Document (#32154)

Author

Kwiatkowski, M.
Höhfeld, S.

Title

Thematisches Aufspüren von Web-Dokumenten : eine kritische Betrachtung von Focused Crawling-Strategien

Source

Information - Wissenschaft und Praxis. 58(2007) H.2, S.69-82

Year

2007

Abstract

Herkömmliche Suchmaschinen dienen der breiten Websuche und zeichnen sich zumeist durch eine hohe Quantität - nicht unbedingt durch Qualität - ihrer Ergebnismengen aus. Zum Suchen von Dokumenten wird ein allgemeiner Crawler eingesetzt, der Webseiten aufspürt, um große Datenspeicher aufzubauen. Focused Crawler gehen dagegen gezielter vor: Nicht enorme Datenmengen sollen durchsucht, gespeichert und indexiert werden, sondern nur bestimmte, thematisch relevante Segmente des World Wide Web. Der Focused Crawler muss einen möglichst optimalen Weg durch das Web finden, um Knowledge Discovery zu betreiben. Dabei bleiben die für eine Thematik irrelevanten Bereiche des Web unberücksichtigt. Die Aufgabe wird dadurch erheblich verkleinert und der Ressourcenaufwand verringert. Ziel ist die Produktion qualifizierter Suchergebnisse zu einem bestimmten Wissensgebiet. Im Allgemeinen können Focused Crawling-Techniken für den Aufbau spezialisierter vertikaler Suchmaschinen eingesetzt werden. Sie sind darüber hinaus im Bereich der Digitalen Bibliotheken von Vorteil. Da diese oft über einen thematischen Schwerpunkt verfügen und der qualifizierten Literatur-Untersuchung dienen, müssen sie einen gewissen Qualitätsanspruch Genüge leisten und dabei lediglich Anfragen zu einem definierten Wissensbereich bedienen. Der Einsatz von Focused Crawling bietet sich also an, um eine hohe Dokument-Qualität in einer spezifischen Domäne zu gewährleisten. Dieser Review-Artikel beleuchtet grundlegende Ansätze des Focused Crawling und verfolgt diese bis in die aktuellen Entwicklungen. Praktische Einsatzgebiete und aktuelle Systeme untermauern die Bedeutsamkeit des Forschungsgebiets. Darüber hinaus wird eine kritische Betrachtung der aufgeführten Ansätze geleistet.

Theme

Suchmaschinen

Similar documents (content)

1. Frohner, H.: Social Tagging : Grundlagen, Anwendungen, Auswirkungen auf Wissensorganisation und soziale Strukturen der User (2010) 0.21

