Document (#27189)

Author
Oberhauser, O.
Labner, J.
Title
Relevance Ranking in Online-Katalogen : Informationsstand und Perspektiven
Source
Mitteilungen der Vereinigung Österreichischer Bibliothekarinnen und Bibliothekare. 56(2003) H.3/4, S.49-63
Year
2003
Abstract
Bekanntlich führen Suchmaschinen wie Google &Co. beider Auflistung der Suchergebnisse ein "Ranking" nach "Relevanz" durch, d.h. die Dokumente werden in absteigender Reihenfolge entsprechend ihrer Erfüllung von Relevanzkriterien ausgeben. In Online-Katalogen (OPACs) ist derlei noch nicht allgemein übliche Praxis, doch bietet etwa das im Österreichischen Bibliothekenverbund eingesetzte System Aleph 500 tatsächlich eine solche Ranking-Option an (die im Verbundkatalog auch implementiert ist). Bislang liegen allerdings kaum Informationen zur Funktionsweise dieses Features, insbesondere auch im Hinblick auf eine Hilfestellung für Benutzer, vor. Daher möchten wir mit diesem Beitrag versuchen, den in unserem Verbund bestehenden Informationsstand zum Thema "Relevance Ranking" zu erweitern. Sowohl die Verwendung einer Ranking-Option in OPACs generell als auch die sich unter Aleph 500 konkret bietenden Möglichkeiten sollen im folgenden näher betrachtet werden.
Theme
OPAC
Retrievalalgorithmen
Object
Aleph 500
GBV

Similar documents (author)

  1. Oberhauser, O.; Labner, J.: Einführung der automatischen Indexierung im Österreichischen Verbundkatalog? : Bericht über eine empirische Studie (2003) 5.92
    5.9184237 = sum of:
      5.9184237 = sum of:
        2.372587 = weight(author_txt:oberhauser in 2878) [ClassicSimilarity], result of:
          2.372587 = score(doc=2878,freq=1.0), product of:
            0.60760415 = queryWeight, product of:
              7.809647 = idf(docFreq=48, maxDocs=44421)
              0.07780174 = queryNorm
            3.9048235 = fieldWeight in 2878, product of:
              1.0 = tf(freq=1.0), with freq of:
                1.0 = termFreq=1.0
              7.809647 = idf(docFreq=48, maxDocs=44421)
              0.5 = fieldNorm(doc=2878)
        3.5458367 = weight(author_txt:labner in 2878) [ClassicSimilarity], result of:
          3.5458367 = score(doc=2878,freq=1.0), product of:
            0.79424006 = queryWeight, product of:
              1.143314 = boost
              8.928879 = idf(docFreq=15, maxDocs=44421)
              0.07780174 = queryNorm
            4.4644394 = fieldWeight in 2878, product of:
              1.0 = tf(freq=1.0), with freq of:
                1.0 = termFreq=1.0
              8.928879 = idf(docFreq=15, maxDocs=44421)
              0.5 = fieldNorm(doc=2878)
    
  2. Oberhauser, O.; Labner, J.: Aufbau und Implementierung einer Datenbank für Informationseinrichtungen : ein gesamtösterreichisches Nachweisinstrument unter Aleph 500 (2004) 5.92
    5.9184237 = sum of:
      5.9184237 = sum of:
        2.372587 = weight(author_txt:oberhauser in 887) [ClassicSimilarity], result of:
          2.372587 = score(doc=887,freq=1.0), product of:
            0.60760415 = queryWeight, product of:
              7.809647 = idf(docFreq=48, maxDocs=44421)
              0.07780174 = queryNorm
            3.9048235 = fieldWeight in 887, product of:
              1.0 = tf(freq=1.0), with freq of:
                1.0 = termFreq=1.0
              7.809647 = idf(docFreq=48, maxDocs=44421)
              0.5 = fieldNorm(doc=887)
        3.5458367 = weight(author_txt:labner in 887) [ClassicSimilarity], result of:
          3.5458367 = score(doc=887,freq=1.0), product of:
            0.79424006 = queryWeight, product of:
              1.143314 = boost
              8.928879 = idf(docFreq=15, maxDocs=44421)
              0.07780174 = queryNorm
            4.4644394 = fieldWeight in 887, product of:
              1.0 = tf(freq=1.0), with freq of:
                1.0 = termFreq=1.0
              8.928879 = idf(docFreq=15, maxDocs=44421)
              0.5 = fieldNorm(doc=887)
    
