Document (#34880)

Author
Kämmerer, C.
Title
Vom Image zum Volltext : Möglichkeiten und Grenzen des Einsatzes von OCR beim alten Buch
Source
Bibliotheksdienst. 43(2009) H.6, S.626-659
Year
2009
Series
Themen: Technik
Abstract
Ziel dieses Beitrags ist ein Überblick über aktuelle Entwicklungen bei der Volltextgenerierung im Bereich Altbestandsdigitalisierun Die Digitalisierung von Bibliotheksgut wurde des öfteren als "Medienrevolution" bezeichnet. Dabei liegt der Brückenschlag zum Alten Buch gar nicht einmal so fern: Die Erfindung des Buchdrucks und der damit verbundene Medienwechsel von den handgeschriebenen Codices zum Druck mit beweglichen Lettern (Gutenberg, um 1450) war wohl seinerzeit ebenso mit der Hoffnung auf bahnbrechenden Fortschritt sowie Wissenserschließung und -diffundierung verbunden wie die Transferierung von bisher nur auf Papier gedruckt vorliegenden Texten in die digitale Welt. Im Folgenden gilt es daher, vorzustellen, wie diese Wissenserschließung durch einen besonderen Bereich der Digitalisierung, nämlich der Volltextgenerierung durch Optical Character Recognition (OCR) erstrebt wird. Die Möglichkeiten und Grenzen des Einsatzes von OCR zum augenblicklichen Zeitpunkt (2009) und speziell beim Alten Buch werden daher im Zentrum der Betrachtungen stehen. Für die Zukunft wünschenswert wäre, dass diejenigen Textpassagen, die sich der Vorstellung der Grenzen des OCR-Einsatzes widmen, bald durch neue Erkenntnisse und Entwicklungen überholt sein werden. Die Notwendigkeit, die Arbeiten im Bereich Digitalisierung in Bibliotheken und Archiven voranzutreiben, ist offensichtlich: Digitalisierte Textausgaben können zeit- und ortsunabhängig für jeden Benutzer im Internet zugänglich gemacht werden. Für den Bereich des Alten Buchs bedeutet dies sowohl eine Transparentmachung der Katalogsituation als auch eine Zugänglichmachung des Primärmaterials durch sogenannte Images, d.h. die in einem Bildformat eingescannten Buchseiten. Die besondere Serviceleistung von Bibliotheken ist hierbei evident: Es kann auf so manch mühsame und kostspielige Forschungsreise durch die Ermöglichung der Arbeit mit Digitalisaten am heimischen Schreibtisch verzichtet werden. Aber nicht nur aus Benutzerperspektive sind die Vorteile von digitalisierten Sammlungen nicht von der Hand zu weisen. Die Bibliotheken selbst fördern durch die Bereitstellung von Digitalisaten eine breite öffentliche Wahrnehmung ihrer Institution im Internet und man hofft außerdem - ein weitaus wichtigerer Aspekt - auf eine schonendere Benutzung der Altbestände. Ob dieser konservatorische Gedanke in Zukunft jedoch tragen wird, wurde bisher noch nicht statistisch untersucht. Ein weiterer wichtiger Gesichtspunkt der Digitalisierung von Altbeständen ist aber auch die Bewahrung ohne Textverlust bei vom Verfall bedrohten Exemplaren. Katastrophenfälle wie der Einsturz des Stadtarchivs Köln und der Brand der Anna Amalia Bibliothek in Weimar haben die Vernichtung von unglaublichen Mengen von Kulturgütern mit sich gebracht. Hier ist die Digitalisierung (bzw. Mikroverfilmung) bisher das einzige Mittel, den Text für nachfolgende Generationen zu sichern. Doch was nutzt das schönste Digitalisat, wenn es nur mühselig oder gar nicht durchsuch-bar ist? Die Forderung der Benutzer zur Überführung digitaler Abbildungen eingescannter Buchseiten in einen maschinenlesbaren Text sowie die Bereitstellung entsprechender Browsingfunktionen ist den Bibliotheken und Archiven Anlass, die Arbeiten im Bereich Volltextgenerierung durch OCR voranzutreiben. Einige im folgenden exemplarisch vorgestellte Digitalisierungsprojekte zeugen von den damit verbundenen Bemühungen.
