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: 28. April 2022)

Suchergebnisse

• 1
  Martín-Moncunill, D. ; García-Barriocanal, E. ; Sicilia, M.-A. ; Sánchez-Alonso, S.: Evaluating the practical applicability of thesaurus-based keyphrase extraction in the agricultural domain : insights from the VOA3R project.
  In: Knowledge organization. 42(2015) no.2, S.76-89.
  
  Abstract: The use of Knowledge Organization Systems (KOSs) in aggregated metadata collections facilitates the implementation of search mechanisms operating on the same term or keyphrase space, thus preparing the ground for improved browsing, more accurate retrieval and better user profiling. Automatic thesaurus-based keyphrase extraction appears to be an inexpensive tool to obtain this information, but the studies on its effectiveness are scattered and do not consider the practical applicability of these techniques compared to the quality obtained by involving human experts. This paper presents an evaluation of keyphrase extraction using the KEA software and the AGROVOC vocabulary on a sample of a large collection of metadata in the field of agriculture from the AGRIS database. This effort includes a double evaluation, the classical automatic evaluation based on precision and recall measures, plus a blind evaluation aimed to contrast the quality of the keyphrases extracted against expert-provided samples and against the keyphrases originally recorded in the metadata. Results show not only that KEA outperforms humans in matching the original keyphrases, but also that the quality of the keyphrases extracted was similar to those provided by humans.
  
  Inhalt: Vgl.: http://www.ergon-verlag.de/isko_ko/downloads/ko_42_2015_2_b.pdf.
  
  Themenfeld: Konzeption und Anwendung des Prinzips Thesaurus
  Wissenschaftsfach: Landbauwissenschaft
  
  
• 2
  Garcia-Barriocanal, E. ; Sicilia, M.A. ; Sanchez-Alonso, S.: Usability evaluation of ontology editors.
  In: Knowledge organization. 32(2005) no.1, S.1-9.
  
  Abstract: Ontology editors are software tools that allow the creation and maintenance of ontologies through a graphical user interface. As the semantic web effort grows, a larger community of users for this kind of tool is expected. New users include people not specifically skilled in the use of ontology formalisms. In consequence, the usability of ontology editors can be viewed as a key adoption precondition for semantic web technologies. In this paper, the usability evaluation of several representative ontology editors is described. This evaluation is carried out by combining a heuristic pre-assessment with a subsequent usertesting phase. The target population is comprised of people with no specific ontology-creation skills that have a general knowledge about domain modelling. For this kind of user, current editors are adequate for the creation and maintenance of simple ontologies. Also, there is room for improvement, especially in browsing mechanisms, help systems, and visualization metaphors.
  
  Objekt: Protégé 2000 1.6.2 ; OntoEdit 2.0 ; OILEd 2.2a ; KSL Ontology Editor ; WebOde 1.1 ; WebOnto ; KADS22