SDD extensibility

[Hiro Kishimoto <hiro.kishimoto@jp.fujitsu.com>]

Hi all,

As you know, XML is self-describing markup language and hence
its schema has the advantage of extensibility. Several proven
technologies enable system evolutions and provide a means of
backward and forward compatibility at the same time.

I strongly believe that SDD MUST be extensible. The real issue
is how to balance such extensibility and solidity of the schema.

It is not my intention to list up exhaustive extensible points
of the SDD schema at this moment. Instead, I would propose to
agree on the design philosophy of such extensibility of SDD
schema.

You can find multiple success stories, for example JSDL, WSRF,
WS-addressing, and even SOAP header. Also there are very good
public materials.

- Extensibility, XML Vocabularies, and XML Schema (2004/10)
   http://www.xml.com/pub/a/2004/10/27/extend.html
- Creating Extensible Content Models
   http://www.xfront.com/ExtensibleContentModels.pdf

Your thoughts?
-- 
Hiro Kishimoto