Search (19 results, page 1 of 1)

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Date

30.11.1996 13:22:37

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Date

22. 6.2018 14:22:02

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Abstract

Knowledge Organization Systems can comprise thesauri and other controlled lists of keywords, ontologies, classification systems, clustering approaches, taxonomies, gazetteers, dictionaries, lexical databases, concept maps/spaces, semantic road maps, etc. These schemas enable knowledge structuring and management, knowledge-based data processing and systematic access to knowledge structures in individual collections and digital libraries. Used as interactive information services on the Internet they have an increased potential to support the description, discovery and retrieval of heterogeneous information resources and to contribute to an overall resource discovery infrastructure

Content

This issue of the Journal of Digital Information evolved from a workshop on Networked Knowledge Organization Systems (NKOS) held at the Fourth European Conference on Research and Advanced Technology for Digital Libraries (ECDL2000) in Lisbon during September 2000. The focus of the workshop was European NKOS initiatives and projects and options for global cooperation. Workshop organizers were Martin Doerr, Traugott Koch, Dougles Tudhope and Repke de Vries. This group has, with Traugott Koch as the main editor and with the help of Linda Hill, cooperated in the editorial tasks for this special issue

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Date

5. 1.2008 19:22:48

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Date

22. 6.2018 14:29:46

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Date

22. 1.2022 14:01:14

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Abstract

Noch ist nicht entschieden mit welcher Vehemenz das sogenannte Web 2.0 die Bibliotheken verändern wird. Allerdings wird hier und da bereits mit Bezugnahme auf das sogenannte Semantic Web von einer dritten und mancherorts von einer vierten Generation des Web gesprochen. Der Vortrag hinterfragt kritisch, welche Konzepte sich hinter diesen Bezeichnungen verbergen und geht der Frage nach, welche Herausforderungen eine Übernahme dieser Konzepte für die Bibliothekswelt mit sich bringen würde. Vgl. insbes. Folie 22 mit einer Darstellung von der Entwicklung vom Web 1.0 zum Web 4.0

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Content

1 Introduction / 2 Method overview / 3 Ei thesaurus preprocessing / 4 Automatic classification process: 4.1 Matching -- 4.2 Weighting -- 4.3 Preparation for display / 5 Results of the classification process / 6 Evaluations / 7 Software / 8 Other applications / 9 Experiments with universal classification systems / References / Appendix A: Ei classification service: Software / Appendix B: Use of the classification software as subject filter in a WWW harvester.

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Abstract

"Zweimal täglich googeln" empfiehlt Mathias Bröckers in seinem Buch "Verschwörungen, Verschwörungstheorien und die Geheimnisse des 11.9.". Der Band gilt den gutbürgerlichen Medien von FAZ bis Spiegel als Musterbeispiel krankhafter Verschwörungstheorie. Dabei wollte der Autor - nach eigenem Bekunden - keine Verschwörungstheorie zum 11. September vorlegen, sondern lediglich auf Widersprüche und Fragwürdigkeiten in den amtlichen Darstellungen und Erklärungen der US-Regierung zu jenem Terroranschlag hinweisen. Unabhängig davon, wie ernst diese Einlassungen des Autors zu nehmen sind, ist der "Fall Bröckers" für die Erforschung von Verschwörungstheorien unter zwei Aspekten interessant: Erstens geht der Band auf ein [[extern] ] konspirologisches Tagebuch zurück, das der Autor zwischen dem 13. September 2001 und dem 22. März 2002 für das Online-Magazin Telepolis verfasst hat; zweitens behauptet Bröckers in der Einleitung zum Buch, dass er für seine Arbeit ausschließlich über das Netz zugängliche Quellen genutzt habe. Hierbei hätte ihm Google unverzichtbare Dienste geleistet: Um an die Informationen in diesem Buch zu kommen, musste ich weder über besondere Beziehungen verfügen, noch mich mit Schlapphüten und Turbanträgern zu klandestinen Treffen verabreden - alle Quellen liegen offen. Sie zu finden, leistete mir die Internet-Suchmaschine Google unschätzbare Dienste. Mathias Bröckers

