Resources

About OAI and the protocol for metadata harvesting: http://www.openarchives.org

An opensource OAI harvester can be downloaded here: http://www.oclc.org/research/activities/harvester2/harvester2.html

The actual specification can be accessed at: http://www.openarchives.org/OAI/openarchivesprotocol.html

An OAI for beginners tutorial from the Open Archives Forum: https://www.oaforum.org/tutorial/

About the metadata format returned: data hierarchy, Europeana Data Model documentation.