Content Repository in Object Oriented data model

The need for creating content repository stores for e-learning systems grows as the number of available materials increases. Moreover, along with the number of courses, the problem of describing them in a unified form appears. While there are standards used for strict classification of elearning content, the store model still seems to be based on preservative relational databases approach.In this paper we introduce an idea to represent the e-learning content management information in the well organized object-oriented form based on a prospective object-oriented database

reusing analysis schemas in odb applications a chart based approach

This paper presents a method for creating, indexing and reusing analysis schemas in developing Object-oriented Data-base (ODB) applications. Analysis schemas are specified by using analysis charts, a user-oriented set of forms structured according to the TQL++ Object-oriented specification model, and are classified according to their structural characteristics and content. A set of analysis charts forms a reusable schema, referred to as an analysis stack. The developer can retrieve and examine stacks by accessing analysis charts containing relevant entity names and structures. Charts are connected by links reproducing TQL++ relationships and connecting 'similar' schemas. The paper presents the measures of similarity between charts and describes the organization of charts in a reuse repository. A Thesaurus of relevant terms and synonyms is coupled with the repository. The Thesaurus and the repository are the basis for guiding developers in deriving new ODB applications through a sequence of steps proposed by a CHarting and Analysis for Reuse Tool (CHART). The methodology for reusing analysis schemas, based on navigation in the repository, and the support tool are described

eSciDoc Infrastructure: a Fedora-based e-Research Framework

4th International Conference on Open RepositoriesThis presentation was part of the session : Fedora User Group PresentationsDate: 2009-05-20 03:30 PM – 05:00 PMeSciDoc is the open-source e-Research environment jointly created by the German Max Planck Society and FIZ Karlsruhe. It consists of a generic set of basic services ("eSciDoc Infrastructure") and various applications built on top of this infrastructure ("eSciDoc Solutions"). This presentation will focus on the eSciDoc Infrastructure, highlight the differences to the underlying Fedora repository, and demonstrate its powerful und application-centric programming model. In the end of 2008, we released version 1.0 of the eSciDoc Infrastructure. Digital Repositories undergo yet again a substantial change of paradigm. While they started several years ago with a library perspective, mainly focusing on publications, they are now becoming more and more a commodity tool for the workaday life of researchers. Quite often the repository itself is just a background service, providing storage, persistent identification, preservation, and discovery of the content. It is hidden from the end-user by means of specialized applications or services. Fedora's approach of providing a repository architecture rather than an end-user tool accommodates well to this evolution. eSciDoc, from the start of the project nearly five years ago, has emphasized this design pattern by separating backend services (eSciDoc Infrastructure) and front-end applications (eSciDoc Solutions)

Enabling Inter-Repository Access Management between iRODS and Fedora

4th International Conference on Open RepositoriesThis presentation was part of the session : Conference PresentationsDate: 2009-06-04 08:30 AM – 10:00 AMMany digital repositories have been built using different technologies such as Fedora and the integrated Rule-Oriented Data System (iRODS). This paper analyzes both the Fedora and iRODS technologies to understand how to integrate the two systems to enable cross-repository data sharing. The areas considered include the digital object model, services, management of distributed storage, external data resources, and policy enforcement.National Science Foundatio

DRIVER Technology Watch Report

This report is part of the Discovery Workpackage (WP4) and is the third report out of four deliverables. The objective of this report is to give an overview of the latest technical developments in the world of digital repositories, digital libraries and beyond, in order to serve as theoretical and practical input for the technical DRIVER developments, especially those focused on enhanced publications. This report consists of two main parts, one part focuses on interoperability standards for enhanced publications, the other part consists of three subchapters, which give a landscape picture of current and surfacing technologies and communities crucial to DRIVER. These three subchapters contain the GRID, CRIS and LTP communities and technologies. Every chapter contains a theoretical explanation, followed by case studies and the outcomes and opportunities for DRIVER in this field

Pathways: Augmenting interoperability across scholarly repositories

In the emerging eScience environment, repositories of papers, datasets, software, etc., should be the foundation of a global and natively-digital scholarly communications system. The current infrastructure falls far short of this goal. Cross-repository interoperability must be augmented to support the many workflows and value-chains involved in scholarly communication. This will not be achieved through the promotion of single repository architecture or content representation, but instead requires an interoperability framework to connect the many heterogeneous systems that will exist. We present a simple data model and service architecture that augments repository interoperability to enable scholarly value-chains to be implemented. We describe an experiment that demonstrates how the proposed infrastructure can be deployed to implement the workflow involved in the creation of an overlay journal over several different repository systems (Fedora, aDORe, DSpace and arXiv).Comment: 18 pages. Accepted for International Journal on Digital Libraries special issue on Digital Libraries and eScienc

RODA - A Service-Oriented Repository to Preserve Authentic Digital Objects

4th International Conference on Open RepositoriesThis presentation was part of the session : Fedora User Group PresentationsDate: 2009-05-20 03:30 PM – 05:00 PMIn mid 2006, the Portuguese National Archives (Directorate-General of the Portuguese Archives) launched a project called RODA (Repository of Authentic Digital Objects) aiming at identifying and bringing together all the necessary technology, human resources and political support to carry out long-term preservation of digital materials being produced by the Portuguese public administration. As part of the original goals of RODA was the development of a digital repository capable of ingesting, managing and providing access to the various types of digital objects produced by national public institutions. The development of such repository should be supported by open-source technologies and, as much as possible, be based on existing standards. Since RODA is nearly finished, this communication aims at describing its main results.European Union; POAP; Ministry of Culture; Portuguese Republi