title: MOPSEUS – A DIGITAL REPOSITORY SYSTEM WITH SEMANTICALLY ENHANCED PRESERVATION SERVICES
creators: Dimitris Gavrilis Stavros Angelis Christos Papatheodorou
abstract: Repository platforms offer significant tools aiding institutions to preserve the wealth of their information resources. This paper presents the data model as well as the architectural features of Mopseus, a digital library service, built on top of Fedora-commons middleware, designed to facilitate institutions to develop and preserve their own repositories. The main advantage of Mopseus is that it minimizes the customization and programming effort that Fedora-commons involves. Moreover it provides an added value service which semantically annotates the internal structure of a Digital Object. The paper focuses on the preservation functionalities of Mopseus and presents a mechanism for automated generation of PREMIS metadata for each Digital Object of the repository. This mechanism is activated whenever an object is modified and is based on a mapping of the Mopseus data model to the PREMIS data model that ensures the validity of the transformation of the information stored in a Mopseus repository to semantically equivalent PREMIS metadata.