:08:46 UTC