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Aschenbrenner A.,Goettingen State and University Library | Kuster M.W.,Worms University of Applied Sciences | Blanke T.,King's College London | Pempe W.,Goettingen State and University Library
Journal of Digital Information | Year: 2010

Repositories used to be fairly monolithic systems, with a single object store, a tailored content model, and a dedicated application on top. First steps for searching across repositories (e.g. Z39.50, first drafted in 1988; OAI-PMH for content aggregation, first released 2001) are an exception to this. However, we are still far away from an "open repository environment", in which repositories interact on all levels with other agents (e.g. other repositories, added-value services, registries). This paper creates a more fine-grained view on repository federation and analyses existing approaches by decomposing them into a physical, a logical, and a conceptual layer for both the object and the system. Among these attributes, the most evident gap pertains to interaction "patterns" between agents. In particular, the notification pattern is more immediate and directed than existing query and harvesting mechanisms, enabling new federation scenarios and laying the grounds for open repository environments. Prototypes of the concepts presented here are being implemented in the scope of the project Dariah, which establishes an e-Infrastructure for the humanities.

Aschenbrenner A.,Goettingen State and University Library | Aschenbrenner A.,Austrian Academy of Sciences | Enke H.,Leibniz Institute for Astrophysics Potsdam | Ludwig J.,Goettingen State and University Library | Fischer T.,Goettingen State and University Library
Journal of Digital Information | Year: 2011

IT based research environments with an integrated repository component are increasingly important in research. While grid technologies and its relatives used to draw most attention, the e-Infrastructure community is now often looking to the repository and preservation communities to learn from their experiences. After all, trustworthy data-management and concepts to foster the agenda for data-intensive research [1] are among the key requirements of researchers from a great variety of disciplines. The WissGrid project [2] aims to provide cross-disciplinary data curation tools for a grid environment by adapting repository concepts and technologies to the existing D-Grid e-Infrastructure. To achieve this, it combines existing systems including Fedora, iRODS, dCache, JHOVE, and others. WissGrid respects diversity of systems, and aims to improve interoperability of the interfaces between those systems.

Neudecker C.,National Library of the Netherlands | Schlarb S.,Austrian National Library | Dogan Z.M.,Goettingen State and University Library | Missier P.,University of Manchester | And 3 more authors.
ACM International Conference Proceeding Series | Year: 2011

The paper presents a novel web-based platform for experimental workflow development in historical document digitisation and analysis. The platform has been developed as part of the IMPACT project, providing a range of tools and services for transforming physical documents into digital resources. It explains the main drivers in developing the technical framework and its architecture, how and by whom it can be used and presents some initial results. The main idea lies in setting up an interoperable and distributed infrastructure based on loose coupling of tools via web services that are wrapped in modular workflow templates which can be executed, combined and evaluated in many different ways. As the workflows are registered through a Web 2.0 environment, which is integrated with a workflow management system, users can easily discover, share, rate and tag workflows and thereby support the building of capacity across the whole community. Where ground truth is available, the workflow templates can also be used to compare and evaluate new methods in a transparent and flexible way. © 2011 ACM.

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