   0.209578 = sum of:
     0.209578 = product of:
       0.523945 = sum of:
         0.022827683 = weight(abstract_txt:dabei in 723) [ClassicSimilarity], result of:
           0.022827683 = score(doc=723,freq=1.0), product of:
             0.077947505 = queryWeight, product of:
               4.6857553 = idf(docFreq=1113, maxDocs=44421)
               0.016634993 = queryNorm
             0.2928597 = fieldWeight in 723, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               4.6857553 = idf(docFreq=1113, maxDocs=44421)
               0.0625 = fieldNorm(doc=723)
         0.10300286 = weight(abstract_txt:bedeutsamkeit in 723) [ClassicSimilarity], result of:
           0.10300286 = score(doc=723,freq=1.0), product of:
             0.16893405 = queryWeight, product of:
               1.0409802 = boost
               9.755557 = idf(docFreq=6, maxDocs=44421)
               0.016634993 = queryNorm
             0.6097223 = fieldWeight in 723, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               9.755557 = idf(docFreq=6, maxDocs=44421)
               0.0625 = fieldNorm(doc=723)
         0.025274731 = weight(abstract_txt:wird in 723) [ClassicSimilarity], result of:
           0.025274731 = score(doc=723,freq=2.0), product of:
             0.07579475 = queryWeight, product of:
               1.207714 = boost
               3.7727013 = idf(docFreq=2775, maxDocs=44421)
               0.016634993 = queryNorm
             0.33346283 = fieldWeight in 723, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               3.7727013 = idf(docFreq=2775, maxDocs=44421)
               0.0625 = fieldNorm(doc=723)
         0.046563447 = weight(abstract_txt:darüber in 723) [ClassicSimilarity], result of:
           0.046563447 = score(doc=723,freq=1.0), product of:
             0.12536927 = queryWeight, product of:
               1.2682195 = boost
               5.942566 = idf(docFreq=316, maxDocs=44421)
               0.016634993 = queryNorm
             0.37141037 = fieldWeight in 723, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               5.942566 = idf(docFreq=316, maxDocs=44421)
               0.0625 = fieldNorm(doc=723)
         0.051187985 = weight(abstract_txt:hinaus in 723) [ClassicSimilarity], result of:
           0.051187985 = score(doc=723,freq=1.0), product of:
             0.13353845 = queryWeight, product of:
               1.3088868 = boost
               6.133123 = idf(docFreq=261, maxDocs=44421)
               0.016634993 = queryNorm
             0.38332018 = fieldWeight in 723, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               6.133123 = idf(docFreq=261, maxDocs=44421)
               0.0625 = fieldNorm(doc=723)
         0.052678395 = weight(abstract_txt:qualität in 723) [ClassicSimilarity], result of:
           0.052678395 = score(doc=723,freq=1.0), product of:
             0.13611814 = queryWeight, product of:
               1.3214687 = boost
               6.192079 = idf(docFreq=246, maxDocs=44421)
               0.016634993 = queryNorm
             0.38700494 = fieldWeight in 723, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               6.192079 = idf(docFreq=246, maxDocs=44421)
               0.0625 = fieldNorm(doc=723)
         0.03603472 = weight(abstract_txt:durch in 723) [ClassicSimilarity], result of:
           0.03603472 = score(doc=723,freq=2.0), product of:
             0.09601274 = queryWeight, product of:
               1.3592801 = boost
               4.246169 = idf(docFreq=1728, maxDocs=44421)
               0.016634993 = queryNorm
             0.37531185 = fieldWeight in 723, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               4.246169 = idf(docFreq=1728, maxDocs=44421)
               0.0625 = fieldNorm(doc=723)
         0.05894481 = weight(abstract_txt:eingesetzt in 723) [ClassicSimilarity], result of:
           0.05894481 = score(doc=723,freq=1.0), product of:
             0.14670944 = queryWeight, product of:
               1.3719172 = boost
               6.428468 = idf(docFreq=194, maxDocs=44421)
               0.016634993 = queryNorm
             0.40177926 = fieldWeight in 723, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               6.428468 = idf(docFreq=194, maxDocs=44421)
               0.0625 = fieldNorm(doc=723)
         0.080315396 = weight(abstract_txt:hohe in 723) [ClassicSimilarity], result of:
           0.080315396 = score(doc=723,freq=1.0), product of:
             0.18031293 = queryWeight, product of:
               1.5209409 = boost
               7.1267567 = idf(docFreq=96, maxDocs=44421)
               0.016634993 = queryNorm
             0.4454223 = fieldWeight in 723, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               7.1267567 = idf(docFreq=96, maxDocs=44421)
               0.0625 = fieldNorm(doc=723)
         0.047114905 = weight(abstract_txt:eine in 723) [ClassicSimilarity], result of:
           0.047114905 = score(doc=723,freq=4.0), product of:
             0.10803386 = queryWeight, product of:
               1.8614391 = boost
               3.4888992 = idf(docFreq=3686, maxDocs=44421)
               0.016634993 = queryNorm
             0.4361124 = fieldWeight in 723, product of:
               2.0 = tf(freq=4.0), with freq of:
                 4.0 = termFreq=4.0
               3.4888992 = idf(docFreq=3686, maxDocs=44421)
               0.0625 = fieldNorm(doc=723)
       0.4 = coord(10/25)
   

