| 1. |
- Ebner, Hannes, 1981-, et al.
(författare)
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A Mashup-friendly Resource and Metadata Management Framework
- 2008
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Ingår i: Mash-Up Personal Learning Environments (MUPPLE'08). ; , s. 48-56
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Konferensbidrag (refereegranskat)abstract
- Mashups and mashed up Personal Learning Environments require easy to use frameworks to support the ease of creation of effective services.The focus of this paper1 lies on establishing a generic and mashup-friendly resource and metadata management. The assumption is that if we can find an appropriate level of generic functionality, the development of targeted tools (e.g. e-portfolios, PLEs, etc) will become a matter of user interface design and specialization. We hope that such a framework does not result in a single implementation but rather a wide variety of interoperable systems that leverage plenty of functionality. In this paper we look at already existing standards and initiatives and show why they are not sufficiently generic. We propose a framework and take recent developments into consideration. We also show an implementation and introduce a tangible use case.
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| 2. |
- Ebner, Hannes, 1981-, et al.
(författare)
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An information model for managing resources and their metadata
- 2014
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Ingår i: Semantic Web. - : IOS Press. - 1570-0844 .- 2210-4968. ; 5:3, s. 237-255
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Tidskriftsartikel (refereegranskat)abstract
- Today information is managed within increasingly complicated Web applications which often rely on similar information models. Finding a reusable and sufficiently generic information model for managing resources and their metadata would greatly simplify development of Web applications. This article presents such an information model, namely the Resource and Metadata Management Model (ReM3). The information model builds upon Web architecture and standards, more specifically the Linked Data principles when managing resources together with their metadata. It allows to express relations between metadata and to keep track of provenance and access control. In addition to this information model, the architecture of the reference implementation is described along with a Web application that builds upon it. To show the taken approach in practice, several real-world examples are presented as showcases. The information model and its reference implementation have been evaluated from several perspectives, such as the suitability for resource annotation, a preliminary scalability analysis and the adoption in a number of projects. This evaluation in various complementary dimensions shows that ReM3 has been successfully applied in practice and can be considered a serious alternative when developing Web applications where resources are managed along with their metadata.
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| 3. |
- Ebner, Hannes, 1981-, et al.
(författare)
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Collaborative Construction of Artifacts
- 2007
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Konferensbidrag (refereegranskat)abstract
- This paper describes an approach for collaborative construction of artifacts, such as e.g. graphical maps and annotatable text documents, without requiring write-access to a common single file. Our approach is applicable to any kind of artifacts that can be divided into separate contributions, where each one is authored and stored independently, and, on request, merged into the artifact. The goal is to move collaboration issues from the files where artifacts are expressed, to an information directory. This information directory manages information around artifacts and keeps track of existing contributions to artifacts. Our prototype of such an information directory, named Collaborilla, is designed to be a flexible service, which can be updated by anyone in a wiki-style manner. With this approach, viewing a collaboratively constructed artifact gives each viewer the control of including or excluding various contributions. Moreover, each viewer can easily choose to participate and provide a new contribution to the artifact without the other authors being aware of this. If information about this new contribution is published in the Collaborilla directory, the contribution will also be seen by others.
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| 4. |
- Ebner, Hannes, 1981-, et al.
(författare)
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Learning Object Annotation for Agricultural Learning Repositories
- 2009
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Ingår i: ICALT. - New York, USA : IEEE. ; , s. 438-442
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Konferensbidrag (refereegranskat)abstract
- This paper introduces a Web-based tool that has been developed to facilitate learning object annotation in agricultural learning repositories with IEEE LOM-compliant metadata. More specifically, it presents how an application profile of the IEEE LOM standard has been developed for the description of learning objects on organic agriculture and agroecology. Then, it describes the design and prototype development of the Organic.Edunet repository tool: a Web-based for annotating learning objects on organic agriculture and agroecology, organizing them in using a portfolio-like user interface in a learning repository, and then federating this repository with a network of agricultural learning repositories.
