[OAI-implementers] OAI Aggregator

[Martin Vesely]

Hello,


>Having read the article http://documents.cern.ch/ettdh/doc/public/OAIRSF.html
>which talks about hierarchical harvesting, is the idea then for this
>package to collect data from multiple data providers, then provide the
>data to multiple service providers?

For detailed description of hierarchical harvesting see:
http://www.dlib.org/dlib/april01/liu/04liu.html

This is an architectural issue and I think as such it does not cause
conflicts.

The critical point here is the usage of OAI identifiers, depending on the
interpretation of OAI-PMH statement. Reading the protocol:



"A unique identifier is a key for extracting metadata from an item in a
repository.",



the intepretation of this statement seems ambiguous and I think that
Alan's question was answered for one instance only (OAIA), but not in
general, as this concerns all service providers that act as data providers
at the same time: 

>Hmmm, serious question time!
>
>Does the aggregator keep the original identifiers for metadata (or
>assign new local identifiers)?

So the question is: Does the protocol require that service providers keep
the original identifiers?



Thank you,
Martin

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