2. Lehrke, C.: Architektur von Suchmaschinen : Googles Architektur, insb. Crawler und Indizierer (2005) 0.15

   0.14703302 = sum of:
     0.14703302 = product of:
       0.52511793 = sum of:
         0.022827683 = weight(abstract_txt:dabei in 992) [ClassicSimilarity], result of:
           0.022827683 = score(doc=992,freq=1.0), product of:
             0.077947505 = queryWeight, product of:
               4.6857553 = idf(docFreq=1113, maxDocs=44421)
               0.016634993 = queryNorm
             0.2928597 = fieldWeight in 992, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               4.6857553 = idf(docFreq=1113, maxDocs=44421)
               0.0625 = fieldNorm(doc=992)
         0.025274731 = weight(abstract_txt:wird in 992) [ClassicSimilarity], result of:
           0.025274731 = score(doc=992,freq=2.0), product of:
             0.07579475 = queryWeight, product of:
               1.207714 = boost
               3.7727013 = idf(docFreq=2775, maxDocs=44421)
               0.016634993 = queryNorm
             0.33346283 = fieldWeight in 992, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               3.7727013 = idf(docFreq=2775, maxDocs=44421)
               0.0625 = fieldNorm(doc=992)
         0.101242945 = weight(abstract_txt:suchmaschinen in 992) [ClassicSimilarity], result of:
           0.101242945 = score(doc=992,freq=5.0), product of:
             0.12304978 = queryWeight, product of:
               1.2564329 = boost
               5.887337 = idf(docFreq=334, maxDocs=44421)
               0.016634993 = queryNorm
             0.8227804 = fieldWeight in 992, product of:
               2.236068 = tf(freq=5.0), with freq of:
                 5.0 = termFreq=5.0
               5.887337 = idf(docFreq=334, maxDocs=44421)
               0.0625 = fieldNorm(doc=992)
         0.059372317 = weight(abstract_txt:dokumenten in 992) [ClassicSimilarity], result of:
           0.059372317 = score(doc=992,freq=1.0), product of:
             0.14741793 = queryWeight, product of:
               1.3752259 = boost
               6.443972 = idf(docFreq=191, maxDocs=44421)
               0.016634993 = queryNorm
             0.40274826 = fieldWeight in 992, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               6.443972 = idf(docFreq=191, maxDocs=44421)
               0.0625 = fieldNorm(doc=992)
         0.06348578 = weight(abstract_txt:dienen in 992) [ClassicSimilarity], result of:
           0.06348578 = score(doc=992,freq=1.0), product of:
             0.15415064 = queryWeight, product of:
               1.4062792 = boost
               6.58948 = idf(docFreq=165, maxDocs=44421)
               0.016634993 = queryNorm
             0.4118425 = fieldWeight in 992, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               6.58948 = idf(docFreq=165, maxDocs=44421)
               0.0625 = fieldNorm(doc=992)
         0.03331527 = weight(abstract_txt:eine in 992) [ClassicSimilarity], result of:
           0.03331527 = score(doc=992,freq=2.0), product of:
             0.10803386 = queryWeight, product of:
               1.8614391 = boost
               3.4888992 = idf(docFreq=3686, maxDocs=44421)
               0.016634993 = queryNorm
             0.30837804 = fieldWeight in 992, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               3.4888992 = idf(docFreq=3686, maxDocs=44421)
               0.0625 = fieldNorm(doc=992)
         0.21959917 = weight(abstract_txt:crawler in 992) [ClassicSimilarity], result of:
           0.21959917 = score(doc=992,freq=1.0), product of:
             0.4035945 = queryWeight, product of:
               2.7868726 = boost
               8.705735 = idf(docFreq=19, maxDocs=44421)
               0.016634993 = queryNorm
             0.54410845 = fieldWeight in 992, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               8.705735 = idf(docFreq=19, maxDocs=44421)
               0.0625 = fieldNorm(doc=992)
       0.28 = coord(7/25)
   

3. Stollberg, M.: Ontologiebasierte Wissensmodellierung : Verwendung als semantischer Grundbaustein des Semantic Web (2002) 0.15

