Metadata research drastically improved the resource discovery mechanism in accessing information from a large distributed environment. Even technological capabilities permit multiple metadata schemas for standardizing the structure and content of indexing information towards an efficient resource discovery. This paper presents the issues on standard metadata in order to pursue digital repositor...

In this paper we present the Virtual Language Observatory (VLO), a metadata-based portal for language resources. It is completely based on the Component Metadata (CMDI) and ISOcat standards. This approach allows for the use of heterogeneous metadata schemas while maintaining the semantic compatibility. We describe the metadata harvesting process, based on OAI-PMH, and the conversion from severa...

The Texas Digital Library is a cooperative initiative of Texas universities. One of TDL’s core services is a federated collection of ETDs from its member schools. As this collection grew, the need for tools to manage the content exchange from the local to the federated repository became evident. This paper presents our experiences adding harvesting support to the DSpace repository platform usin...

The NASA Langley Research Center Atmospheric Science Data Center (ASDC) has almost 2 petabytes of canonical earth science data. Despite this volume of data, the ASDC does not maintain the information resources derived from this data: publications, web pages, visualizations, etc. We present the preliminary results of a project that augments the holdings of the ASDC by using search engine APIs to...

The imperative demand on the description of semantic metadata and the processing of real-time data presents unique challenge to Grid Metadata Service. Grid Monitoring Architecture (GMA), which is a framework for dynamic data management, is limited by its conventional interface of relational database and therefore fails to address the problem of interoperability. Faced with the problem of metada...

This paper describes DEPTAL, an open and flexible framework for institutional repositories reusing open-source technology. DEPTAL is a collection-centric system that manages collections of documents in multiple copies and types. It can manage also users and groups of users, it supports authority control (subjects, authors, etc.), and can interoperate with other systems by interfaces such as OAI...

We present the results of a feasibility study using shared, existing, network-accessible infrastructure for repository replication. We utilize the SMTP and NNTP protocols to replicate both the metadata and the content of a digital library, using OAI-PMH to facilitate management of the archival process. We investigate how dissemination of repository contents can be piggybacked on top of existing...

Reusable educational resources became increasingly important for enhancing learning and teaching experiences, particularly in the medical domain where resources are particularly expensive to produce. With respect to this, research has aimed at improving interoperability across educational resources metadata repositories, which led to a fragmented landscape of competing metadata schemas, such as...

The two fundamental aims of managing educational resources are to enable resources to be reusable and interoperable and to enable Web-scale sharing of resources across learning communities. Currently, a variety of approaches have been proposed to expose and manage educational resources and their metadata on the Web. These are usually based on heterogeneous metadata standards and schemas, such a...

With the arrival of the new communication systems and the “disappearance” of the borderlines, new challenges emerged to scientific production and spreading. We recognized that great part of that production was unknown and its area of influence is limited. We stated what we already knew, that social sciences were under-represented in databases that determined “the great current of science” and t...