I may be off-track with this one, so apologies for ignorance:
I'd like to use the OAI-PMH harvester plugin to harvest image metadata using the http://www.digitalnz.org/developer api, which itself harvests from all New Zealand's digital repositories. Does anyone know if this would be possible? An api key is required, which I suspect will cause problems with the Omeka plugin.
It appears that DigitalNZ uses a custom API based off Apache Lucene, not OAI-PMH. In order for you to harvest metadata from their database, someone will need to write an Omeka plugin using a DigitalNZ API library.
Thanks for the prompt reply Jim. I've suggested DigitalNZ contribute an Omeka plugin. If anyone in the Omeka community feels like adding some comments, feel free: http://makeit.digitalnz.org/voting/ideas/85 (I'm assuming non-NZ residents can sign-up).