Doing More With XML Schemas (part 3) (
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This article introduces you to the concept of uniqueness in the XML Schema world,
showing you how to use built-in schema constructs to enforce uniqueness within
your XML document instances.In the first two parts of this article, I spent lots of time and space blathering
on about the advanced aspects of XML schema design, including such arcane concepts
as complex datatypes, derivation by extension and restriction, and type redefinition.
You were probably bored out of your wits, but you nodded your head wisely throughout
out of politeness, and quietly hoped that that all that jargon was a prelude to
something more interesting.
I'm sorry to tell you that it isn't. In fact, this third part is filled with
even more technical gobbledygook, including such beauties as "primary key reference"
and "selector". None of these terms are likely to make your day any sunnier -
but hey, they'll sure teach you a thing or two about designing good schemas. If
that sounds like something you'd like to learn more about, keep reading - it's
time to take a little detour through the supermarket!
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