Search (19 results, page 1 of 1)

  • × author_ss:"Koch, T."
  • × year_i:[1990 TO 2000}
  1. Koch, T.: Navigieren und Information Retrieval im Internet (1994) 0.01
    0.0050592623 = product of:
      0.0404741 = sum of:
        0.026369777 = weight(_text_:der in 92) [ClassicSimilarity], result of:
          0.026369777 = score(doc=92,freq=8.0), product of:
            0.06677957 = queryWeight, product of:
              2.2337668 = idf(docFreq=12875, maxDocs=44218)
              0.029895496 = queryNorm
            0.3948779 = fieldWeight in 92, product of:
              2.828427 = tf(freq=8.0), with freq of:
                8.0 = termFreq=8.0
              2.2337668 = idf(docFreq=12875, maxDocs=44218)
              0.0625 = fieldNorm(doc=92)
        0.014104321 = weight(_text_:information in 92) [ClassicSimilarity], result of:
          0.014104321 = score(doc=92,freq=6.0), product of:
            0.052480884 = queryWeight, product of:
              1.7554779 = idf(docFreq=20772, maxDocs=44218)
              0.029895496 = queryNorm
            0.2687516 = fieldWeight in 92, product of:
              2.4494898 = tf(freq=6.0), with freq of:
                6.0 = termFreq=6.0
              1.7554779 = idf(docFreq=20772, maxDocs=44218)
              0.0625 = fieldNorm(doc=92)
      0.125 = coord(2/16)
    
    Abstract
    Die verschiedenen Methoden und Instrumente des Navigierens bzw. des Information Retrieval im Internet werden anhand von Beispielen im Überblick vorgestellt. Der Schwerpunkt liegt dabei auf den drei verbreitesten Werkzeugen Gopher, WWW und WAIS. Schwächen un Defizite werden aus der Sicht des Endnutzers analysiert und einige notwendige bzw. wünschenswerte Verbesserungen benannt. Einige Initiativen und Vorschläge zur Weiterentwicklung der Werkzeuge im Netz, teilweise angeregt von einem Blick auf Navigierungs- und Retrievalinstrumente aus Forschung und Entwicklung werden beschrieben
    Source
    Information und Medienvielfalt: 16. Online-Tagung der DGD, Frankfurt am Main, 17.-19.5.1994. Proceedings. Hrsg.: W. Neubauer u. R. Schmidt
  2. Koch, T.; Oßwald, A.: Medienwechsel: Gedrucktes zur Orientierung in der elektronischen Vielfalt : einführende Veröffentlichungen zum Thema 'Internet' (1993) 0.00
    0.0033486728 = product of:
      0.026789382 = sum of:
        0.018646248 = weight(_text_:der in 555) [ClassicSimilarity], result of:
          0.018646248 = score(doc=555,freq=4.0), product of:
            0.06677957 = queryWeight, product of:
              2.2337668 = idf(docFreq=12875, maxDocs=44218)
              0.029895496 = queryNorm
            0.27922085 = fieldWeight in 555, product of:
              2.0 = tf(freq=4.0), with freq of:
                4.0 = termFreq=4.0
              2.2337668 = idf(docFreq=12875, maxDocs=44218)
              0.0625 = fieldNorm(doc=555)
        0.0081431335 = weight(_text_:information in 555) [ClassicSimilarity], result of:
          0.0081431335 = score(doc=555,freq=2.0), product of:
            0.052480884 = queryWeight, product of:
              1.7554779 = idf(docFreq=20772, maxDocs=44218)
              0.029895496 = queryNorm
            0.1551638 = fieldWeight in 555, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              1.7554779 = idf(docFreq=20772, maxDocs=44218)
              0.0625 = fieldNorm(doc=555)
      0.125 = coord(2/16)
    
