Literatur zur Informationserschließung

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: 04. Juni 2021)

Suchergebnisse

• 1
  Barkey, R. ; Hinrichs, E. ; Hoppermann, C. ; Trippel, T. ; Zinn, C.: Komponenten-basierte Metadatenschemata und Facetten-basierte Suche : ein flexibler und universeller Ansatz.
  In: Information und Wissen: global, sozial und frei? Proceedings des 12. Internationalen Symposiums für Informationswissenschaft (ISI 2011) ; Hildesheim, 9. - 11. März 2011. Hrsg.: J. Griesbaum, T. Mandl u. C. Womser-Hacker. Boizenburg : VWH, Verl. W. Hülsbusch, 2010. S.62-73.
  (Schriften zur Informationswissenschaft; Bd.58)
  
  Abstract: Wenn man verschiedenartige Forschungsdaten über Metadaten inhaltlich beschreiben möchte, sind bibliografische Angaben allein nicht ausreichend. Vielmehr benötigt man zusätzliche Beschreibungsmittel, die der Natur und Komplexität gegebener Forschungsressourcen Rechnung tragen. Verschiedene Arten von Forschungsdaten bedürfen verschiedener Metadatenprofile, die über gemeinsame Komponenten definiert werden. Solche Forschungsdaten können gesammelt (z.B. über OAI-PMH-Harvesting) und mittels Facetten-basierter Suche über eine einheitliche Schnittstelle exploriert werden. Der beschriebene Anwendungskontext kann über sprachwissenschaftliche Daten hinaus verallgemeinert werden.
  
  Objekt: OAI-PMH
  
  
• 2
  Pieper, D. ; Wolf, S.: BASE - Eine Suchmaschine für OAI-Quellen und wissenschaftliche Webseiten.
  In: Information - Wissenschaft und Praxis. 58(2007) H.3, S.179-182.
  
  Abstract: Dieser Aufsatz beschreibt die Entwicklung der Suchmaschine BASE (Bielefeld Academic Search Engine) seit 2005. In dieser Zeit wurde der Index um ein Vielfaches ausgebaut und auch die Nutzungszahlen stiegen deutlich. Der Schwerpunkt liegt auf der Indexierung von Dokumentenservern, die ihre Daten über das "Protocol for Metadata Harvesting" (OAI-PMH) bereitstellen. Im Gegensatz zu speziellen OAI-Suchmaschine wie OAIster verfügt BASE jedoch über weitergehende Suchmöglichkeiten und indexiert auch wissenschaftliche Webseiten mit Hilfe eines integrierten Web-Crawlers und andere Quellen, wie zum Beispiel den Bibliothekskatalog der Universitätsbibliothek Bielefeld. BASE kommt darüber hinaus als Suchsystem auch in anderen Bereichen, zum Beispiel im Bielefeld eScholarship Repository, als Suchmaschine der Universität Bielefeld und im EU-Projekt DRIVER via Schnittstellen zum BASE-Index zum Einsatz.
  
  Themenfeld: Suchmaschinen
  Objekt: BASE ; OAI-PMH
  Land/Ort: Bielefeld
  
  
• 3
  Van 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.
  
  Objekt: OAI-PMH
  
  
• 4
  Ward, J.: Unqualified Dublin Core usage in OAI-PMH data providers.
  In: OCLC systems and services. 20(2004) no.1, S.40-47.
  
  Themenfeld: Metadaten
  Objekt: Dublin core ; OAI-PMH
  
  
• 5
  Simeoni, F.: ¬The case for metadata harvesting : how do the library-based services compare with the expert services?.
  In: Library review. 53(2004) no.5, S.255-258.
  
  Abstract: Metadata harvesting is an increasingly popular model of interaction between the mutually autonomous parties of medium, medium-large federations of digital library services. With a harvesting protocol, in particular, resource descriptions locally available at each party can be served to remote applications for the implementation of federated services, such as resource discovery. This article offers a systematic explanation of the success of the model and its standard implementations in the context of current initiatives for national and international federations.
  
  Inhalt: Vgl. auch unter: http://www.emeraldinsight.com/10.1108/00242530410538382.
  
  Themenfeld: Verteilte bibliographische Datenbanken
  Objekt: OAI-PMH
  
  
• 6
  Nelson, M.L. ; Harrison, T.L. ; Rocker, J.A.: OAI and NASA's scientific and technical information.
  In: Library hi tech. 21(2003) no.2, S.140-150.
  