  3. Oberhauser, O.; Labner, J.: Mit Symbolen angereichert : OPAC-Kurzanzeige im Verbundkatalog und in Lokalsystemen (2007) 5.92
    5.9184237 = sum of:
      5.9184237 = sum of:
        2.372587 = weight(author_txt:oberhauser in 1196) [ClassicSimilarity], result of:
          2.372587 = score(doc=1196,freq=1.0), product of:
            0.60760415 = queryWeight, product of:
              7.809647 = idf(docFreq=48, maxDocs=44421)
              0.07780174 = queryNorm
            3.9048235 = fieldWeight in 1196, product of:
              1.0 = tf(freq=1.0), with freq of:
                1.0 = termFreq=1.0
              7.809647 = idf(docFreq=48, maxDocs=44421)
              0.5 = fieldNorm(doc=1196)
        3.5458367 = weight(author_txt:labner in 1196) [ClassicSimilarity], result of:
          3.5458367 = score(doc=1196,freq=1.0), product of:
            0.79424006 = queryWeight, product of:
              1.143314 = boost
              8.928879 = idf(docFreq=15, maxDocs=44421)
              0.07780174 = queryNorm
            4.4644394 = fieldWeight in 1196, product of:
              1.0 = tf(freq=1.0), with freq of:
                1.0 = termFreq=1.0
              8.928879 = idf(docFreq=15, maxDocs=44421)
              0.5 = fieldNorm(doc=1196)
    
  4. Oberhauser, O.; Labner, J.: Praktische Lösungen für lokale Systematiken (1) : Die neue lokale Multi-Klassifikations-Normdatei der Verbundzentrale (2007) 5.92
    5.9184237 = sum of:
      5.9184237 = sum of:
        2.372587 = weight(author_txt:oberhauser in 1496) [ClassicSimilarity], result of:
          2.372587 = score(doc=1496,freq=1.0), product of:
            0.60760415 = queryWeight, product of:
              7.809647 = idf(docFreq=48, maxDocs=44421)
              0.07780174 = queryNorm
            3.9048235 = fieldWeight in 1496, product of:
              1.0 = tf(freq=1.0), with freq of:
                1.0 = termFreq=1.0
              7.809647 = idf(docFreq=48, maxDocs=44421)
              0.5 = fieldNorm(doc=1496)
        3.5458367 = weight(author_txt:labner in 1496) [ClassicSimilarity], result of:
          3.5458367 = score(doc=1496,freq=1.0), product of:
            0.79424006 = queryWeight, product of:
              1.143314 = boost
              8.928879 = idf(docFreq=15, maxDocs=44421)
              0.07780174 = queryNorm
            4.4644394 = fieldWeight in 1496, product of:
              1.0 = tf(freq=1.0), with freq of:
                1.0 = termFreq=1.0
              8.928879 = idf(docFreq=15, maxDocs=44421)
              0.5 = fieldNorm(doc=1496)
    
  5. Oberhauser, O.; Labner, J.: OPAC-Erweiterung durch automatische Indexierung : Empirische Untersuchung mit Daten aus dem Österreichischen Verbundkatalog (2002) 5.92
    5.9184237 = sum of:
      5.9184237 = sum of:
        2.372587 = weight(author_txt:oberhauser in 1883) [ClassicSimilarity], result of:
          2.372587 = score(doc=1883,freq=1.0), product of:
            0.60760415 = queryWeight, product of:
              7.809647 = idf(docFreq=48, maxDocs=44421)
              0.07780174 = queryNorm
            3.9048235 = fieldWeight in 1883, product of:
              1.0 = tf(freq=1.0), with freq of:
                1.0 = termFreq=1.0
              7.809647 = idf(docFreq=48, maxDocs=44421)
              0.5 = fieldNorm(doc=1883)
        3.5458367 = weight(author_txt:labner in 1883) [ClassicSimilarity], result of:
          3.5458367 = score(doc=1883,freq=1.0), product of:
            0.79424006 = queryWeight, product of:
              1.143314 = boost
              8.928879 = idf(docFreq=15, maxDocs=44421)
              0.07780174 = queryNorm
            4.4644394 = fieldWeight in 1883, product of:
              1.0 = tf(freq=1.0), with freq of:
                1.0 = termFreq=1.0
              8.928879 = idf(docFreq=15, maxDocs=44421)
              0.5 = fieldNorm(doc=1883)
    

Similar documents (content)