   0.14559262 = sum of:
     0.14559262 = product of:
       0.36398152 = sum of:
         0.02471169 = weight(abstract_txt:dabei in 495) [ClassicSimilarity], result of:
           0.02471169 = score(doc=495,freq=3.0), product of:
             0.077947505 = queryWeight, product of:
               4.6857553 = idf(docFreq=1113, maxDocs=44421)
               0.016634993 = queryNorm
             0.31702992 = fieldWeight in 495, product of:
               1.7320508 = tf(freq=3.0), with freq of:
                 3.0 = termFreq=3.0
               4.6857553 = idf(docFreq=1113, maxDocs=44421)
               0.0390625 = fieldNorm(doc=495)
         0.033509877 = weight(abstract_txt:wird in 495) [ClassicSimilarity], result of:
           0.033509877 = score(doc=495,freq=9.0), product of:
             0.07579475 = queryWeight, product of:
               1.207714 = boost
               3.7727013 = idf(docFreq=2775, maxDocs=44421)
               0.016634993 = queryNorm
             0.44211343 = fieldWeight in 495, product of:
               3.0 = tf(freq=9.0), with freq of:
                 9.0 = termFreq=9.0
               3.7727013 = idf(docFreq=2775, maxDocs=44421)
               0.0390625 = fieldNorm(doc=495)
         0.0225217 = weight(abstract_txt:durch in 495) [ClassicSimilarity], result of:
           0.0225217 = score(doc=495,freq=2.0), product of:
             0.09601274 = queryWeight, product of:
               1.3592801 = boost
               4.246169 = idf(docFreq=1728, maxDocs=44421)
               0.016634993 = queryNorm
             0.2345699 = fieldWeight in 495, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               4.246169 = idf(docFreq=1728, maxDocs=44421)
               0.0390625 = fieldNorm(doc=495)
         0.051010966 = weight(abstract_txt:ansätze in 495) [ClassicSimilarity], result of:
           0.051010966 = score(doc=495,freq=2.0), product of:
             0.1446572 = queryWeight, product of:
               1.3622879 = boost
               6.3833475 = idf(docFreq=203, maxDocs=44421)
               0.016634993 = queryNorm
             0.35263345 = fieldWeight in 495, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               6.3833475 = idf(docFreq=203, maxDocs=44421)
               0.0390625 = fieldNorm(doc=495)
         0.016116323 = weight(abstract_txt:einen in 495) [ClassicSimilarity], result of:
           0.016116323 = score(doc=495,freq=1.0), product of:
             0.0967792 = queryWeight, product of:
               1.3646947 = boost
               4.263084 = idf(docFreq=1699, maxDocs=44421)
               0.016634993 = queryNorm
             0.16652672 = fieldWeight in 495, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               4.263084 = idf(docFreq=1699, maxDocs=44421)
               0.0390625 = fieldNorm(doc=495)
         0.03684051 = weight(abstract_txt:eingesetzt in 495) [ClassicSimilarity], result of:
           0.03684051 = score(doc=495,freq=1.0), product of:
             0.14670944 = queryWeight, product of:
               1.3719172 = boost
               6.428468 = idf(docFreq=194, maxDocs=44421)
               0.016634993 = queryNorm
             0.25111204 = fieldWeight in 495, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               6.428468 = idf(docFreq=194, maxDocs=44421)
               0.0390625 = fieldNorm(doc=495)
         0.039678615 = weight(abstract_txt:dienen in 495) [ClassicSimilarity], result of:
           0.039678615 = score(doc=495,freq=1.0), product of:
             0.15415064 = queryWeight, product of:
               1.4062792 = boost
               6.58948 = idf(docFreq=165, maxDocs=44421)
               0.016634993 = queryNorm
             0.25740156 = fieldWeight in 495, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               6.58948 = idf(docFreq=165, maxDocs=44421)
               0.0390625 = fieldNorm(doc=495)
         0.050638642 = weight(abstract_txt:betrachtung in 495) [ClassicSimilarity], result of:
           0.050638642 = score(doc=495,freq=1.0), product of:
             0.18136871 = queryWeight, product of:
               1.525387 = boost
               7.1475906 = idf(docFreq=94, maxDocs=44421)
               0.016634993 = queryNorm
             0.27920276 = fieldWeight in 495, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               7.1475906 = idf(docFreq=94, maxDocs=44421)
               0.0390625 = fieldNorm(doc=495)
         0.05950639 = weight(abstract_txt:kritische in 495) [ClassicSimilarity], result of:
           0.05950639 = score(doc=495,freq=1.0), product of:
             0.20196839 = queryWeight, product of:
               1.6096839 = boost
               7.5425844 = idf(docFreq=63, maxDocs=44421)
               0.016634993 = queryNorm
             0.2946322 = fieldWeight in 495, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               7.5425844 = idf(docFreq=63, maxDocs=44421)
               0.0390625 = fieldNorm(doc=495)
         0.029446816 = weight(abstract_txt:eine in 495) [ClassicSimilarity], result of:
           0.029446816 = score(doc=495,freq=4.0), product of:
             0.10803386 = queryWeight, product of:
               1.8614391 = boost
               3.4888992 = idf(docFreq=3686, maxDocs=44421)
               0.016634993 = queryNorm
             0.27257025 = fieldWeight in 495, product of:
               2.0 = tf(freq=4.0), with freq of:
                 4.0 = termFreq=4.0
               3.4888992 = idf(docFreq=3686, maxDocs=44421)
               0.0390625 = fieldNorm(doc=495)
       0.4 = coord(10/25)
   