    Abstract
    Immer häufiger werden das System 'Internet', die dort genutzten Programmfunktionen und Werkzeuge sowie die damit zugänglichen Informationsangebote in Fachdiskussionen und -veröffentlichungen vorgestellt. Als einführende Hilfsmittel und Ratgeber zur Information über dieses Netzwerk sowie zur eigentlichen Nutzung von Internet sind (neben in elektronischer Form vorliegenden Publikationen) mittlerweile mehrere einführende Printveröffentlichungen in englischer Sprache auf dem Markt. Drei dieser Publikationen werden im vorliegenden Artikel ausführlicher vorgestellt und bewertet. Zum besseren Verständnis des sachlichen Zusammenhangs ist der Rezension ein knapp gefaßter Überblick über die unter dem Begriff 'Internet' zusammengefaßten Funktionen und Informationsangebote vorangestellt.
  3. Koch, T.; Vizine-Goetz, D.: Automatic classification and content navigation support for Web services : DESIRE II cooperates with OCLC (1998) 0.00
    0.0029493833 = product of:
      0.047190133 = sum of:
        0.047190133 = product of:
          0.09438027 = sum of:
            0.09438027 = weight(_text_:engineering in 1568) [ClassicSimilarity], result of:
              0.09438027 = score(doc=1568,freq=4.0), product of:
                0.16061439 = queryWeight, product of:
                  5.372528 = idf(docFreq=557, maxDocs=44218)
                  0.029895496 = queryNorm
                0.58762026 = fieldWeight in 1568, product of:
                  2.0 = tf(freq=4.0), with freq of:
                    4.0 = termFreq=4.0
                  5.372528 = idf(docFreq=557, maxDocs=44218)
                  0.0546875 = fieldNorm(doc=1568)
          0.5 = coord(1/2)
      0.0625 = coord(1/16)
    
    Abstract
    Emerging standards in knowledge representation and organization are preparing the way for distributed vocabulary support in Internet search services. NetLab researchers are exploring several innovative solutions for searching and browsing in the subject-based Internet gateway, Electronic Engineering Library, Sweden (EELS). The implementation of the EELS service is described, specifically, the generation of the robot-gathered database 'All' engineering and the automated application of the Ei thesaurus and classification scheme. NetLab and OCLC researchers are collaborating to investigate advanced solutions to automated classification in the DESIRE II context. A plan for furthering the development of distributed vocabulary support in Internet search services is offered.
  4. Ardö, A.; Koch, T.: Wide-area information server (WAIS) as the hub of an electronic library service at Lund University (1993) 0.00
    0.0027629207 = product of:
      0.022103366 = sum of:
        0.009888667 = weight(_text_:der in 8459) [ClassicSimilarity], result of:
          0.009888667 = score(doc=8459,freq=2.0), product of:
            0.06677957 = queryWeight, product of:
              2.2337668 = idf(docFreq=12875, maxDocs=44218)
              0.029895496 = queryNorm
            0.14807922 = fieldWeight in 8459, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              2.2337668 = idf(docFreq=12875, maxDocs=44218)
              0.046875 = fieldNorm(doc=8459)
        0.0122147 = weight(_text_:information in 8459) [ClassicSimilarity], result of:
          0.0122147 = score(doc=8459,freq=8.0), product of:
            0.052480884 = queryWeight, product of:
              1.7554779 = idf(docFreq=20772, maxDocs=44218)
              0.029895496 = queryNorm
            0.23274569 = fieldWeight in 8459, product of:
              2.828427 = tf(freq=8.0), with freq of:
                8.0 = termFreq=8.0
              1.7554779 = idf(docFreq=20772, maxDocs=44218)
              0.046875 = fieldNorm(doc=8459)
      0.125 = coord(2/16)
    
    Abstract
    Electronic information sources are being collected at the Lund University Library within the areas of computer science, Internet use and environmental studies. Within each area there are several different types of sources e.g. the environment area has bibliographic information, journal content pages, a local directory database on environmental related research projects and an archive of articles from relevant electronic conferences. A seed-bank database is planned in collaboration with the Nordic Gene Bank. The popularity of the wide area information server is growing and there are several hundred available sources today, however, improvements need to be done with the possibilities to select sources and in the search and relevance-ranking algorithms
    Series
    Veröffentlichungen der Universitätsbibliothek Essen; 15
  5. Koch, T.; Ardö, A.; Noodén, L.: ¬The construction of a robot-generated subject index : DESIRE II D3.6a, Working Paper 1 (1999) 0.00
    0.0025280428 = product of:
      0.040448684 = sum of:
        0.040448684 = product of:
          0.08089737 = sum of:
            0.08089737 = weight(_text_:engineering in 1668) [ClassicSimilarity], result of:
              0.08089737 = score(doc=1668,freq=4.0), product of:
                0.16061439 = queryWeight, product of:
                  5.372528 = idf(docFreq=557, maxDocs=44218)
                  0.029895496 = queryNorm
                0.5036745 = fieldWeight in 1668, product of:
                  2.0 = tf(freq=4.0), with freq of:
                    4.0 = termFreq=4.0
                  5.372528 = idf(docFreq=557, maxDocs=44218)
                  0.046875 = fieldNorm(doc=1668)
          0.5 = coord(1/2)
      0.0625 = coord(1/16)
    