Form
Altes Buch
Object
OCR

Similar documents (content)

  1. Körnig, S.: Workshop zu Konzepten für die Digitale Bibliothek (2003) 0.23
    0.22697511 = sum of:
      0.22697511 = product of:
        0.56743777 = sum of:
          0.031535417 = weight(abstract_txt:möglichkeiten in 3012) [ClassicSimilarity], result of:
            0.031535417 = score(doc=3012,freq=1.0), product of:
              0.10388269 = queryWeight, product of:
                1.1267807 = boost
                5.55095 = idf(docFreq=442, maxDocs=41962)
                0.016608732 = queryNorm
              0.3035676 = fieldWeight in 3012, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                5.55095 = idf(docFreq=442, maxDocs=41962)
                0.0546875 = fieldNorm(doc=3012)
          0.04045286 = weight(abstract_txt:entwicklungen in 3012) [ClassicSimilarity], result of:
            0.04045286 = score(doc=3012,freq=1.0), product of:
              0.12264324 = queryWeight, product of:
                1.2243049 = boost
                6.0313916 = idf(docFreq=273, maxDocs=41962)
                0.016608732 = queryNorm
              0.32984173 = fieldWeight in 3012, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                6.0313916 = idf(docFreq=273, maxDocs=41962)
                0.0546875 = fieldNorm(doc=3012)
          0.01623507 = weight(abstract_txt:werden in 3012) [ClassicSimilarity], result of:
            0.01623507 = score(doc=3012,freq=1.0), product of:
              0.084073074 = queryWeight, product of:
                1.4335448 = boost
                3.5310931 = idf(docFreq=3338, maxDocs=41962)
                0.016608732 = queryNorm
              0.19310665 = fieldWeight in 3012, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                3.5310931 = idf(docFreq=3338, maxDocs=41962)
                0.0546875 = fieldNorm(doc=3012)
          0.01633477 = weight(abstract_txt:eine in 3012) [ClassicSimilarity], result of:
            0.01633477 = score(doc=3012,freq=1.0), product of:
              0.08441692 = queryWeight, product of:
                1.4364733 = boost
                3.5383067 = idf(docFreq=3314, maxDocs=41962)
                0.016608732 = queryNorm
              0.19350114 = fieldWeight in 3012, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                3.5383067 = idf(docFreq=3314, maxDocs=41962)
                0.0546875 = fieldNorm(doc=3012)
          0.0937934 = weight(abstract_txt:bereitstellung in 3012) [ClassicSimilarity], result of:
            0.0937934 = score(doc=3012,freq=2.0), product of:
              0.17052275 = queryWeight, product of:
                1.4436402 = boost
                7.1119204 = idf(docFreq=92, maxDocs=41962)
                0.016608732 = queryNorm
              0.5500345 = fieldWeight in 3012, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                7.1119204 = idf(docFreq=92, maxDocs=41962)
                0.0546875 = fieldNorm(doc=3012)
          0.05750145 = weight(abstract_txt:bisher in 3012) [ClassicSimilarity], result of:
            0.05750145 = score(doc=3012,freq=1.0), product of:
              0.1774845 = queryWeight, product of:
                1.8038219 = boost
                5.924208 = idf(docFreq=304, maxDocs=41962)
                0.016608732 = queryNorm
              0.32398012 = fieldWeight in 3012, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                5.924208 = idf(docFreq=304, maxDocs=41962)
                0.0546875 = fieldNorm(doc=3012)
          0.03923942 = weight(abstract_txt:bibliotheken in 3012) [ClassicSimilarity], result of:
            0.03923942 = score(doc=3012,freq=1.0), product of:
              0.1514151 = queryWeight, product of:
                1.9238331 = boost
                4.7387667 = idf(docFreq=997, maxDocs=41962)
                0.016608732 = queryNorm
              0.2591513 = fieldWeight in 3012, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                4.7387667 = idf(docFreq=997, maxDocs=41962)
                0.0546875 = fieldNorm(doc=3012)
          0.0507336 = weight(abstract_txt:nicht in 3012) [ClassicSimilarity], result of:
            0.0507336 = score(doc=3012,freq=3.0), product of:
              0.13421905 = queryWeight, product of:
                2.0250926 = boost
                3.9905505 = idf(docFreq=2108, maxDocs=41962)
                0.016608732 = queryNorm
              0.37799105 = fieldWeight in 3012, product of:
                1.7320508 = tf(freq=3.0), with freq of:
                  3.0 = termFreq=3.0
                3.9905505 = idf(docFreq=2108, maxDocs=41962)
                0.0546875 = fieldNorm(doc=3012)
          0.1713093 = weight(abstract_txt:bereich in 3012) [ClassicSimilarity], result of:
            0.1713093 = score(doc=3012,freq=5.0), product of:
