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

 


Help: OASIS Mailing Lists Help | MarkMail Help

 


 

   RE: XML trade off 1 - DTD vs XML Schema

[ Lists Home | Date Index | Thread Index ]
  • From: Tim Bray <tbray@textuality.com>
  • To: MEdson@walldata.com, DuCharmR@moodys.com, xml-dev@ic.ac.uk
  • Date: Wed, 21 Jul 1999 14:44:39 -0700

At 02:00 PM 7/21/99 -0700, MEdson@walldata.com wrote:
>So do you believe that both DTDs and XML Schemas are necessary?  Would you
>please elaborate on what advantage DTDs have over Schemas and if possible
>explain why DTDs were NOT designed to be written in XML?

DTDs are necessary because you need some formal way to describe (at least
part of) your data design.  They have their current syntax because the ISO 
committee that designed SGML thought it was better that way, and XML 
inherited them from SGML.  XML Schemas are said by many to be necessary for 
a variety of reasons, including most prominently datatyping and the use of 
XML syntax.

The most important difference between DTDs and syntax is that are here now
and work now and standardized now.  Admittedly one could wish for something
better but until it arrives DTDs are what we have. -Tim

xml-dev: A list for W3C XML Developers. To post, mailto:xml-dev@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@ic.ac.uk the following message;
(un)subscribe xml-dev
To subscribe to the digests, mailto:majordomo@ic.ac.uk the following message;
subscribe xml-dev-digest
List coordinator, Henry Rzepa (mailto: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