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   Re: Hierarchical namespaces?

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  • From: "Clark C. Evans" <clark.evans@manhattanproject.com>
  • To: Tim Bray <tbray@textuality.com>
  • Date: Wed, 29 Dec 1999 22:49:33 -0500 (EST)

On Wed, 29 Dec 1999, Tim Bray wrote:
> At 08:44 PM 12/29/99 -0500, Joe Lapp wrote:
> >So I'm thinking that we need a *standard* way to organize namespaces
> >hierarchically, and that we need one before namespace usage is so
> >widespread that we absolutely have to provide regex support.
> 
> Sounds like a good idea.  How about a proposal?  Shorter is better.

I don't remember where, but I remember reading an example where
a URL was given as the xmlns URI -- pointing to an XmlSchema; 
thus, not only uniquely defining the namespace, but also 
identifying the element definitions in that namespace. So, 
this is how I had seen namespaces being powerful, as a pointer
to meta-data.

That being said, I had never expected a set of namespaces 
to have value by organizing them hierarchially... so I'm 
wondering exactly what value a hierarchy of namespaces would 
provide?  Would it be a sequence of ever-so-much-more-specific
schemas?  Where the most specific definition is the binding 
one? I can't think of any other reasons why I'd have more
than one namespace for a given "domain", let alone a 
hierarchically organized set.  What am I missing?

Thanks!

Clark





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