Diese Datenbank enthält über 40.000 Dokumente zu Themen aus den Bereichen Formalerschließung – Inhaltserschließung – Information Retrieval.
© 2015 W. Gödert, TH Köln, Institut für Informationswissenschaft / Powered by litecat, BIS Oldenburg (Stand: 28. April 2022)
1Sande, M. Vander ; Verborgh, R. ; Hochstenbach, P. ; Van de Sompel, H.: Toward sustainable publishing and querying of distributed Linked Data archives.
In: Journal of documentation. 74(2018) no.1, S.195-222.
Abstract: Purpose The purpose of this paper is to detail a low-cost, low-maintenance publishing strategy aimed at unlocking the value of Linked Data collections held by libraries, archives and museums (LAMs). Design/methodology/approach The shortcomings of commonly used Linked Data publishing approaches are identified, and the current lack of substantial collections of Linked Data exposed by LAMs is considered. To improve on the discussed status quo, a novel approach for publishing Linked Data is proposed and demonstrated by means of an archive of DBpedia versions, which is queried in combination with other Linked Data sources. Findings The authors show that the approach makes publishing Linked Data archives easy and affordable, and supports distributed querying without causing untenable load on the Linked Data sources. Research limitations/implications The proposed approach significantly lowers the barrier for publishing, maintaining, and making Linked Data collections queryable. As such, it offers the potential to substantially grow the distributed network of queryable Linked Data sources. Because the approach supports querying without causing unacceptable load on the sources, the queryable interfaces are expected to be more reliable, allowing them to become integral building blocks of robust applications that leverage distributed Linked Data sources. Originality/value The novel publishing strategy significantly lowers the technical and financial barriers that LAMs face when attempting to publish Linked Data collections. The proposed approach yields Linked Data sources that can reliably be queried, paving the way for applications that leverage distributed Linked Data sources through federated querying.
Inhalt: Vgl.: http://www.emeraldinsight.com/doi/full/10.1108/JD-03-2017-0040.
2Pepe, A. ; Mayernik, M. ; Borgman, C.L. ; Van de Sompel, H.: From artifacts to aggregations : modeling scientific life cycles on the semantic Web.
In: Journal of the American Society for Information Science and Technology. 61(2010) no.3, S.567-582.
Abstract: In the process of scientific research, many information objects are generated, all of which may remain valuable indefinitely. However, artifacts such as instrument data and associated calibration information may have little value in isolation; their meaning is derived from their relationships to each other. Individual artifacts are best represented as components of a life cycle that is specific to a scientific research domain or project. Current cataloging practices do not describe objects at a sufficient level of granularity nor do they offer the globally persistent identifiers necessary to discover and manage scholarly products with World Wide Web standards. The Open Archives Initiative's Object Reuse and Exchange data model (OAI-ORE) meets these requirements. We demonstrate a conceptual implementation of OAI-ORE to represent the scientific life cycles of embedded networked sensor applications in seismology and environmental sciences. By establishing relationships between publications, data, and contextual research information, we illustrate how to obtain a richer and more realistic view of scientific practices. That view can facilitate new forms of scientific research and learning. Our analysis is framed by studies of scientific practices in a large, multidisciplinary, multi-university science and engineering research center, the Center for Embedded Networked Sensing.
3Doerr, M. ; Gradmann, S. ; Hennicke, S. ; Isaac, A. ; Meghini, C. ; Van de Sompel, H.: ¬The Europeana Data Model (EDM).
Abstract: The Europeana Data Model (EDM) is a new approach towards structuring and representing data delivered to Europeana by the various contributing cultural heritage institutions. The model aims at greater expressivity and flexibility in comparison to the current Europeana Semantic Elements (ESE), which it is destined to replace. The design principles underlying the EDM are based on the core principles and best practices of the Semantic Web and Linked Data efforts to which Europeana wants to contribute. The model itself builds upon established standards like RDF(S), OAI-ORE, SKOS, and Dublin Core. It acts as a common top-level ontology which retains original data models and information perspectives while at the same time enabling interoperability. The paper elaborates on the aforementioned aspects and the design principles which drove the development of the EDM.
Inhalt: Vortrag im Rahmen der Session 93. Cataloguing der WORLD LIBRARY AND INFORMATION CONGRESS: 76TH IFLA GENERAL CONFERENCE AND ASSEMBLY, 10-15 August 2010, Gothenburg, Sweden - 149. Information Technology, Cataloguing, Classification and Indexing with Knowledge Management
Themenfeld: Information Gateway ; Datenformate
Objekt: Europeana ; EDM
4Van de Sompel, H.: Thoughts about repositories, use, and re-use.
Inhalt: Vortrag "One more step towards the European digital library: International Conference, Deutsche Nationalbibliothek, Frankfurt am Main 31 January - 1 February 2008.
