In terms of OAI, Herbert and co at Los Alamos have done interesting work
in returning MPEG21/DIDL documents as the "metadata" record, so the same
can be argued the other way as well.
On Fri, 12 Aug 2005, Matthew J. Dovey wrote:
>> If the intention is to include properties describing the
>> metadata record
>> (REC), then perhaps it might be better for SRW/SRU to adopt
>> the approach
>> taken by OAI PMH and place this information in a record "header"
>> separate from the metadata.
>This doesn't necessarily work in all cases - I think I did give the
>learning object repository example where we potentially might return a
>learning object, learning object metadata and learning object metadata
>metadata (e.g. a REC record for the metadata). At present we *are* just
>using different transactions (requesting different recordSchema)
>depending on which we want back, and don't (yet) have a real requirement
>to get all back in a single response.
>> This would be a useful place to park other types of data we haven't
>> considered yet, for example Rights Data applying to the
>> metadata record.
>The issue is we could add such a header - but in many ways we are
>duplicating what other (and possible better) schemas such as METS,
>MPEG21 etc. already do.
>Also adding the header does not necessarily address the other
>requirement - which is someone who *is* using a container schema such as
>METS may wish to be able to request what schemas are contained within
>that container (admittedly it isn't yet clear whether this is a real
>requirement now or just anticipation of a future one).