    Abstract
    This working paper describes the creation of a test database to carry out the automatic classification tasks of the DESIRE II work package D3.6a on. It is an improved version of NetLab's existing "All" Engineering database created after a comparative study of the outcome of two different approaches to collecting the documents. These two methods were selected from seven different general methodologies to build robot-generated subject indices, presented in this paper. We found a surprisingly low overlap between the Engineering link collections we used as seed pages for the robot and subsequently an even more surprisingly low overlap between the resources collected by the two different approaches. That inspite of using basically the same services to start the harvesting process from. A intellectual evaluation of the contents of both databases showed almost exactly the same percentage of relevant documents (77%), indicating that the main difference between those aproaches was the coverage of the resulting database.
  6. Koch, T.: Suchmaschinen im Internet (1996) 0.00
    0.0017480858 = product of:
      0.027969373 = sum of:
        0.027969373 = weight(_text_:der in 5281) [ClassicSimilarity], result of:
          0.027969373 = score(doc=5281,freq=4.0), product of:
            0.06677957 = queryWeight, product of:
              2.2337668 = idf(docFreq=12875, maxDocs=44218)
              0.029895496 = queryNorm
            0.4188313 = fieldWeight in 5281, product of:
              2.0 = tf(freq=4.0), with freq of:
                4.0 = termFreq=4.0
              2.2337668 = idf(docFreq=12875, maxDocs=44218)
              0.09375 = fieldNorm(doc=5281)
      0.0625 = coord(1/16)
    
    Abstract
    Darstellung zu den verschiedenen Möglichkeiten der inhaltlichen Suche im Internet
    Footnote
    Vortrag, gehalten auf der INETBIB-Tagung in Dortmund am 11.3.1996
  7. Koch, T.: Suchmaschinen im Internet (1996) 0.00
    0.0017480858 = product of:
      0.027969373 = sum of:
        0.027969373 = weight(_text_:der in 5454) [ClassicSimilarity], result of:
          0.027969373 = score(doc=5454,freq=4.0), product of:
            0.06677957 = queryWeight, product of:
              2.2337668 = idf(docFreq=12875, maxDocs=44218)
              0.029895496 = queryNorm
            0.4188313 = fieldWeight in 5454, product of:
              2.0 = tf(freq=4.0), with freq of:
                4.0 = termFreq=4.0
              2.2337668 = idf(docFreq=12875, maxDocs=44218)
              0.09375 = fieldNorm(doc=5454)
      0.0625 = coord(1/16)
    
    Abstract
    Darstellung der verschiedenen search engines zur sachlichen Suche im Internet
    Source
    Weiter auf dem Weg zur virtuellen Bibliothek! Bibliotheken nutzen das Internet. Erste INETBIB-Tagung in der Universitätsbibliothek Dortmund vom 11.-13. März 1996. 2., erw. Aufl
  8. Koch, T.; Knorz, G.: ¬Die Rolle der Bibliothek im Zeitalter des Internet : Provokation und Nachdenken (1995) 0.00
    0.001648111 = product of:
      0.026369777 = sum of:
        0.026369777 = weight(_text_:der in 1890) [ClassicSimilarity], result of:
          0.026369777 = score(doc=1890,freq=2.0), product of:
            0.06677957 = queryWeight, product of:
              2.2337668 = idf(docFreq=12875, maxDocs=44218)
              0.029895496 = queryNorm
            0.3948779 = fieldWeight in 1890, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              2.2337668 = idf(docFreq=12875, maxDocs=44218)
              0.125 = fieldNorm(doc=1890)
      0.0625 = coord(1/16)
    
  9. Koch, T.: Nutzung von Klassifikationssystemen zur verbesserten Beschreibung, Organisation und Suche von Internetressourcen (1998) 0.00
    0.001648111 = product of:
      0.026369777 = sum of:
        0.026369777 = weight(_text_:der in 1030) [ClassicSimilarity], result of:
          0.026369777 = score(doc=1030,freq=8.0), product of:
            0.06677957 = queryWeight, product of:
              2.2337668 = idf(docFreq=12875, maxDocs=44218)
              0.029895496 = queryNorm
            0.3948779 = fieldWeight in 1030, product of:
              2.828427 = tf(freq=8.0), with freq of:
                8.0 = termFreq=8.0
              2.2337668 = idf(docFreq=12875, maxDocs=44218)
              0.0625 = fieldNorm(doc=1030)
      0.0625 = coord(1/16)
    