4. Lewandowski, D.: Suchmaschinen (2023) 0.14

   0.14335833 = sum of:
     0.14335833 = product of:
       0.5973264 = sum of:
         0.028534604 = weight(abstract_txt:dabei in 1794) [ClassicSimilarity], result of:
           0.028534604 = score(doc=1794,freq=1.0), product of:
             0.077947505 = queryWeight, product of:
               4.6857553 = idf(docFreq=1113, maxDocs=44421)
               0.016634993 = queryNorm
             0.36607462 = fieldWeight in 1794, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               4.6857553 = idf(docFreq=1113, maxDocs=44421)
               0.078125 = fieldNorm(doc=1794)
         0.022339918 = weight(abstract_txt:wird in 1794) [ClassicSimilarity], result of:
           0.022339918 = score(doc=1794,freq=1.0), product of:
             0.07579475 = queryWeight, product of:
               1.207714 = boost
               3.7727013 = idf(docFreq=2775, maxDocs=44421)
               0.016634993 = queryNorm
             0.2947423 = fieldWeight in 1794, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               3.7727013 = idf(docFreq=2775, maxDocs=44421)
               0.078125 = fieldNorm(doc=1794)
         0.056596525 = weight(abstract_txt:suchmaschinen in 1794) [ClassicSimilarity], result of:
           0.056596525 = score(doc=1794,freq=1.0), product of:
             0.12304978 = queryWeight, product of:
               1.2564329 = boost
               5.887337 = idf(docFreq=334, maxDocs=44421)
               0.016634993 = queryNorm
             0.4599482 = fieldWeight in 1794, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               5.887337 = idf(docFreq=334, maxDocs=44421)
               0.078125 = fieldNorm(doc=1794)
         0.10495641 = weight(abstract_txt:dokumenten in 1794) [ClassicSimilarity], result of:
           0.10495641 = score(doc=1794,freq=2.0), product of:
             0.14741793 = queryWeight, product of:
               1.3752259 = boost
               6.443972 = idf(docFreq=191, maxDocs=44421)
               0.016634993 = queryNorm
             0.711965 = fieldWeight in 1794, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               6.443972 = idf(docFreq=191, maxDocs=44421)
               0.078125 = fieldNorm(doc=1794)
         0.051003378 = weight(abstract_txt:eine in 1794) [ClassicSimilarity], result of:
           0.051003378 = score(doc=1794,freq=3.0), product of:
             0.10803386 = queryWeight, product of:
               1.8614391 = boost
               3.4888992 = idf(docFreq=3686, maxDocs=44421)
               0.016634993 = queryNorm
             0.4721055 = fieldWeight in 1794, product of:
               1.7320508 = tf(freq=3.0), with freq of:
                 3.0 = termFreq=3.0
               3.4888992 = idf(docFreq=3686, maxDocs=44421)
               0.078125 = fieldNorm(doc=1794)
         0.33389553 = weight(abstract_txt:crawling in 1794) [ClassicSimilarity], result of:
           0.33389553 = score(doc=1794,freq=1.0), product of:
             0.5061797 = queryWeight, product of:
               3.6038463 = boost
               8.443371 = idf(docFreq=25, maxDocs=44421)
               0.016634993 = queryNorm
             0.65963835 = fieldWeight in 1794, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               8.443371 = idf(docFreq=25, maxDocs=44421)
               0.078125 = fieldNorm(doc=1794)
       0.24 = coord(6/25)
   

5. Lewandowski, D.: Bewertung von linktopologischen Verfahren als bestimmender Ranking-Faktor bei WWW Suchmaschinen (2006) 0.13