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Date

5. 7.2015 22:02:31

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Date

23. 3.2018 13:41:22

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Abstract

Directed Query Engines, an emerging class of search engine specifically designed to access distributed resources on the deep web, offer the opportunity to create inexpensive digital libraries. Already, one such engine, Distributed Explorer, has been used to select and assemble high quality information resources and incorporate them into publicly available systems for the physical sciences. By nesting Directed Query Engines so that one query launches several other engines in a cascading fashion, enormous virtual collections may soon be assembled to form a comprehensive information infrastructure for the physical sciences. Once a Directed Query Engine has been configured for a set of information resources, distributed alerts tools can provide patrons with personalized, profile-based notices of recent additions to any of the selected resources. Due to the potentially enormous size and scope of Directed Query Engine applications, consideration must be given to issues surrounding the representation of large quantities of information from multiple, heterogeneous sources.

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Abstract

Ontologies are currently a buzzword in many communities, hailed as a mechanism for making better use of the Web. They offer a shared definition of a domain that can be understood by computers, enabling them to complete more meaningful tasks. Although ontologies of different descriptions have been in development and use for some time, it is their potential as a key technology in the Semantic Web which is responsible for the current wave of interest. Communities have different expectations of the Semantic Web and how it will be realised, but it is generally believed that ontologies will play a major role. In light of their potential in this new context, much current effort is focusing an developing languages and tools. OWL (Web Ontology Language) has recently become a standard, and builds an top of existing Web languages such as XML and RDF to offer a high degree of expressiveness. A variety of tools are emerging for creating, editing and managing ontologies in OWL. Ontologies have a range of potential benefits and applications in further and higher education, including the sharing of information across educational systems, providing frameworks for learning object reuse, and enabling intelligent and personalised student support. The difficulties inherent in creating a model of a domain are being tackled, and the communities involved in ontology development are working together to achieve their vision of the Semantic Web. This Technology and Standards Watch report discusses ontologies and their role in the Semantic Web, with a special focus an their implications for teaching and learning. This report will introduce ontologies to the further and higher education community, explaining why they are being developed, what they hope to achieve, and their potential benefits to the community. Current ontology tools and standards will be described, and the emphasis will be an introducing the technology to a new audience and exploring its risks and potential applications in teaching and learning. At a time when educational programmes based an ontologies are starting to be developed, the author hopes to increase understanding of the key issues in the wider community.

Content

"Ontologies promise "a shared and common understanding of a domain that can be communicated between people and application systems" [1]. They attempt to formulate a thorough and rigorous representation of a domain by specifying all of its concepts, the relationships between them and the conditions and regulations of the domain. Ontologies can express hierarchical links between entities as well as other semantic relations. An example of part of an ontology is provided in Figure 1, in which it is specified not only that an author is a person and that a book is a publication, but also that an author writes a book and that a book has chapters."

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Abstract

The creation of services linking related information entities is an area that is attracting an ever increasing interest in the ongoing development of the World Wide Web in general, and of research-related information systems in particular. Currently, both practice and theory point at linking services as being a major domain for innovation enabled by digital communication of content. Publishers, subscription agents, researchers and libraries are all looking into ways to create added value by linking related information entities, as such presenting the information within a broader context estimated to be relevant to the users of the information. This is the first of two articles in D-Lib Magazine on this topic. This first part describes the current state-of-the-art and contrasts various approaches to the problem. It identifies static and dynamic linking solutions as well as open and closed linking frameworks. It also includes an extensive bibliography. The second part, SFX, a Generic Linking Solution describes a system that we have developed for linking in a hybrid working environment. The creation of services linking related information entities is an area that is attracting an ever increasing interest in the ongoing development of the World Wide Web in general, and of research-related information systems in particular. Although most writings on electronic scientific communication have touted other benefits, such as the increase in communication speed, the possibility to exchange multimedia content and the absence of limitations on the length of research papers, currently both practice and theory point at linking services as being a major opportunity for improved communication of content. Publishers, subscription agents, researchers and libraries are all looking into ways to create added-value by linking related information entities, as such presenting the information within a broader context estimated to be relevant to the users of the information.

