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When namespaces first came to be, the examples were
for things like dropping SVG into the middle of an
HTML page, including MathML into X3D, etc. Do many
browsers really enable namespace integration like
that? Well, sure, that's what IE does by combining
a CSS declaration for the behavior with the namespace.
.Net enables their ASP web browser controls, VML etc.
like that, in the instance. Yet I don't find schemas
for these perhaps because the schema would document
the object framework.
But yes, in terms of actually sharing data types across
communities of interest, the communities aren't that
interested. From the perspective of the legendary
lone schema hacker, it's easier to include these the
old fashioned way: entities. Where I think this
might be insufficient is testing contract
based requirements that point to an ROA specifying
particular schemas, ie, the sort of thing we get
in government contract work.
From: Ronald Bourret [mailto:email@example.com]
Yes. I've seen it in at least one other organization as well. My point
is that it hasn't crossed schema boundaries and become universal in the
way people thought it might. (There might very well be a good reason for
this. For example, given the potential complexity of addresses, somebody
designing for a local market might be making a very good design decision
to ignore all that complexity and simply encode the address schema that
fits their locale.)