    Abstract
    In den ersten Jahren der Internetdienste wurde auf Klassifikationen weitgehend verzichtet. Viele Anbieter argumentierten, daß diese wie auch andere Metadaten von der Entwicklung aufgrund der Volltextindices überholt sind. Inzwischen hat sich das Blatt gewendet: Die meisten der großen Suchdienste bieten eine mehr oder minder ausgefeilte Klassifikation an. eine Reihe von Internetdiensten verwendet etablierte Bibliotheksklassifikationssysteme; deren Einsatzbereiche, die Vor- und Nachteile sowie Anwendungsbeispiele sind Thema dieses Aufsatzes
  10. Koch, T.: Searching the Web : systematic overview over indexes (1995) 0.00
    0.0014567381 = product of:
      0.02330781 = sum of:
        0.02330781 = weight(_text_:der in 3205) [ClassicSimilarity], result of:
          0.02330781 = score(doc=3205,freq=4.0), product of:
            0.06677957 = queryWeight, product of:
              2.2337668 = idf(docFreq=12875, maxDocs=44218)
              0.029895496 = queryNorm
            0.34902605 = fieldWeight in 3205, product of:
              2.0 = tf(freq=4.0), with freq of:
                4.0 = termFreq=4.0
              2.2337668 = idf(docFreq=12875, maxDocs=44218)
              0.078125 = fieldNorm(doc=3205)
      0.0625 = coord(1/16)
    
    Source
    Wissen in elektronischen Netzwerken: Strukturierung, Erschließung und Retrieval von Informationsressourcen im Internet. Eine Auswahl von Vorträgen der 19. Jahrestagung der Gesellschaft für Klassifikation, Basel 1995. Hrsg.: H.-C. Hobohm u. H.-J. Wätjen
  11. Koch, T.; Ardö, A.; Falcoz, F.; Nielsen, M.; Dandfær, M.: Improving resource discovery and retrieval on the Internet : the Nordic WAIS/World Wide Web Project and the classification of WAIS databases (1995) 0.00
    0.0014567381 = product of:
      0.02330781 = sum of:
        0.02330781 = weight(_text_:der in 3370) [ClassicSimilarity], result of:
          0.02330781 = score(doc=3370,freq=4.0), product of:
            0.06677957 = queryWeight, product of:
              2.2337668 = idf(docFreq=12875, maxDocs=44218)
              0.029895496 = queryNorm
            0.34902605 = fieldWeight in 3370, product of:
              2.0 = tf(freq=4.0), with freq of:
                4.0 = termFreq=4.0
              2.2337668 = idf(docFreq=12875, maxDocs=44218)
              0.078125 = fieldNorm(doc=3370)
      0.0625 = coord(1/16)
    
    Source
    Wissen in elektronischen Netzwerken: Strukturierung, Erschließung und Retrieval von Informationsressourcen im Internet. Eine Auswahl von Vorträgen der 19. Jahrestagung der Gesellschaft für Klassifikation, Basel 1995. Hrsg.: H.-C. Hobohm u. H.-J. Wätjen
  12. Koch, T.: Browsing and searching Internet resources (1996) 0.00
    0.0014420971 = product of:
      0.023073554 = sum of:
        0.023073554 = weight(_text_:der in 3231) [ClassicSimilarity], result of:
          0.023073554 = score(doc=3231,freq=2.0), product of:
            0.06677957 = queryWeight, product of:
              2.2337668 = idf(docFreq=12875, maxDocs=44218)
              0.029895496 = queryNorm
            0.34551817 = fieldWeight in 3231, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              2.2337668 = idf(docFreq=12875, maxDocs=44218)
              0.109375 = fieldNorm(doc=3231)
      0.0625 = coord(1/16)
    
    Abstract
    Darstellung zu den verschiedenen Möglichkeiten der inhaltlichen Suche im Internet
  13. Ardö, A.; Koch, T.: Automatic classification applied to full-text Internet documents in a robot-generated subject index (1999) 0.00
    0.00132228 = product of:
      0.02115648 = sum of:
        0.02115648 = weight(_text_:information in 382) [ClassicSimilarity], result of:
          0.02115648 = score(doc=382,freq=6.0), product of:
            0.052480884 = queryWeight, product of:
              1.7554779 = idf(docFreq=20772, maxDocs=44218)
              0.029895496 = queryNorm
            0.40312737 = fieldWeight in 382, product of:
              2.4494898 = tf(freq=6.0), with freq of:
                6.0 = termFreq=6.0
              1.7554779 = idf(docFreq=20772, maxDocs=44218)
              0.09375 = fieldNorm(doc=382)
      0.0625 = coord(1/16)
    
