As Rob says, there is no 'official' registry for OAI metadata
identifiers, but I maintain a registry of OAI data providers which is
maintained by querying the actual OAI data providers:
To get an idea of the extent of the metadata madness take a look at this
> Rob Sanderson wrote:
>> PMH has an operation listMetadataFormats which lists the local names and
>> any other information it has about the formats it supports.
>> (view source to see the response without the helpful XSLT)
>> Eg, they have the problem, but don't even bother with a registry.
>> On Wed, 2009-05-20 at 15:30 +0100, Ray Denenberg, Library of Congress
>>> From: "Dr R. Sanderson" <[log in to unmask]>
>>>> There isn't one, but the protocol has the same requirements as SRU
>>>> and OpenURL.
>>> I remain confused. If the protocol has the requirement to specify a
>>> schema identifier, there must be some way for an implementor to (1)
>>> find out the appropriate identifier for a particular schema,
>>> including finding out that there isn't one; and (2) register an
>>> identifier for a schema when there isn't one.