xml-dev - Re: Structured attributes

[Stefan Haustein <haustein@kimo.cs.uni-dortmund.de>]

"Henry S. Thompson" wrote:
> 
> I should have made clear that this was a language-level proposal:  if
> the language changed this way, it would be a separate question what
> mechanisms XML Schema would/should provide in v.2 to provice for
> schema-validation of uses of the new language feature.

I should have made clear that my message was just a joke. :-)

BTW: I like the fact that the new schema proposal is more
layered. Wouldn't it be possible to go one little step
further in this direction and put the types into
the layer of named groups etc, too? Elements could
be defined just like your structured attribute example.
Just add an "extends" attribute to the element 
definitions for semantic and structural inheritage
from other elements. You cannot derive from an
element without structure inheritage in the current 
proposal anyway. Types could still be used for powerful 
structure reuse w/o semantic consequences, expanded by the 
preprocessor layer. Thus, we would reach a 
very simple layer containing the minimum only, but not
lose any of the possibilities in the current 
specs.

Best regards,

Stefan

-- 
Stefan Haustein
University of Dortmund
Computer Science VIII
www-ai.cs.uni-dortmund.de

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