DTD vs Schema

[AMER, Nidal]

Dear all,

Some beginner's questions, just don't laugh: 
1.	What is the right way to describe XML message syntax: DTD or
schema. I started by looking at Microsoft site. The publish
documentation on schema but nothing about DTD. They also say schema is a
better way to describe XML as it is XML. 
2.	Is there anywhere a clear documentation on DTD without diving
into the whole SGML DTD stuff? I am lost between HTML4 DTD, SGML DTD and
XML DTD.
3.	The database I am working on is highly hierarchical. MS schema
documentation describes uses SUPERTYPE to declare inheritance. Is there
any equivalent DTD declaration?

Could anybody give me a hand with this?
Many thanks in advance.
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Nidal AMER
R & D Deputy Manager
HDMP ( Health Data Management Partners)
A SmithKline-Beecham Company
6 Rue de Genève,
1140 Brussels, Belgium
Tel: + 32 (2) 724 00 93
Fax: + 32 (2) 726 91 59
E-mail: nidal.amer at hdmp.com <mailto:nidal.amer at hdmp.com> 
Visit our web site: http://www.hdmp.com <http://www.hdmp.com> 
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~


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/
To (un)subscribe, mailto:majordomo at ic.ac.uk the following message;
(un)subscribe xml-dev
To subscribe to the digests, mailto:majordomo at ic.ac.uk the following message;
subscribe xml-dev-digest
List coordinator, Henry Rzepa (mailto:rzepa at ic.ac.uk)