  1. Oberhauser, O.; Labner, J.: Mit Symbolen angereichert : OPAC-Kurzanzeige im Verbundkatalog und in Lokalsystemen (2007) 0.24
    0.23913011 = sum of:
      0.23913011 = product of:
        0.7472816 = sum of:
          0.060318828 = weight(abstract_txt:funktionsweise in 1196) [ClassicSimilarity], result of:
            0.060318828 = score(doc=1196,freq=1.0), product of:
              0.14434882 = queryWeight, product of:
                1.0066439 = boost
                7.6410246 = idf(docFreq=57, maxDocs=44421)
                0.018766608 = queryNorm
              0.41786852 = fieldWeight in 1196, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                7.6410246 = idf(docFreq=57, maxDocs=44421)
                0.0546875 = fieldNorm(doc=1196)
          0.080298804 = weight(abstract_txt:verbundkatalog in 1196) [ClassicSimilarity], result of:
            0.080298804 = score(doc=1196,freq=1.0), product of:
              0.17468302 = queryWeight, product of:
                1.1073747 = boost
                8.405631 = idf(docFreq=26, maxDocs=44421)
                0.018766608 = queryNorm
              0.45968294 = fieldWeight in 1196, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                8.405631 = idf(docFreq=26, maxDocs=44421)
                0.0546875 = fieldNorm(doc=1196)
          0.09430019 = weight(abstract_txt:bekanntlich in 1196) [ClassicSimilarity], result of:
            0.09430019 = score(doc=1196,freq=1.0), product of:
              0.19444032 = queryWeight, product of:
                1.1683216 = boost
                8.868255 = idf(docFreq=16, maxDocs=44421)
                0.018766608 = queryNorm
              0.48498267 = fieldWeight in 1196, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                8.868255 = idf(docFreq=16, maxDocs=44421)
                0.0546875 = fieldNorm(doc=1196)
          0.04250165 = weight(abstract_txt:auch in 1196) [ClassicSimilarity], result of:
            0.04250165 = score(doc=1196,freq=4.0), product of:
              0.10384899 = queryWeight, product of:
                1.4788734 = boost
                3.7418423 = idf(docFreq=2862, maxDocs=44421)
                0.018766608 = queryNorm
              0.409264 = fieldWeight in 1196, product of:
                2.0 = tf(freq=4.0), with freq of:
                  4.0 = termFreq=4.0
                3.7418423 = idf(docFreq=2862, maxDocs=44421)
                0.0546875 = fieldNorm(doc=1196)
          0.055348944 = weight(abstract_txt:opacs in 1196) [ClassicSimilarity], result of:
            0.055348944 = score(doc=1196,freq=1.0), product of:
              0.17173581 = queryWeight, product of:
                1.552797 = boost
                5.8933253 = idf(docFreq=332, maxDocs=44421)
                0.018766608 = queryNorm
              0.32229123 = fieldWeight in 1196, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                5.8933253 = idf(docFreq=332, maxDocs=44421)
                0.0546875 = fieldNorm(doc=1196)
          0.09663256 = weight(abstract_txt:option in 1196) [ClassicSimilarity], result of:
            0.09663256 = score(doc=1196,freq=1.0), product of:
              0.24900246 = queryWeight, product of:
                1.8697608 = boost
                7.0962973 = idf(docFreq=99, maxDocs=44421)
                0.018766608 = queryNorm
              0.38807875 = fieldWeight in 1196, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                7.0962973 = idf(docFreq=99, maxDocs=44421)
                0.0546875 = fieldNorm(doc=1196)
          0.106038064 = weight(abstract_txt:katalogen in 1196) [ClassicSimilarity], result of:
            0.106038064 = score(doc=1196,freq=1.0), product of:
              0.26490846 = queryWeight, product of:
                1.9285555 = boost
                7.319441 = idf(docFreq=79, maxDocs=44421)
                0.018766608 = queryNorm
              0.4002819 = fieldWeight in 1196, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                7.319441 = idf(docFreq=79, maxDocs=44421)
                0.0546875 = fieldNorm(doc=1196)
          0.21184258 = weight(abstract_txt:aleph in 1196) [ClassicSimilarity], result of:
            0.21184258 = score(doc=1196,freq=3.0), product of:
              0.2913554 = queryWeight, product of:
                2.0225337 = boost
                7.676116 = idf(docFreq=55, maxDocs=44421)
                0.018766608 = queryNorm
              0.7270934 = fieldWeight in 1196, product of:
                1.7320508 = tf(freq=3.0), with freq of:
                  3.0 = termFreq=3.0
                7.676116 = idf(docFreq=55, maxDocs=44421)
                0.0546875 = fieldNorm(doc=1196)
        0.32 = coord(8/25)
    
