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Re: Best practices: Namespaces, versions and RDDL
- From: David Carlisle <email@example.com>
- To: firstname.lastname@example.org
- Date: Fri, 23 Mar 2001 09:25:11 +0000 (GMT)
> Does it make sense ?
yes, but I think it's a much better policy not to change namespace URI
on version changes. For example early XSL(T) drafts had a similar
policy to the one you describe of adding to a base URI, but fortunately
they changed that before REC and now have a fixed URI and a separate
version attribute for version changes.
To a namespace aware processor, if you change the namespace URI you have
changed the name of _every_ construct in the language.
In most contexts, two languages which do not have a single name in common
would not be considered versions of each other, but rather two separate
Thus I think the rule should be:
If the new system is close enough to the old that you just want to
increment a version number rather than giving it a different name, use
the same namespace.
So in th eyear 2021, MathML version 77 should still use
http://www.w3.org/1998/Math/MathML, but if then we want to make a clean
break and have NewMathML version 1 then at that point switch to
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