Designing Protocols in Support of Digital Library Componentization

Digital Libraries: Achievements, Challenges and Opportunities

Feng

Marsden

2006

Self Cite

Abstract. Digital library systems that once were mostly monolithic in construction are slowly making the transition to component-based models. However, it is not clear how best to design or construct the user interfaces to such systems -one alternative would be to create associated interface elements while another would be to create a separable interface layer. This paper discusses an attempt to do the latter by using current browser-based tools -recently named Ajax -in order to visually design the layouts, workflows and service connections of a user experience layer. Expert evaluators provided feedback during this process and the eventual level of functionality and usability of the proof-of-concept system demonstrate the inherent possibilities and relevance of the emerging Ajax technologies for not only the rendering or execution but also the design of browser-based Web applicatons, and digital library systems in particular.

Section: Service Oriented Digital Library Systemsmentioning

confidence: 99%

Customising Interfaces to Service-Oriented Digital Library Systems

Digital Libraries: Achievements, Challenges and Opportunities

Feng

Marsden

2006

Self Cite

“…The project uses the "odlsearch1" syntax, as specified in the ODL-Search protocol, in order to submit queries to its search system. Further communication among the mobile agents and data providers transparently utilize the XOAI-PMH protocol [14].…”

Section: Layering: Maidlmentioning

confidence: 99%

“…SOA, however, is easily applied to a finer granularity, where reuse and modularity of components are crucial. To bridge this gap, and translate the core principles of OAI-PMH to fine-grained interaction among small components of a larger digital library, the Open Digital Library (ODL) project defined a suite of protocols based on the widely accepted principles of OAI-PMH, but aimed at the needs of digital library subsystem interaction [13] [14].…”

Section: Introductionmentioning

confidence: 99%

Analysis and Evaluation of Service Oriented Architectures for Digital Libraries

Peer-to-Peer, Grid, and Service-Orientation in Digital Library Architectures

2005

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Abstract. The Service Oriented Architecture (SOA) that underlies the Web Services paradigm of computing is widely regarded as the future of distributed computing. The applicability of such an architecture for digital library systems is still uncertain, as evidenced by the fact that virtually none of the large open source projects (e.g., Greenstone, EPrints, DSpace) have adopted it for internal component structuring. In contrast, the Open Archives Initiative (OAI) has received much support in the DL community for its Protocol for Metadata Harvesting, one that in principle falls within the scope of SOA. As a natural extension, the Open Digital Library project carried the principles of the OAI forward into a set of experimental derived and related protocols to create a testbed for component-based digital library experiments. This paper discusses a series of experiments with these components to confirm that SOA and a service-oriented component architecture is indeed applicable to digital library systems, by evaluating issues of simplicity and understandability, reusability, extensibility and performance.

“…Because of the success of the Open Archives Initiative [28], we build upon the OAI Protocol for Metadata Harvesting (PMH, see [41]). In this regard, we adopt a 2 step approach [35].…”

Section: Definitionmentioning

confidence: 99%

Building Digital Libraries Made Easy: Toward Open Digital Libraries

Fox

Lecture Notes in Computer Science

Luo

2002

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Abstract. Digital libraries (DLs) promote a sharing culture among those who contribute and those who use resources. This same approach works when building Open Digital Libraries (ODLs). Leveraging the intellectual and practical investment made in the Open Archives Initiative through an eXtended Protocol for Metadata Harvesting (XPMH), one can build lightweight protocols to tie together key components that together make up the core of a DL. DL developers in various settings have learned how to apply this framework in a few hours. The ODL approach has been effective with the Computer Science Teaching Center (www.cstc.org), the Networked Digital Library of Theses and Dissertations (www.ndltd.org), and AmericanSouth.org. Hence, to support our Computing and Information Technology Interactive Digital Educational Library (www.citidel.org) and to provide a generic capability for other parts of the US National Science, technology, engineering, and mathematics education Digital Library (www.nsdl.org), we are developing a "DL-in-a-box" toolkit. When lightweight protocols, pools of components, and open standard reference models are combined carefully, as suggested in the OCKHAM discussions, both the DL user and developer communities can benefit from the principle of sharing.