I think the DLF Task Force answered this question admirably.

http://diglib.org/architectures/ilsdi/

Jonathan



Matthias Einbrodt wrote:
> Hello,
>
> I'm interested in your opinion regarding the question which (kind of)
> APIs an OPAC should provide nowadays and in the near or maybe not so
> near future!
>
> Thanks in advance and best regards
>
> Matthias Einbrodt
>  
>
>