Themenfeld: Semantic Web
5Johan Bollen, J. ; Van de Sompel, H.: Usage impact factor : the effects of sample characteristics on usage-based impact metrics.
In: Journal of the American Society for Information Science and Technology. 59(2008) no.1, S.136-149.
Abstract: There exist ample demonstrations that indicators of scholarly impact analogous to the citation-based ISI Impact Factor can be derived from usage data; however, so far, usage can practically be recorded only at the level of distinct information services. This leads to community-specific assessments of scholarly impact that are difficult to generalize to the global scholarly community. In contrast, the ISI Impact Factor is based on citation data and thereby represents the global community of scholarly authors. The objective of this study is to examine the effects of community characteristics on assessments of scholarly impact from usage. We define a journal Usage Impact Factor that mimics the definition of the Thomson Scientific ISI Impact Factor. Usage Impact Factor rankings are calculated on the basis of a large-scale usage dataset recorded by the linking servers of the California State University system from 2003 to 2005. The resulting journal rankings are then compared to the Thomson Scientific ISI Impact Factor that is used as a reference indicator of general impact. Our results indicate that the particular scientific and demographic characteristics of a discipline have a strong effect on resulting usage-based assessments of scholarly impact. In particular, we observed that as the number of graduate students and faculty increases in a particular discipline, Usage Impact Factor rankings will converge more strongly with the ISI Impact Factor.
6Van de Sompel, H. ; Nelson, M.L. ; Lagoze, C. ; Warner, S.: Resource harvesting within the OAI-PMH framework.
In: D-Lib magazine. 10(2004) no.12, x S.
Abstract: Motivated by preservation and resource discovery, we examine how digital resources, and not just metadata about resources, can be harvested using the Open Archives Initiative Protocol for Metadata Harvesting (OAI-PMH). We review and critique existing techniques for identifying and gathering digital resources using metadata harvested through the OAI-PMH. We introduce an alternative solution that builds on the introduction of complex object formats that provide a more accurate way to describe digital resources. We argue that the use of complex object formats as OAI-PMH metadata formats results in a reliable and attractive approach for incremental harvesting of resources using the OAI-PMH.
Anmerkung: Vgl.: http://dlib.ukoln.ac.uk/dlib/december04/vandesompel/12vandesompel.html.
7Lagoze, C. ; Van de Sompel, H.: ¬The making of the Open Archives Initiative Protocol for Metadata Harvesting.
In: Library hi tech. 21(2003) no.2, S.118-128.
Abstract: The authors, who jointly serve as the Open Archives Initiative (OAI) executive, reflect an the three-year history of the OAI. Three years of technical work recently culminated in the release of a stabie production version 2 of the OAI Protocol for Metadata Harvesting (OAI-PMH). This technical product, the work that led up to it, and the process that made it possible have attracted some favor from the digital library and information community. The paper explores a number of factors in the history of the OAI that the authors believe have contributed to this positive response. The factors include focus an a defined problem Statement, an operational model in which strong leadership is balanced with solicited participation, a healthy dose of community building and Support, and sensible technical decisions.
Inhalt: Vgl. auch unter: http://www.emeraldinsight.com/10.1108/07378830310479776.
8Van de Sompel, H. ; Young, J.A. ; Hickey, T.B.: Using the OAI-PMH ... differently.
In: D-Lib magazine. 9(2003) no.7/8, x S.
Abstract: The Open Archives Initiative's Protocol for Metadata Harvesting (OAI-PMH) was created to facilitate discovery of distributed resources. The OAI-PMH achieves this by providing a simple, yet powerful framework for metadata harvesting. Harvesters can incrementally gather records contained in OAI-PMH repositories and use them to create services covering the content of several repositories. The OAI-PMH has been widely accepted, and until recently, it has mainly been applied to make Dublin Core metadata about scholarly objects contained in distributed repositories searchable through a single user interface. This article describes innovative applications of the OAI-PMH that we have introduced in recent projects. In these projects, OAI-PMH concepts such as resource and metadata format have been interpreted in novel ways. The result of doing so illustrates the usefulness of the OAI-PMH beyond the typical resource discovery using Dublin Core metadata. Also, through the inclusion of XSL1 stylesheets in protocol responses, OAI-PMH repositories have been directly overlaid with an interface that allows users to navigate the contained metadata by means of a Web browser. In addition, through the introduction of PURL2 partial redirects, complex OAI-PMH protocol requests have been turned into simple URIs that can more easily be published and used in downstream applications.
Anmerkung: Vgl.: http://dlib.ukoln.ac.uk/dlib/july03/young/07young.html.