   0.12859894 = sum of:
     0.12859894 = product of:
       0.4018717 = sum of:
         0.028534604 = weight(abstract_txt:dabei in 892) [ClassicSimilarity], result of:
           0.028534604 = score(doc=892,freq=1.0), product of:
             0.077947505 = queryWeight, product of:
               4.6857553 = idf(docFreq=1113, maxDocs=44421)
               0.016634993 = queryNorm
             0.36607462 = fieldWeight in 892, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               4.6857553 = idf(docFreq=1113, maxDocs=44421)
               0.078125 = fieldNorm(doc=892)
         0.031593416 = weight(abstract_txt:wird in 892) [ClassicSimilarity], result of:
           0.031593416 = score(doc=892,freq=2.0), product of:
             0.07579475 = queryWeight, product of:
               1.207714 = boost
               3.7727013 = idf(docFreq=2775, maxDocs=44421)
               0.016634993 = queryNorm
             0.41682854 = fieldWeight in 892, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               3.7727013 = idf(docFreq=2775, maxDocs=44421)
               0.078125 = fieldNorm(doc=892)
         0.098028064 = weight(abstract_txt:suchmaschinen in 892) [ClassicSimilarity], result of:
           0.098028064 = score(doc=892,freq=3.0), product of:
             0.12304978 = queryWeight, product of:
               1.2564329 = boost
               5.887337 = idf(docFreq=334, maxDocs=44421)
               0.016634993 = queryNorm
             0.7966537 = fieldWeight in 892, product of:
               1.7320508 = tf(freq=3.0), with freq of:
                 3.0 = termFreq=3.0
               5.887337 = idf(docFreq=334, maxDocs=44421)
               0.078125 = fieldNorm(doc=892)
         0.06584799 = weight(abstract_txt:qualität in 892) [ClassicSimilarity], result of:
           0.06584799 = score(doc=892,freq=1.0), product of:
             0.13611814 = queryWeight, product of:
               1.3214687 = boost
               6.192079 = idf(docFreq=246, maxDocs=44421)
               0.016634993 = queryNorm
             0.48375618 = fieldWeight in 892, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               6.192079 = idf(docFreq=246, maxDocs=44421)
               0.078125 = fieldNorm(doc=892)
         0.0318505 = weight(abstract_txt:durch in 892) [ClassicSimilarity], result of:
           0.0318505 = score(doc=892,freq=1.0), product of:
             0.09601274 = queryWeight, product of:
               1.3592801 = boost
               4.246169 = idf(docFreq=1728, maxDocs=44421)
               0.016634993 = queryNorm
             0.33173198 = fieldWeight in 892, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               4.246169 = idf(docFreq=1728, maxDocs=44421)
               0.078125 = fieldNorm(doc=892)
         0.0721404 = weight(abstract_txt:ansätze in 892) [ClassicSimilarity], result of:
           0.0721404 = score(doc=892,freq=1.0), product of:
             0.1446572 = queryWeight, product of:
               1.3622879 = boost
               6.3833475 = idf(docFreq=203, maxDocs=44421)
               0.016634993 = queryNorm
             0.498699 = fieldWeight in 892, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               6.3833475 = idf(docFreq=203, maxDocs=44421)
               0.078125 = fieldNorm(doc=892)
         0.032232646 = weight(abstract_txt:einen in 892) [ClassicSimilarity], result of:
           0.032232646 = score(doc=892,freq=1.0), product of:
             0.0967792 = queryWeight, product of:
               1.3646947 = boost
               4.263084 = idf(docFreq=1699, maxDocs=44421)
               0.016634993 = queryNorm
             0.33305344 = fieldWeight in 892, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               4.263084 = idf(docFreq=1699, maxDocs=44421)
               0.078125 = fieldNorm(doc=892)
         0.041644085 = weight(abstract_txt:eine in 892) [ClassicSimilarity], result of:
           0.041644085 = score(doc=892,freq=2.0), product of:
             0.10803386 = queryWeight, product of:
               1.8614391 = boost
               3.4888992 = idf(docFreq=3686, maxDocs=44421)
               0.016634993 = queryNorm
             0.38547254 = fieldWeight in 892, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               3.4888992 = idf(docFreq=3686, maxDocs=44421)
               0.078125 = fieldNorm(doc=892)
       0.32 = coord(8/25)