    Imprint
    Hinskey Hill : Learned Information
    Source
    Online information 99: 23rd International Online Information Meeting, Proceedings, London, 7-9 December 1999. Ed.: D. Raitt et al
  14. Koch, T.: Information mapping : a glimpse at the future (1993) 0.00
    0.0012723645 = product of:
      0.020357832 = sum of:
        0.020357832 = weight(_text_:information in 4351) [ClassicSimilarity], result of:
          0.020357832 = score(doc=4351,freq=8.0), product of:
            0.052480884 = queryWeight, product of:
              1.7554779 = idf(docFreq=20772, maxDocs=44218)
              0.029895496 = queryNorm
            0.38790947 = fieldWeight in 4351, product of:
              2.828427 = tf(freq=8.0), with freq of:
                8.0 = termFreq=8.0
              1.7554779 = idf(docFreq=20772, maxDocs=44218)
              0.078125 = fieldNorm(doc=4351)
      0.0625 = coord(1/16)
    
    Abstract
    Suggests information mapping as a technique that may be applied to online information retrieval to yield information rather than just data. The technique is illustrated using the example of subject areas in the field of health care
  15. Koch, T.; Vizine-Goetz, D.: DDC and knowledge organization in the digital library : Research and development. Demonstration pages (1999) 0.00
    8.740429E-4 = product of:
      0.013984687 = sum of:
        0.013984687 = weight(_text_:der in 942) [ClassicSimilarity], result of:
          0.013984687 = score(doc=942,freq=4.0), product of:
            0.06677957 = queryWeight, product of:
              2.2337668 = idf(docFreq=12875, maxDocs=44218)
              0.029895496 = queryNorm
            0.20941564 = fieldWeight in 942, product of:
              2.0 = tf(freq=4.0), with freq of:
                4.0 = termFreq=4.0
              2.2337668 = idf(docFreq=12875, maxDocs=44218)
              0.046875 = fieldNorm(doc=942)
      0.0625 = coord(1/16)
    
    Abstract
    Der Workshop gibt einen Einblick in die aktuelle Forschung und Entwicklung zur Wissensorganisation in digitalen Bibliotheken. Diane Vizine-Goetz vom OCLC Office of Research in Dublin, Ohio, stellt die Forschungsprojekte von OCLC zur Anpassung und Weiterentwicklung der Dewey Decimal Classification als Wissensorganisationsinstrument fuer grosse digitale Dokumentensammlungen vor. Traugott Koch, NetLab, Universität Lund in Schweden, demonstriert die Ansätze und Lösungen des EU-Projekts DESIRE zum Einsatz von intellektueller und vor allem automatischer Klassifikation in Fachinformationsdiensten im Internet.
  16. Koch, T.; Seiffert, F.; Wätjen, H.-J.: Informationen im Web anbieten und wiederfinden (1998) 0.00
    7.2104856E-4 = product of:
      0.011536777 = sum of:
        0.011536777 = weight(_text_:der in 1840) [ClassicSimilarity], result of:
          0.011536777 = score(doc=1840,freq=2.0), product of:
            0.06677957 = queryWeight, product of:
              2.2337668 = idf(docFreq=12875, maxDocs=44218)
              0.029895496 = queryNorm
            0.17275909 = fieldWeight in 1840, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              2.2337668 = idf(docFreq=12875, maxDocs=44218)
              0.0546875 = fieldNorm(doc=1840)
      0.0625 = coord(1/16)
    