  Abstract: The Open Archives Initiative Protocol for Metadata Harvesting (OAI-PMH) is an evolving protocol and philosophy regarding interoperability for digital libraries (DLs). Previously, "distributed searching" models were popular for DL interoperability. However, experience has shown distributed searching systems across large numbers of DLs to be difficult to maintain in an Internet environment. The OAI-PMH is a move away from distributed searching, focusing on the arguably simpler model of "metadata harvesting". We detail NASA's involvement in defining and testing the OAI-PMH and experience to date with adapting existing NASA distributed searching DLs (such as the NASA Technical Report Server) to use the OAI-PMH and metadata harvesting. We discuss some of the entirely new DL projects that the OAI-PMH has made possible, such as the Technical Report Interchange Project. We explain the strategic importance of the OAI-PMH to the mission of NASA's Scientific and Technical Information Program.
  
  Inhalt: Vgl. auch unter: http://www.emeraldinsight.com/.
  
  Themenfeld: Metadaten
  Objekt: OAI-PMH ; NASA
  
  
• 7
  Lagoze, 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.
  
  Themenfeld: Metadaten
  Objekt: OAI-PMH
  
  
• 8
  Arms, C.R.: Available and useful : OAI at the Library of Congress.
  In: Library hi tech. 21(2003) no.2, S.129-139.
  
  Abstract: The Library of Congress (LC) was an early adopter of the OAI Protocol for Metadata Harvesting. The protocol allows LC to make digitized historical collections available for integration into other services. The protocol was straightforward to implement and the harvesting traffic has no perceptible effect on the primary users of the American Memory project. Now that services can integrate records for cultural heritage resources from many sources, it is time to build on that experience to develop better services. How should the scarce resources available to produce metadata be deployed to most advantage to support discovery in different contexts? How might metadata harvesting be exploited to support new interfaces and enhanced navigation among related resources in digital libraries? This article starts a conversation between metadata providers and service builders by describing LC's experience and questions that have surfaced.
  
  Inhalt: Vgl. auch unter: http://www.emeraldinsight.com/10.1108/07378830310491899.
  
  Themenfeld: Metadaten
  Objekt: OAI-PMH
  
  
• 9
  Shreeves, S.L. ; Kaczmarek, J.S. ; Cole, T.W.: Harvesting cultural heritage metadata using OAI Protocol.
  In: Library hi tech. 21(2003) no.2, S.159-161.
  
  Abstract: In July of 2001, with funding from the Andrew W. Mellon Foundation, the University of Illinois at Urbana-Champaign undertook a project to test the efficacy of using the Open Archives Initiative Protocol for Metadata Harvesting to construct a search and discovery service focused on information resources in the domain of cultural heritage. To date, the Illinois project has indexed over two million Dublin Core metadata records contributed by 39 metadata repositories in the museum, academic library, and digital library project communities. These records describe a mix of digital and analog primary content. Our analysis of these metadata records demonstrates wide divergence in descriptive metadata practices and the use and interpretation of Dublin Core metadata elements. Differences are particularly notable by community. This article provides an overview of the Illinois project, presents quantitative data about divergent metadata practices and element usage patterns, and details implications for metadata providers and harvesting services.
  
  Inhalt: Vgl. auch unter: http://www.emeraldinsight.com/10.1108/07378830310479802.
  
  Themenfeld: Metadaten
  Objekt: OAI-PMH
  
  
• 10
  Hagedorn, K.: OAIster: a "no dead ends" OAI service provider.
  In: Library hi tech. 21(2003) no.2, S.170-181.
  
  Abstract: OAIster, at the University of Michigan, University Libraries, Digital Library Production Service (DLPS), is an Andrew W. Mellon Foundation grant-funded project designed to test the feasibility of using the Open Archives Initiative Protocol for Metadata Harvesting (OAI-PMH) to harvest digital object metadata from multiple and varied digital object repositories and develop a service to allow end-users to access that metadata. This article describes in-depth the development of our system to harvest, store, transform the metadata into Digital Library eXtension Service (DLXS) Bibliographic Class format, build indexes and make the metadata searchable through an interface using the XPAT search engine. Results of the testing of our service and statistics on usage are reported, as well as the issues that we have encountered during our harvesting and transformation operations. The article closes by discussing the future improvements and potential of OAIster and the OAI-PMH protocol.
  
  Inhalt: Vgl. auch unter: http://www.emeraldinsight.com/10.1108/07378830310479811.
  
