RE: requesting XML records

> 5) URIs in the ESN should be used to uniquely name one 
> schema.  I.e. URIs
>    should not be used to name more than one schema and each 
> schema should,
>    as far as possible, only be assigned one URI.

I can't see how the latter can be achieved without some kind of
registry, apart from perhap within the context of a profile.

As regards the former, you could argue that a URI might refer to
multiple acceptable schema - e.g. Theo's DCX effectively references any
schema which uses DC terms.

Matthew