Why namespaces?

Mark Birbeck Mark.Birbeck at iedigital.net
Fri Sep 3 12:53:45 BST 1999

David Brownell wrote:
> Mark Birbeck wrote:
> > 
> > So, how else do you make the distinction? You can't use DTDs if the
> > XHTML is inside another doc - so what else?
> But "XHTML inside another doc" is the very combining of vocabularies
> (modularization etc) that XHTML 1.0 isn't intended to address.

I understand modularization (in the context of XHTML) to be the breaking
up XHTML into a number of modules - tables, lists, block text features,
scripts and so on.

I understand "XHTML inside another document" to be something different,
and is illustrated by the MathML example in the proposal. As with any
mixing of vocabularies in a document, it requires a namespace for each
vocabulary. XHTML 1.0 *is* intended to address that, although through no
fault of its own, it cannot create combined documents that can be


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