  Themenfeld: Metadaten
  Objekt: OAI-PMH
  
  
• 11
  Halbert, M.: ¬The Metascholar Initiative : AmericanSouth.Org and MetaArchive.Org.
  In: Library hi tech. 21(2003) no.2, S.182-198.
  
  Abstract: The MetaScholar Initiative is a collaborative endeavor to explore the feasibility and utility of scholarly portal services developed in conjunction with Open Archives Initiative (OAI) metadata harvesting technologies. The MetaScholar Initiative comprises two projects, the MetaArchive and AmericanSouth projects, both funded by grants from the Andrew W. Mellon Foundation totaling $600,000. These two projects have created two metadata aggregation networks connecting some 24 libraries, archives, museums, and electronic text centers. Each network has an associated portal being created under the guidance of teams composed of scholars, librarians, archivists, and technologists. The MetaScholar Initiative is studying issues such as metadata normalization, alternative forms of scholarly communication through portals, and the process of facilitating smaller archival institutions in providing better access to their collections through the OAI Protocol for Metadata Harvesting (OAI-PMH). The MetaScholar Initiative is based at Emory University in Atlanta, Georgia.
  
  Inhalt: Vgl. auch unter: http://www.emeraldinsight.com/10.1108/07378830310479820.
  
  Themenfeld: Metadaten
  Objekt: OAI-PMH
  
  
• 12
  Prom, C.J.: Reengineering archival access through the OAI protocols.
  In: Library hi tech. 21(2003) no.2, S.199-209.
  
  Abstract: The Open Archives Initiative (OAI) Protocol for Metadata Harvesting presents one promising method by which metadata regarding archives and manuscripts can be shared and made more interoperable with metadata from other sources. Against the background of archival descriptive theory and practice, this article outlines a method for exposing deep, hierarchical metadata from encoded archival description (EAD) files and assesses some theoretical and practical issues that will need to be confronted by institutions choosing to provide or harvest OAI records generated from EAD files. Using OAI on top of existing EAD implementations would allow institutions to repurpose their data and potentially reach more users but would also accelerate the process of reengineering archival access mechanisms. Archivists and technologists using OAI with EAD must pay careful attention to the necessity of preserving archival context and provenance.
  
  Inhalt: Vgl. auch unter: http://www.emeraldinsight.com/10.1108/07378830310479839.
  
  Themenfeld: Metadaten
  Objekt: OAI-PMH ; EAD
  Anwendungsfeld: Archive
  
  
• 13
  Van 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.
  
  Objekt: OAI-PMH
  
  
• 14
  Gladney, H.M. ; Bennett, J.L.: What do we mean by authentic? : what's the real McCoy?.
  In: D-Lib magazine. 9(2003) no.7/8, x S.
  
  Abstract: Authenticity is among digital document security properties needing attention. Literature focused on preservation reveals uncertainty - even confusion - about what we might mean by authentic. The current article provides a definition that spans vernacular usage of "authentic", ranging from digital documents through material artifacts to natural objects. We accomplish this by modeling entity transmission through time and space by signal sequences and object representations at way stations, and by carefully distinguishing objective facts from subjective values and opinions. Our model can be used to clarify other words that denote information quality, such as "evidence", "essential", and "useful". Digital documents are becoming important in most kinds of human activity. Whenever we buy something valuable, agree to a contract, design and build a machine, or provide a service, we should understand exactly what we intend and be ready to describe this as accurately as the occasion demands. This makes worthwhile whatever care is needed to devise definitions that are sufficiently precise and distinct from each other to explain what we are doing and to minimize community confusion. When we set out, some months ago, to describe answers to the open technical challenges of digital preservation, we took for granted the existence of a broad, unambiguous definition for authentic. Document authenticity is of fundamental importance not only for scholarly work, but also for practical affairs, including legal matters, regulatory requirements, military and other governmental information, and financial transactions. Trust, and evidence for deciding what can be trusted as authentic are considered in many works about digital preservation. These topics are broad, deep, and subtle, raising many questions. Among these, the current work addresses a single question, "What is a useful meaning of authentic or of authenticity for digital documents - a meaning that is not itself a source of confusion?" Progress in managing digital information would be hampered without a clear answer that is sufficiently objective to guide the evaluation of communication and computing technology. Our approach to constructing an answer to this question is to break each object transmission into pieces whose treatment we can describe explicitly and with attention to potential imperfections.
  
  Inhalt: Mit Abbildungen zur digitalen Authentizität
  
  Anmerkung: Vgl.: http://dlib.ukoln.ac.uk/dlib/july03/gladney/07gladney.html.
  
  Objekt: OAI-PMH