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Keynote:
From Centralized Systems to Flexible Content and Service Federations:
Promises & Challenges of Next Generation Digital Library
Architectures
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Erich Neuhold,
University of Vienna
Thomas
Risse, Claudia Niederée
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Abstract
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Although there are still numerous open research
issues, like e.g. long-term preservation, the area of Digital Library
has reached a certain state of maturity: core library functionality has
been agreed upon, metadata standards, services and harvesting protocols
have been established, and digital libraries for different kinds of
application domains and content types are in operation. In addition,
digital library management systems, like DSpace or Greenstone, which
offer a well-defined core set of digital library functionality like
metadata management, collection management, and search support, are on
the market. Digital libraries and digital library management systems
are typically implemented as Web-based client server systems.
Besides looking into the extension of DL functionality to better
support the scientist and his working process (e-Science) and the
provision enhanced support of the community by advanced (partly
semantic-enabled) services, the development of next generation digital
libraries is an active area of current DL research. Current plans for
next generation DL architectures are aiming for a transition from the
DL as an integrated, centrally controlled system to a dynamic
configurable federation of DL services and information collections.
This transition is inspired by new technology trends and developments.
This includes technologies like Web services and the Grid as well as
the success of new paradigms like Peer-to-Peer Networking and
Service-oriented Architectures. The transition is also driven by the
needs of the ''DL market'':
- better and adaptive tailoring of the content
and service offer of a DL to the needs of the respective community as
well as to the current service and content offer;
- more systematic exploitation of existing
resources like information collections, metadata collections, services,
and computational resources;
- opening up of DL technology to a wider
clientele by enabling more cost-effective digital libraries.
The use of Service-oriented Architectures, Grid infrastructures, and
the Peer-to-Peer approach for content and service provision has
implications for the realization of enhanced DL functionality. These
implications are mainly rooted in increased heterogeneity of content,
services and metadata, in the higher degree of distribution and
dynamics, as well as in the omission of a central control instance. On
one hand, these are opportunities for faster adaptability and better
and more multifarious DL services by enabling federative models for
content and service provision; on the other hand, these are new
challenges to ensure long-term, reliable, and quality-controlled DL
service provision that also exploits what technology promises.
This talk discusses the promises and challenges of next generation
Digital Library architectures revolving around information access. The
discussion is illustrated by looking into current European projects in
this area, DILIGENT and BRICKS.
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©
Copyright 2004, 2005, ECDL
e-Mail: office@ecdl2005.org
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