An information network overlay architecture for the NSDL

Lagoze, Carl; Krafft, Dean B.; Jesuroga, Susan; Cramer, Ellen J.; Shin, Edwin

doi:10.1145/1065385.1065487

Cited by 5 publications

(8 citation statements)

References 20 publications

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“…This paper logically follows after those papers, providing an overview of the costs, problems, and experiences in supporting the metadata aggregation model over the past three years. It also is written at a time when the CI team is engaged in a major project to shift the architecture to a different, resource-centric, paradigm [21]. As such, it provides the opportunity to look back on the initial architecture from the perspective of lessons learned.…”

Section: Related Workmentioning

confidence: 99%

Metadata aggregation and "automated digital libraries"

Lagoze

Krafft

Cornwell

et al. 2006

Proceedings of the 6th ACM/IEEE-CS Joint Conference on Digital Libraries

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Over three years ago, the Core Integration team of the National Science Digital Library (NSDL) implemented a digital library based on metadata aggregation using Dublin Core and OAI-PMH. The initial expectation was that such low-barrier technologies would be relatively easy to automate and administer. While this architectural choice permitted rapid deployment of a production NSDL, our three years of experience have contradicted our original expectations of easy automation and low people cost. We have learned that alleged "low-barrier" standards are often harder to deploy than expected.In this paper we report on this experience and comment on the general cost, the functionality, and the ultimate effectiveness of this architecture.

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Section: Related Workmentioning

confidence: 99%

Metadata aggregation and "automated digital libraries"

Lagoze

Krafft

Cornwell

et al. 2006

Proceedings of the 6th ACM/IEEE-CS Joint Conference on Digital Libraries

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“…The conception of curriculum as a layer of contextualization overlaid on educational resources relates to research on overlay journals [21], information network overlay [14,15], and Open Archives Initiative -Object Reuse and Exchange (OAI-ORE) [16].…”

Section: Flexibly Adaptive Curriculummentioning

confidence: 99%

Curriculum overlay model for embedding digital resources

Khan

Maull

Sumner

2008

Proceedings of the 8th ACM/IEEE-CS Joint Conference on Digital Libraries

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This paper describes the design and implementation of a curriculum overlay model for the representation of adaptable curriculum using educational digital library resources. We focus on representing curriculum to enable the incorporation of digital resources into curriculum and curriculum sharing and customization by educators. We defined this model as a result of longitudinal studies on educators' development and customization of curriculum and user interface design studies of prototypes representing curriculum. Like overlay journals or the information network overlay model, our curriculum overlay model defines curriculum as a compound object with internal semantic relationships and relationships to digital library metadata describing resources. We validated this model by instantiating the model using science curriculum which uses digital library resources and using this instantiation within an application that, built on FEDORA, supports curriculum customization. Findings from this work can support the design of digital library services for customizing curriculum which embeds digital resources.

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“…A full description of the initial repository architecture of NCore can be found in [16,17], but we will briefly review the key concepts here. The rest of section 3 will discuss changes to the architecture and implementation as a result of two years of development and production experience since the initial report.…”

Section: The Repository and Data Modelmentioning

confidence: 99%

Ncore

Krafft

Birkland

Cramer

2008

Proceedings of the 8th ACM/IEEE-CS Joint Conference on Digital Libraries

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NCore is an open source architecture and software platform for creating flexible, collaborative digital libraries. NCore was developed by the National Science Digital Library (NSDL) project, and it serves as the central technical infrastructure for NSDL. NCore consists of a central Fedora-based digital repository, a specific data model, an API, and a set of backend services and frontend tools that create a new model for collaborative, contributory digital libraries. This paper describes NCore, presents and analyzes its architecture, tools and services; and reports on the experience of NSDL in building and operating a major digital library on it over the past year and the experience of the Digital Library for Earth Systems Education in porting their existing digital library and tools to the NCore platform.

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An information network overlay architecture for the NSDL

Cited by 5 publications

References 20 publications

Metadata aggregation and "automated digital libraries"

Metadata aggregation and "automated digital libraries"

Curriculum overlay model for embedding digital resources

Ncore

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