JISC has released SHERPA DP: Final Report of the SHERPA DP Project.
Here's an excerpt from the "Executive Summary":
The SHERPA DP project (2005–2007) investigated the preservation of digital resources stored by institutional repositories participating in the SHERPA project. An emphasis was placed on the preservation of e-prints—research papers stored in an electronic format, with some support for other types of content, such as electronic theses and dissertations.
The project began with an investigation of the method that institutional repositories, as Content Providers, may interact with Service Providers. The resulting model, framed around the OAIS, established a Co-operating archive relationship, in which data and metadata is transferred into a preservation repository subsequent to it being made available. . . .
The Arts & Humanities Data Service produced a demonstrator of a Preservation Service, to investigate the operation of the preservation service and accepted responsibility for the preservation of the digital objects for a three-year period (two years of project funding, plus one year).
The most notable development of the Preservation Service demonstrator was the creation of a reusable service framework that allows the integration of a disparate collection of software tools and standards. The project adopted Fedora as the basis for the preservation repository and built a technical infrastructure necessary to harvest metadata, transfer data, and perform relevant preservation activities. Appropriate software tools and standards were selected, including JHOVE and DROID as software tools to validate data objects; METS as a packaging standard; and PREMIS as a basis on which to create preservation metadata. . . .
A number of requirements were identified that were essential for establishing a disaggregated service for preservation, most notably some method of interoperating with partner institutions and he establishment of appropriate preservation policies. . . . In its role as a Preservation Service, the AHDS developed a repository-independent framework to support the EPrints and DSpace-based repositories, using OAI-PMH as common method of connecting to partner institutions and extracting digital objects.