An XML namespace is not a URL, its a URI. If it looks like a URL (http://mycompany.com/food/thought), it should resolve to an RDDL instead of 404 not found. If it is not a URL it should be a URN (urn:mycompany.com:food/thought).

O'Reily on RDDL has a good document to get you into the headspace.

www.rddl.org has the RDDL specification.

Since a URL is tied to a companies web deployment, i'd structure the URIs such that they dont collide with web content. The webserver should map the final part of the namespace to an RDDL file.

http://<site>/uri/<unique-part>/<version>

namespace URL: http://frogs.com/uri/food/flying-things/1.0

site: frogs.com
unique-part: food/flying-things
version: 1.0



One thing... security. I dont want to let the rest of the world know my internal protocols and schemas. This could be enforced by a secure site (internal.site.com) or protected areas on the site.