  2. Oberhauser, O.: Relevance Ranking in den Online-Katalogen der "nächsten Generation" (2010) 0.10
    0.099517755 = sum of:
      0.099517755 = product of:
        0.621986 = sum of:
          0.065442845 = weight(abstract_txt:relevance in 308) [ClassicSimilarity], result of:
            0.065442845 = score(doc=308,freq=2.0), product of:
              0.12015765 = queryWeight, product of:
                1.2988528 = boost
                4.929532 = idf(docFreq=872, maxDocs=44421)
                0.018766608 = queryNorm
              0.5446415 = fieldWeight in 308, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                4.929532 = idf(docFreq=872, maxDocs=44421)
                0.078125 = fieldNorm(doc=308)
          0.11182175 = weight(abstract_txt:opacs in 308) [ClassicSimilarity], result of:
            0.11182175 = score(doc=308,freq=2.0), product of:
              0.17173581 = queryWeight, product of:
                1.552797 = boost
                5.8933253 = idf(docFreq=332, maxDocs=44421)
                0.018766608 = queryNorm
              0.65112656 = fieldWeight in 308, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                5.8933253 = idf(docFreq=332, maxDocs=44421)
                0.078125 = fieldNorm(doc=308)
          0.15148297 = weight(abstract_txt:katalogen in 308) [ClassicSimilarity], result of:
            0.15148297 = score(doc=308,freq=1.0), product of:
              0.26490846 = queryWeight, product of:
                1.9285555 = boost
                7.319441 = idf(docFreq=79, maxDocs=44421)
                0.018766608 = queryNorm
              0.57183135 = fieldWeight in 308, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                7.319441 = idf(docFreq=79, maxDocs=44421)
                0.078125 = fieldNorm(doc=308)
          0.2932384 = weight(abstract_txt:ranking in 308) [ClassicSimilarity], result of:
            0.2932384 = score(doc=308,freq=3.0), product of:
              0.38720426 = queryWeight, product of:
                3.6865854 = boost
                5.5966744 = idf(docFreq=447, maxDocs=44421)
                0.018766608 = queryNorm
              0.75732225 = fieldWeight in 308, product of:
                1.7320508 = tf(freq=3.0), with freq of:
                  3.0 = termFreq=3.0
                5.5966744 = idf(docFreq=447, maxDocs=44421)
                0.078125 = fieldNorm(doc=308)
        0.16 = coord(4/25)
    
  3. Schulz, U.: Was wir über OPAC-Nutzer wissen : fehlertolerante Suchprozesse in OPACs (1994) 0.10
    0.09778654 = sum of:
      0.09778654 = product of:
        0.6111659 = sum of:
          0.15280858 = weight(abstract_txt:hilfestellung in 5) [ClassicSimilarity], result of:
            0.15280858 = score(doc=5,freq=1.0), product of:
              0.16898823 = queryWeight, product of:
                1.0891745 = boost
                8.267481 = idf(docFreq=30, maxDocs=44421)
                0.018766608 = queryNorm
              0.90425575 = fieldWeight in 5, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                8.267481 = idf(docFreq=30, maxDocs=44421)
                0.109375 = fieldNorm(doc=5)
          0.06478511 = weight(abstract_txt:relevance in 5) [ClassicSimilarity], result of:
            0.06478511 = score(doc=5,freq=1.0), product of:
              0.12015765 = queryWeight, product of:
                1.2988528 = boost
                4.929532 = idf(docFreq=872, maxDocs=44421)
                0.018766608 = queryNorm
              0.5391676 = fieldWeight in 5, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                4.929532 = idf(docFreq=872, maxDocs=44421)
                0.109375 = fieldNorm(doc=5)
          0.15655045 = weight(abstract_txt:opacs in 5) [ClassicSimilarity], result of:
            0.15655045 = score(doc=5,freq=2.0), product of:
              0.17173581 = queryWeight, product of:
                1.552797 = boost
                5.8933253 = idf(docFreq=332, maxDocs=44421)
                0.018766608 = queryNorm
              0.9115772 = fieldWeight in 5, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                5.8933253 = idf(docFreq=332, maxDocs=44421)
                0.109375 = fieldNorm(doc=5)
          0.23702176 = weight(abstract_txt:ranking in 5) [ClassicSimilarity], result of:
            0.23702176 = score(doc=5,freq=1.0), product of:
              0.38720426 = queryWeight, product of:
                3.6865854 = boost
                5.5966744 = idf(docFreq=447, maxDocs=44421)
                0.018766608 = queryNorm
              0.61213624 = fieldWeight in 5, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                5.5966744 = idf(docFreq=447, maxDocs=44421)
                0.109375 = fieldNorm(doc=5)
        0.16 = coord(4/25)
    
