> Rob:
> ---
> Modify recordSchema semantics to allow multiple schema 
> identifiers/names.
> If multiple schemas are given:
> a)  The first MUST be a wrapper schema, the rest are schemas 
> to include.
>     If the first isn't then it's an error.  (Ray)
> b)  If the first is not a wrapper schema, then it's a choice of schema
>     (as per one of the current extensions)  (Rob)

We do hit a problem of what the delimiter is. Whatever we chose as a
delimiter must be an allowed character in a URL so that it can be used
in SRU.

However, ipso facto, it is a permissible character which may occur in a
bone fide record schema URI!

So whatever we chose there is always the potential that a record schema
URI will contain that character and break things.

Alternatively we make the recordSchema parameter repeatable - although
that would presumedly require a version number change.

Matthew