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Re: Namespaces and overrides
- From: Michael Kay <firstname.lastname@example.org>
- To: email@example.com
- Date: Tue, 21 Dec 2010 15:00:38 +0000
XSD tries to do this with complex type restrictions, but I would
avoid that route if possible, partly because it involves restating
all the things that don't change, partly because you have to define
complex type resctrictions at every level of the XML hierarchy. I
would rely on XPath assertions to define additional constraints from
those in the base schema - expressed either using XSD 1.1, or
Schematron, or simply an XSLT stylesheet.
iCalendar is a very loose standard in which
nearly every component, and every element of those components,
is optional. As we revise, extend, “inherit” those components,
we often need to make certain of their elements mandatory for
some of these service interactions. What are the language /
descriptive formats, preferably machine readable, that you
would use to tighten specifications in this way as you adopt
them for specific re-use scenarios?
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