URN as namespace URI for RDF Schema

We intend to create a specific RDF Schema within an RDF system of another party 
- and hence have to identify our resources by our own namespace. 

Looking at the RDF specs and a lot of examples I found virtually all RDF 
namespaces are made from the http URI schema and all have as last character a # 
or a /. 

This raises these questions:

- is there anywhere a written requirement for having only URIs from the http 
schema.

- where does this #- or /-sign requirement come from

- Finally: as we usually specify all our XML namespaces with URIs from the URN 
schema would this be possible for a RDF Schema - as URNs don't allow for having 
/- and #-signs.

Thanks

Michael
==================================================
Sent by:
Michael Steidl
Managing Director of the IPTC <mdirector@iptc.org>
International Press Telecommunications Council
"Information Technology for News"
Visit us on the web at  http://www.iptc.org

Received on Monday, 4 October 2004 15:58:05 UTC