URI references in semantic attributes

Hi,

About URI references used by semantic attributes :

> The value of the role or arcrole attribute must be a URI reference as 
> defined in [IETF RFC 2396]. The URI reference identifies some resource
> that describes the intended property. When no value is supplied, no 
> particular role value is to be inferred. Disallowed URI reference 
> characters in these attribute values must be specially encoded as 
> described in 5.4 Locator Attribute (href).

Questions such as :

 - are relative references allowed ?
 - how should they be processed ?
 - when are 2 semantic attributes equal ?

can be left to the application designers, but aren't we risking, to some
extent, to see the same debates than for namespaces URIs ?

Eric (over careful ?)
-- 
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Eric van der Vlist       Dyomedea                    http://dyomedea.com
http://xmlfr.org         http://4xt.org              http://ducotede.com
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