Open Access News

News from the open access movement


Wednesday, November 02, 2005

OA, OAI, and Overlays

Magnus Enger, The concept of 'overlay' in relation to the Open Archives Initiative Protocol for Metadata Harvesting (OAI-PMH), draft 0.1 of what looks like a growing book (94 pp. so far). Excerpt:
Over the past several years there has been a growing dissatisfaction with how the dissemination of scholarly documentation works. This, combined with the new possibilities opened up by the ubiquity of computers and the Internet in higher education and other research-related institutions, has led to an “experimental fumbling”...to find new ways of disseminating scholarly documentation. I will begin my explorations into this changing landscape by introducing the Open Access-”movement” and the Open Archives Initiative Protocol for Metadata Harvesting (OAI-PMH), which makes it possible to harvest metadata from many archives into federated services. I will then go on to discuss, based on its usage in the literature, the concept of “overlay” as it relates both to Open Archives and other sources/forms of documentation. A short survey of existing overlay services (or “Service Providers”, as they are known within the OAI-PMH framework) will be given, with an eye to relating them to the previous discussion. Finally an overview of a prototype service provider will be presented. In closing, the suitability of the OAI-PMH, in its current incarnation, as a framework for constructing value-adding overlay services to Open Access repositories will be discussed, along with some suggestions for future work.