Create an OAI-PMH feed for books listed in the directory

[SteelWagstaff]

The Open Archives Initiative Protocol for Metadata Harvesting (OAI-PMH) is

a low-barrier mechanism for repository interoperability. Data Providers are repositories that expose structured metadata via OAI-PMH. Service Providers then make OAI-PMH service requests to harvest that metadata. OAI-PMH is a set of six verbs or services that are invoked within HTTP.

To make our directory more useful to people who maintain library catalogs and other discovery services, we should consider acting as a 'data provider' for all books listed in the Pressbooks Directory. We could also consider implementing this via the Pressbooks API itself?

See the specification: http://www.openarchives.org/OAI/openarchivesprotocol.html, implementation guidelines: http://www.openarchives.org/OAI/2.0/guidelines.htm, and implementation guidelines for a static repository: http://www.openarchives.org/OAI/2.0/guidelines-static-repository.htm

See Steel's implementation notes: https://docs.google.com/document/d/1rk8QtshvXaNN1byZviP2739vG0yUNqyhnsy8I4ECdno/edit?usp=sharing

See https://www.openarchives.org/pmh/tools/ for a list of tools we might use as the basis for our own solution. Many of these are now abandoned, but https://github.com/cbisiere/oai-pmh appears to be a well-constructed, recently updated PHP library that might be of use.

[SteelWagstaff]

See https://knowledge.exlibrisgroup.com/Primo/Content_Corner/Central_Discovery_Index/Knowledge_Articles/CDI%3A_Institutional_Repository_Program for a list of recommended metadata for ExLibris' CDI.