    Content
    Enthält die einzelnen Beiträge: KOCH, T.: Übersicht über die verschiedenen Typen von Suchdiensten; SEIFFERT, F.: Hilfsmittel zur Wahl passender Suchdienste für bestimmte Zwecke; KOCH, T.: Konzeptsuche / Erweiterung der Suchanfrage; KOCH, T.: Kontrolliertes Vokabular; SEIFFERT, F.: Ranking; WÄTJEN, H.-J.: Integration von Searching und Browsing; KOCH, T.: Metadaten und Suchdienste
  17. Day, M.; Koch, T.: ¬The role of classification schemes in Internet resource description and discovery : DESIRE - Development of a European Service for Information on Research and Education. Specification for resource description methods, part 3 (1997) 0.00
    6.3618226E-4 = product of:
      0.010178916 = sum of:
        0.010178916 = weight(_text_:information in 3067) [ClassicSimilarity], result of:
          0.010178916 = score(doc=3067,freq=2.0), product of:
            0.052480884 = queryWeight, product of:
              1.7554779 = idf(docFreq=20772, maxDocs=44218)
              0.029895496 = queryNorm
            0.19395474 = fieldWeight in 3067, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              1.7554779 = idf(docFreq=20772, maxDocs=44218)
              0.078125 = fieldNorm(doc=3067)
      0.0625 = coord(1/16)
    
  18. Koch, T.: Experiments with automatic classification of WAIS databases and indexing of WWW : some results from the Nordic WAIS/WWW project (1994) 0.00
    6.297883E-4 = product of:
      0.010076613 = sum of:
        0.010076613 = weight(_text_:information in 7209) [ClassicSimilarity], result of:
          0.010076613 = score(doc=7209,freq=4.0), product of:
            0.052480884 = queryWeight, product of:
              1.7554779 = idf(docFreq=20772, maxDocs=44218)
              0.029895496 = queryNorm
            0.1920054 = fieldWeight in 7209, product of:
              2.0 = tf(freq=4.0), with freq of:
                4.0 = termFreq=4.0
              1.7554779 = idf(docFreq=20772, maxDocs=44218)
              0.0546875 = fieldNorm(doc=7209)
      0.0625 = coord(1/16)
    
    Abstract
    The Nordic WAIS/WWW project sponsored by NORDINFO is a joint project between Lund University Library and the National Technological Library of Denmark. It aims to improve the existing networked information discovery and retrieval tools Wide Area Information System (WAIS) and World Wide Web (WWW), and to move towards unifying WWW and WAIS. Details current results focusing on the WAIS side of the project. Describes research into automatic indexing and classification of WAIS sources, development of an orientation tool for WAIS, and development of a WAIS index of WWW resources
  19. Koch, T.; Ardö, A.; Brümmer, A.: ¬The building and maintenance of robot based internet search services : A review of current indexing and data collection methods. Prepared to meet the requirements of Work Package 3 of EU Telematics for Research, project DESIRE. Version D3.11v0.3 (Draft version 3) (1996) 0.00
    4.4076002E-4 = product of:
      0.0070521603 = sum of:
        0.0070521603 = weight(_text_:information in 1669) [ClassicSimilarity], result of:
          0.0070521603 = score(doc=1669,freq=6.0), product of:
            0.052480884 = queryWeight, product of:
              1.7554779 = idf(docFreq=20772, maxDocs=44218)
              0.029895496 = queryNorm
            0.1343758 = fieldWeight in 1669, product of:
              2.4494898 = tf(freq=6.0), with freq of:
                6.0 = termFreq=6.0
              1.7554779 = idf(docFreq=20772, maxDocs=44218)
              0.03125 = fieldNorm(doc=1669)
      0.0625 = coord(1/16)
    
    Abstract
    After a short outline of problems, possibilities and difficulties of systematic information retrieval on the Internet and a description of efforts for development in this area, a specification of the terminology for this report is required. Although the process of retrieval is generally seen as an iterative process of browsing and information retrieval and several important services on the net have taken this fact into consideration, the emphasis of this report lays on the general retrieval tools for the whole of Internet. In order to be able to evaluate the differences, possibilities and restrictions of the different services it is necessary to begin with organizing the existing varieties in a typological/ taxonomical survey. The possibilities and weaknesses will be briefly compared and described for the most important services in the categories robot-based WWW-catalogues of different types, list- or form-based catalogues and simultaneous or collected search services respectively. It will however for different reasons not be possible to rank them in order of "best" services. Still more important are the weaknesses and problems common for all attempts of indexing the Internet. The problems of the quality of the input, the technical performance and the general problem of indexing virtual hypertext are shown to be at least as difficult as the different aspects of harvesting, indexing and information retrieval. Some of the attempts made in the area of further development of retrieval services will be mentioned in relation to descriptions of the contents of documents and standardization efforts. Internet harvesting and indexing technology and retrieval software is thoroughly reviewed. Details about all services and software are listed in analytical forms in Annex 1-3.