[XML-SIG] Re: XML-SCHEMA

[Paul Prescod]

Andy Heath wrote:
> 
> ...
>
> For me the major point is the ability to reference other schemas
> within a schema.  This give a tool for abstraction that
> is otherwise absent.  It seems to me that this particular
> mechanism is sorely needed.

XML DTDs have always been able to refer to and build on other XML DTDs.

XML schemas are marginally better than DTDs at abstraction but I think
that both have a fatal flaw in that their abstraction mechanisms only
work on the tree data structure and do nothing for links. What real
application does not rely on links?

-- 
 Paul Prescod  - ISOGEN Consulting Engineer speaking for himself
It's difficult to extract sense from strings, but they're the only
communication coin we can count on. 
	- http://www.cs.yale.edu/~perlis-alan/quotes.html