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Date

21. 4.2002 10:22:31

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Date

24.10.2008 14:19:22

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Abstract

The W3C OWL Web Ontology Language has been a W3C recommendation since 2004, and specification of its successor OWL 2 is being finalised. OWL plays an important role in an increasing number and range of applications and as experience using the language grows, new ideas for further extending its reach continue to be proposed. The OWL: Experiences and Direction (OWLED) workshop series is a forum for practitioners in industry and academia, tool developers, and others interested in OWL to describe real and potential applications, to share experience, and to discuss requirements for language extensions and modifications. The workshop will bring users, implementors and researchers together to measure the state of need against the state of the art, and to set an agenda for research and deployment in order to incorporate OWL-based technologies into new applications. This year's 2009 OWLED workshop will be co-located with the Eighth International Semantic Web Conference (ISWC), and the Third International Conference on Web Reasoning and Rule Systems (RR2009). It will be held in Chantilly, VA, USA on October 23 - 24, 2009. The workshop will concentrate on issues related to the development and W3C standardization of OWL 2, and beyond, but other issues related to OWL are also of interest, particularly those related to the task forces set up at OWLED 2007. As usual, the workshop will try to encourage participants to work together and will give space for discussions on various topics, to be decided and published at some point in the future. We ask participants to have a look at these topics and the accepted submissions before the workshop, and to prepare single "slides" that can be presented during these discussions. There will also be formal presentation of submissions to the workshop.

Content

Demo/Position Papers * Conjunctive Query Answering in Distributed Ontology Systems for Ontologies with Large OWL ABoxes, Xueying Chen and Michel Dumontier. * Node-Link and Containment Methods in Ontology Visualization, Julia Dmitrieva and Fons J. Verbeek. * A JC3IEDM OWL-DL Ontology, Steven Wartik. * Semantically Enabled Temporal Reasoning in a Virtual Observatory, Patrick West, Eric Rozell, Stephan Zednik, Peter Fox and Deborah L. McGuinness. * Developing an Ontology from the Application Up, James Malone, Tomasz Adamusiak, Ele Holloway, Misha Kapushesky and Helen Parkinson.

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Abstract

This second edition is an update and expansion of the original April 1998 edition. It contains more of everything. In particular, the resources section has been expanded and updated. This document is designed to help those who are contemplating setting up a digital library. Whether this is a first time computerization effort or an extension of an existing library's services, there are questions to be answered, deci-sions to be made, and work to be done. This document covers all those stages and more. The first section (Chapter 1) is a series of questions to ask yourself and your organization. The questions are designed generally to raise issues rather than to provide definitive answers. The second section (Chapters 2-5) discusses the planning and implementation of a digital library. It raises some issues which are specific, and contains information to help answer the specifics and a host of other aspects of a digital li-brary project. The third section (Chapters 6 -7) includes resources and a look at current research, existing digital library systems, and the future. These chapters enable you to find additional resources and help, as well as show you where to look for interesting examples of the current state of the art

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Abstract

In the present work we discuss opportunities, problems, tools and techniques encountered when interconnecting discipline-specific subject classifications, primarily organized as search devices in bibliographic databases, with general classifications originally devised for book shelving in public libraries. We first state the fundamental distinction between topical (or subject) classifications and object classifications. Then we trace the structural limitations that have constrained subject classifications since their library origins, and the devices that were used to overcome the gap with genuine knowledge representation. After recalling some general notions on structure, dynamics and interferences of subject classifications and of the objects they refer to, we sketch a synthetic overview on discipline-specific classifications in Mathematics, Computing and Physics, on one hand, and on general classifications on the other. In this setting we present The Scientific Classifications Page, which collects groups of Web pages produced by a pool of software tools for developing hypertextual presentations of single or paired subject classifications from sequential source files, as well as facilities for gathering information from KWIC lists of classification descriptions. Further we propose a concept-oriented methodology for interconnecting subject classifications, with the concrete support of a relational analysis of the whole Mathematics Subject Classification through its evolution since 1959. Finally, we recall a very basic method for interconnection provided by coreference in bibliographic records among index elements from different systems, and point out the advantages of establishing the conditions of a more widespread application of such a method. A part of these contents was presented under the title Mathematics Subject Classification and related Classifications in the Digital World at the Eighth International Conference Crimea 2001, "Libraries and Associations in the Transient World: New Technologies and New Forms of Cooperation", Sudak, Ukraine, June 9-17, 2001, in a special session on electronic libraries, electronic publishing and electronic information in science chaired by Bernd Wegner, Editor-in-Chief of Zentralblatt MATH.