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| 5. |
- Ebner, Hannes, 1981-
(författare)
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Supporting loose forms of collaboration : Using Linked Data to realize an architecture for collective knowledge construction
- 2014
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Doktorsavhandling (övrigt vetenskapligt/konstnärligt)abstract
- This thesis is driven by the motivation to explore a way of working collaboratively that closely reflects the World Wide Web (WWW), more specifically the potential of the Web architecture built on Semantic Web technologies and Linked Data. The goal is to describe a generic approach and architecture that satisfies the needs for loose collaboration and collective knowledge construction as exemplified by the applications described in this thesis. This thesis focuses on a contribution-centric architecture which allows for flexible applications that support loose forms of collaboration.The first research question deals with how Web-based collective knowledge construction can be supported. The second research question explores the characteristics of collective knowledge construction with respect to the Open World Assumption (OWA). The OWA implies that complete knowledge about a subject cannot be assumed at any time, which is one of the most fundamental properties of the WWW. The third research question investigates how Semantic Web technologies be used in order to support such a contribution-centric architecture.The thesis and its underlying publications are of a technical character and are always grounded in theoretical models and considerations that have led to functional implementations. The research has evolved in iterative development processes and was explicitly directed at building applications that can be used in collaborative settings and that are based on standardized Web technologies. One of the main outcomes, an information model, was developed together with such an application and provides a number of novel approaches in the context in which it was designed.The validity of the presented research is supported by evaluations from different perspectives: a list of implemented applications and showcases, results from structured interviews that have investigated the suitability for various resource annotation processes, as well as scalability aspects.The thesis concludes that it is ultimately up to the application how "loose" the collaboration should be and to which extent the OWA is incorporated. The presented architecture provides a toolkit to support the development of loosely collaborative applications. The showcased applications allow the construction of collaborative conceptual models and to collaboratively annotate educational resources. They show the potential of the used technology stack and the introduced contribution-centric architecture that sits on top if it.
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| 6. |
- Grebner, Olaf, et al.
(författare)
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Collaborative Tasks using Metadata Conglomerates - The Social Part of the Semantic Desktop
- 2008
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Ingår i: Proceedings of I-SEMANTICS ’08Graz.
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Konferensbidrag (refereegranskat)abstract
- This paper presents an application that enables loose and ad-hoc task collaboration for knowledge work and explicitly integrates task metadata into the collaboration process. With the increasing availability of semantic desktop technology, knowledge workers (KWers) can organize their personal information in a formalized way, including tasks. In an organization, KWers need to collaboratively access task-related information and to collaboratively work on it. In such a scenario, today’s available collaboration support applications, e.g. enterprise collaboration systems like wikis, either sacrifice end-user experience or semantic richness when dealing with structured knowledge. The presented collaborative task management (TM) application circumvents this trade-off by showing how the Kasimir TM client and the Collaborilla collaboration server interact closely. The TM client supports the KWer’s personal TM and incorporates collaborative tasks. It invokes the collaboration server which centrally manages the collaborative tasks. It implements elaborated methods for metadata sharing and collaborative editing of this shared metadata. We present the detailed proposal for an underlying architecture of the application, review related work and conclude this paper by pointing out future work.
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| 7. |
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| 8. |
- Manouselis, Nikos, et al.
(författare)
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A Semantic Infrastructure to Support a Federation of Agricultural Learning Repositories
- 2008
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Ingår i: Proceedings - The 8th IEEE International Conference on Advanced Learning Technologies, ICALT 2008. - 9780769531670 ; , s. 117-119
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Konferensbidrag (refereegranskat)abstract
- This paper discusses how Semantic Web technologies are being adopted, specialized, and put in practice in order to set up a technical infrastructure that will facilitate sharing and reusing of learning resources. The case study is a federation of learning repositories with learning resources on agricultural topics, which is being developed in the context of the Organic.Edunet European initiative.
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| 9. |
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| 10. |
- Manouselis, Nikos, et al.
(författare)
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Architecture of the Organic.Edunet Web Portal
- 2009
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Ingår i: International Journal of Web Portals. - : Information Resources Management Association. - 1938-0194 .- 1938-0208. ; 1:1, s. 71-91
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Tidskriftsartikel (refereegranskat)abstract
- The use of Semantic Web technologies in educational Web portals has been reported to facilitate users 'search, access, and retrieval of learning resources. To achieve this, a number of different architectural components and services need to be harmonically combined and implemented. This article presents how this issue is dealt with in the context of a large-scale case study. More specifically, it describes the architecture behind the Organic. Edunet Web portal that aims to provide access to a federation of repositories with learning resources on agricultural topics. The various components of the architecture are presented and the supporting technologies are explained. In addition, the article focuses on how Semantic Web technologies are being adopted, specialized, and put in practice in order to facilitate ontology-aided sharing and reusing of learning resources.
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