Arc is one of the first federated searching services based on the OAI protocol. Arc harvests metadata from several OAI compliant archives, normalizes them, and stores them in a search service based on a relational database (MYSQL or Oracle). At present, we have over one million metadata records from over 80 data providers from various domains.

• X. Liu, K. Maly, M. L. Nelson, M. Zubair, Lessons Learned with Arc, An OAI-PMH Service Provider, Library Trends 53(4), 2005, pp. 590-603.

• F. Jayakanth, M. Zubair, and L Aswath,K.Maly,"Static and Dynamic Approaches to Make Legacy Databases OAI-compliant", D-Lib Magazine, In Brief, Volume 11 Number 10, October 2005.