Finding W3C related namespaces and XML Schema

Dear,
 
While developping, I regularly need namespace URI or XML Schema URL.
Today I can not find these readily via the W3 web site.
Therefore I use unsatisfactory methods to determine the above URI and URL using
- vendor support
- mailing list suggestions
- search engines
 
In order to determine if there is a more unambiguos way, I have the following
questions:
- Does W3C keep a register of namespaces defined by W3C recommendations
- Does W3C keep a register of normative XML schema specifications defined by W3C
recommendations
- Does W3C define how its recommendation must register namspaces or schama
locations
- Will the W3C website index the W3C namespaves and XML schema's

Regards, 

     Johan De Smedt 
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TenForce BVBA 
mobile +32 477 475934 
mail: j.de-smedt@computer.org 
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