9Van de Sompel, H. ; Beit-Arie, O.: Generalizing the OpenURL framework beyond references to scholarly works : the Bison-Futé model.
In: D-Lib magazine. 7(2001) nos.7/8, xx S.
Abstract: This paper introduces the Bison-Futé model, a conceptual generalization of the OpenURL framework for open and context-sensitive reference linking in the web-based scholarly information environment. The Bison-Futé model is an abstract framework that identifies and defines components that are required to enable open and context-sensitive linking on the web in general. It is derived from experience gathered from the deployment of the OpenURL framework over the course of the past year. It is a generalization of the current OpenURL framework in several aspects. It aims to extend the scope of open and context-sensitive linking beyond web-based scholarly information. In addition, it offers a generalization of the manner in which referenced items -- as well as the context in which these items are referenced -- can be described for the specific purpose of open and context-sensitive linking. The Bison-Futé model is not suggested as a replacement of the OpenURL framework. On the contrary: it confirms the conceptual foundations of the OpenURL framework and, at the same time, it suggests directions and guidelines as to how the current OpenURL specifications could be extended to become applicable beyond the scholarly information environment.
Anmerkung: Vgl.: http://dlib.ukoln.ac.uk/dlib/july01/vandesompel/07vandesompel.html.
Objekt: OpenURL ; Bison-Futé model
10Van de Sompel, H. ; Hochstenbach, P.: Reference linking in a hybrid library environment : part 2: SFX, a generic linking solution.
In: D-Lib magazine. 5(1999) no.4, xx S.
Abstract: This is the second part of two articles about reference linking in hybrid digital libraries. The first part, Frameworks for Linking described the current state-of-the-art and contrasted various approaches to the problem. It identified static and dynamic linking solutions, as well as open and closed linking frameworks. It also included an extensive bibliography. The second part describes our work at the University of Ghent to address these issues. SFX is a generic linking system that we have developed for our own needs, but its underlying concepts can be applied in a wide range of digital libraries. This is a description of the approach to the creation of extended services in a hybrid library environment that has been taken by the Library Automation team at the University of Ghent. The ongoing research has been grouped under the working title Special Effects (SFX). In order to explain the SFX-concepts in a comprehensive way, the discussion will start with a brief description of pre-SFX experiments. Thereafter, the basics of the SFX-approach are explained briefly, in combination with concrete implementation choices taken for the Elektron SFX-linking experiment. Elektron was the name of a modest digital library collaboration between the Universities of Ghent, Louvain and Antwerp.
Anmerkung: Vgl.: http://dlib.ukoln.ac.uk/dlib/april99/van_de_sompel/04van_de_sompel-pt2.html.
Themenfeld: Informationsmittel ; Internet
11Van de Sompel, H. ; Hochstenbach, P.: Reference linking in a hybrid library environment : part 3: generalizing the SFX solution in the "SFX@Ghent & SFX@LANL" experiment.
In: D-Lib magazine. 5(1999) no.10, xx S.
Abstract: This is the third part of our papers about reference linking in a hybrid library environment. The first part described the state-of-the-art of reference linking and contrasted various approaches to the problem. It identified static and dynamic linking solutions, open and closed linking frameworks as well as just-in-case and just-in-time linking. The second part introduced SFX, a dynamic, just-in-time linking solution we built for our own purposes. However, we suggested that the underlying concepts were sufficiently generic to be applied in a wide range of digital libraries. In this third part we show how this has been demonstrated conclusively in the "SFX@Ghent & SFX@LANL" experiment. In this experiment, local as well as remote distributed information resources of the digital library collections of the Research Library of the Los Alamos National Laboratory and the University of Ghent Library have been used as starting points for SFX-links into other parts of the collections. The SFX-framework has further been generalized in order to achieve a technology that can easily be transferred from one digital library environment to another and that minimizes the overhead in making the distributed information services that make up those libraries interoperable with SFX. This third part starts with a presentation of the SFX problem statement in light of the recent discussions on reference linking. Next, it introduces the notion of global and local relevance of extended services as well as an architectural categorization of open linking frameworks, also referred to as frameworks that are supportive of selective resolution. Then, an in-depth description of the generalized SFX solution is given.
Anmerkung: Vgl.: http://dlib.ukoln.ac.uk/dlib/october99/van_de_sompel/10van_de_sompel.html.
Themenfeld: Informationsmittel ; Internet
12Van de Sompel, H. ; Hochstenbach, P.: Reference linking in a hybrid library environment : part 1: frameworks for linking.
In: D-Lib magazine. 5(1999) no.4, xx S.
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.
Anmerkung: Vgl.: http://dlib.ukoln.ac.uk/dlib/april99/van_de_sompel/04van_de_sompel-pt1.html.
Themenfeld: Informationsmittel ; Internet