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Re: DTD and Schema Teasers

• To: "Bullard, Claude L (Len)" <clbullar@i...>
• Subject: Re: DTD and Schema Teasers
• From: Rich Salz <rsalz@d...>
• Date: Wed, 17 Dec 2003 10:56:49 -0500
• Cc: "'xml-dev@l...'" <xml-dev@l...>
• In-reply-to: <15725CF6AFE2F34DB8A5B4770B7334EE03F9F08B@h...>
• References: <15725CF6AFE2F34DB8A5B4770B7334EE03F9F08B@h...>
• User-agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.4b) Gecko/20030507

> 2.  What are good reasons for having multiple schemas for the same 
>     instance?

It supports multi-stage (workflow) processing real well.  The perimeter 
gateway only needs to know that it's a SOAP message, the security 
processor needs to know that somewhere in the SOAP header is a 
WS-Security element, etc.  I wrote about this in a bit more detail for 
an O'Reilly column:
    http://www.xml.com/pub/a/ws/2003/09/02/typeless.html


-- 
Rich Salz, Chief Security Architect
DataPower Technology                           http://www.datapower.com
XS40 XML Security Gateway   http://www.datapower.com/products/xs40.html
XML Security Overview  http://www.datapower.com/xmldev/xmlsecurity.html

• References:
  • DTD and Schema Teasers
    • From: "Bullard, Claude L (Len)" <clbullar@i...>

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