• To: David Carlisle <davidc@n...>
• Subject: Re: Element declaring
• From: Rich Salz <rsalz@d...>
• Date: Thu, 14 Oct 2004 09:05:41 -0400 (EDT)
• Cc: "xml-dev@l..." <xml-dev@l...>
• In-reply-to: <200410141256.NAA19360@p...>

> The type is a union of a restricted type and that type's base type, isn't
> that always just equivalent to the base type?

Sure.  It's like saying "xsd:string" except that it gives special
significance to particular values.  You can enumerate them in the schema,
define semantics in a spec more easily, etc.

It's just a neat hack.  For standards, in particular, that want to define
some base functionality and still allow an extensibility point, this makes
it explicit.

--  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

• Follow-Ups:
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    • From: Jonathan Robie <jonathan.robie@d...>

• References:
  • Re: Element declaring
    • From: David Carlisle <davidc@n...>

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