  4. Mikosch, M.: Relevance Ranking in Bibliothek-OPACs : ein aktueller Überblick (2008) 0.09
    0.09288851 = sum of:
      0.09288851 = product of:
        0.58055323 = sum of:
          0.08015078 = weight(abstract_txt:relevance in 999) [ClassicSimilarity], result of:
            0.08015078 = score(doc=999,freq=3.0), product of:
              0.12015765 = queryWeight, product of:
                1.2988528 = boost
                4.929532 = idf(docFreq=872, maxDocs=44421)
                0.018766608 = queryNorm
              0.66704684 = fieldWeight in 999, product of:
                1.7320508 = tf(freq=3.0), with freq of:
                  3.0 = termFreq=3.0
                4.929532 = idf(docFreq=872, maxDocs=44421)
                0.078125 = fieldNorm(doc=999)
          0.030358322 = weight(abstract_txt:auch in 999) [ClassicSimilarity], result of:
            0.030358322 = score(doc=999,freq=1.0), product of:
              0.10384899 = queryWeight, product of:
                1.4788734 = boost
                3.7418423 = idf(docFreq=2862, maxDocs=44421)
                0.018766608 = queryNorm
              0.29233143 = fieldWeight in 999, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                3.7418423 = idf(docFreq=2862, maxDocs=44421)
                0.078125 = fieldNorm(doc=999)
          0.17680572 = weight(abstract_txt:opacs in 999) [ClassicSimilarity], result of:
            0.17680572 = score(doc=999,freq=5.0), product of:
              0.17173581 = queryWeight, product of:
                1.552797 = boost
                5.8933253 = idf(docFreq=332, maxDocs=44421)
                0.018766608 = queryNorm
              1.0295216 = fieldWeight in 999, product of:
                2.236068 = tf(freq=5.0), with freq of:
                  5.0 = termFreq=5.0
                5.8933253 = idf(docFreq=332, maxDocs=44421)
                0.078125 = fieldNorm(doc=999)
          0.2932384 = weight(abstract_txt:ranking in 999) [ClassicSimilarity], result of:
            0.2932384 = score(doc=999,freq=3.0), product of:
              0.38720426 = queryWeight, product of:
                3.6865854 = boost
                5.5966744 = idf(docFreq=447, maxDocs=44421)
                0.018766608 = queryNorm
              0.75732225 = fieldWeight in 999, product of:
                1.7320508 = tf(freq=3.0), with freq of:
                  3.0 = termFreq=3.0
                5.5966744 = idf(docFreq=447, maxDocs=44421)
                0.078125 = fieldNorm(doc=999)
        0.16 = coord(4/25)
    
  5. Bauer, B.; Hinterhofer, C.; Lindpointner, R.; Neuböck, I.; Steiner, J.: Zukunftsperspektiven für den Österreichischen Bibliotheksverbund : Anforderungen an ein zukünftiges Bibliothekssystem aus der Perspektive der Österreichischen Nationalbibliothek, der Universitätsbibliotheken, der Landesbibliotheken, der Bibliotheken der Pädagogischen Hochschulen und der Verwaltungs- und Amtsbibliotheken (2011) 0.08
    0.083277784 = sum of:
      0.083277784 = product of:
        0.6939815 = sum of:
          0.2481059 = weight(abstract_txt:bibliothekenverbund in 528) [ClassicSimilarity], result of:
            0.2481059 = score(doc=528,freq=2.0), product of:
              0.18528461 = queryWeight, product of:
                1.1404833 = boost
                8.656945 = idf(docFreq=20, maxDocs=44421)
                0.018766608 = queryNorm
              1.3390529 = fieldWeight in 528, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                8.656945 = idf(docFreq=20, maxDocs=44421)
                0.109375 = fieldNorm(doc=528)
          0.20126085 = weight(abstract_txt:eingesetzte in 528) [ClassicSimilarity], result of:
            0.20126085 = score(doc=528,freq=1.0), product of:
              0.20304742 = queryWeight, product of:
                1.1939001 = boost
                9.06241 = idf(docFreq=13, maxDocs=44421)
                0.018766608 = queryNorm
              0.99120116 = fieldWeight in 528, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                9.06241 = idf(docFreq=13, maxDocs=44421)
                0.109375 = fieldNorm(doc=528)
          0.24461477 = weight(abstract_txt:aleph in 528) [ClassicSimilarity], result of:
            0.24461477 = score(doc=528,freq=1.0), product of:
              0.2913554 = queryWeight, product of:
                2.0225337 = boost
                7.676116 = idf(docFreq=55, maxDocs=44421)
                0.018766608 = queryNorm
              0.8395752 = fieldWeight in 528, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                7.676116 = idf(docFreq=55, maxDocs=44421)
                0.109375 = fieldNorm(doc=528)
        0.12 = coord(3/25)