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RE: [XML Schema 1.1] No changes to derive-by-restriction, right?

From: "Michael Kay" <mike@--------.--->
To: "'Paul Kiel'" <paul@-----------.--->, "'Costello, Roger L.'"
Date: 7/17/2009 5:24:00 PM
> 
> Of course maybe I have this all wrong.  Perhaps the lack of 
> rules will give some freedom and lead to some interesting 
> implementations of this underused feature.  I would love to 
> see that happen.

Personally I suspect that with XSD 1.1, most restricted types will be
specified not by providing a restricted grammar, but by using the original
grammar in conjunction with assertions. For example, if you want to disallow
an optional element from the content model, it's much easier to assert that
the element is absent than to define a restricted grammar in which it is
omitted.

Regards,

Michael Kay
http://www.saxonica.com/
http://twitter.com/michaelhkay


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