              0.25479335 = queryWeight, product of:
                2.7901776 = boost
                5.4981904 = idf(docFreq=466, maxDocs=41962)
                0.016608732 = queryNorm
              0.67234606 = fieldWeight in 3012, product of:
                2.236068 = tf(freq=5.0), with freq of:
                  5.0 = termFreq=5.0
                5.4981904 = idf(docFreq=466, maxDocs=41962)
                0.0546875 = fieldNorm(doc=3012)
          0.050302457 = weight(abstract_txt:durch in 3012) [ClassicSimilarity], result of:
            0.050302457 = score(doc=3012,freq=1.0), product of:
              0.21532425 = queryWeight, product of:
                3.0349274 = boost
                4.2717733 = idf(docFreq=1591, maxDocs=41962)
                0.016608732 = queryNorm
              0.2336126 = fieldWeight in 3012, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                4.2717733 = idf(docFreq=1591, maxDocs=41962)
                0.0546875 = fieldNorm(doc=3012)
        0.4 = coord(10/25)
    
  2. Thomas, P.: Verteilte digitale Medienarchivsysteme für kooperative Fernsehproduktion : das Projekt EUROMEDIA (1998) 0.22
    0.21666336 = sum of:
      0.21666336 = product of:
        0.60184264 = sum of:
          0.025827685 = weight(abstract_txt:damit in 1023) [ClassicSimilarity], result of:
            0.025827685 = score(doc=1023,freq=1.0), product of:
              0.08319039 = queryWeight, product of:
                1.0083339 = boost
                4.9674363 = idf(docFreq=793, maxDocs=41962)
                0.016608732 = queryNorm
              0.31046477 = fieldWeight in 1023, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                4.9674363 = idf(docFreq=793, maxDocs=41962)
                0.0625 = fieldNorm(doc=1023)
          0.039888933 = weight(abstract_txt:beim in 1023) [ClassicSimilarity], result of:
            0.039888933 = score(doc=1023,freq=1.0), product of:
              0.11115213 = queryWeight, product of:
                1.1655387 = boost
                5.7418866 = idf(docFreq=365, maxDocs=41962)
                0.016608732 = queryNorm
              0.3588679 = fieldWeight in 1023, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                5.7418866 = idf(docFreq=365, maxDocs=41962)
                0.0625 = fieldNorm(doc=1023)
          0.018554365 = weight(abstract_txt:werden in 1023) [ClassicSimilarity], result of:
            0.018554365 = score(doc=1023,freq=1.0), product of:
              0.084073074 = queryWeight, product of:
                1.4335448 = boost
                3.5310931 = idf(docFreq=3338, maxDocs=41962)
                0.016608732 = queryNorm
              0.22069332 = fieldWeight in 1023, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                3.5310931 = idf(docFreq=3338, maxDocs=41962)
                0.0625 = fieldNorm(doc=1023)
          0.037336618 = weight(abstract_txt:eine in 1023) [ClassicSimilarity], result of:
            0.037336618 = score(doc=1023,freq=4.0), product of:
              0.08441692 = queryWeight, product of:
                1.4364733 = boost
                3.5383067 = idf(docFreq=3314, maxDocs=41962)
                0.016608732 = queryNorm
              0.44228834 = fieldWeight in 1023, product of:
                2.0 = tf(freq=4.0), with freq of:
                  4.0 = termFreq=4.0
                3.5383067 = idf(docFreq=3314, maxDocs=41962)
                0.0625 = fieldNorm(doc=1023)
          0.075796515 = weight(abstract_txt:bereitstellung in 1023) [ClassicSimilarity], result of:
            0.075796515 = score(doc=1023,freq=1.0), product of:
              0.17052275 = queryWeight, product of:
                1.4436402 = boost
                7.1119204 = idf(docFreq=92, maxDocs=41962)
                0.016608732 = queryNorm
              0.44449502 = fieldWeight in 1023, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                7.1119204 = idf(docFreq=92, maxDocs=41962)
                0.0625 = fieldNorm(doc=1023)
          0.0895136 = weight(abstract_txt:archiven in 1023) [ClassicSimilarity], result of:
            0.0895136 = score(doc=1023,freq=1.0), product of:
              0.1905207 = queryWeight, product of:
                1.5259451 = boost
                7.5173855 = idf(docFreq=61, maxDocs=41962)
                0.016608732 = queryNorm
              0.4698366 = fieldWeight in 1023, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                7.5173855 = idf(docFreq=61, maxDocs=41962)
                0.0625 = fieldNorm(doc=1023)
          0.0473415 = weight(abstract_txt:nicht in 1023) [ClassicSimilarity], result of:
            0.0473415 = score(doc=1023,freq=2.0), product of:
              0.13421905 = queryWeight, product of:
                2.0250926 = boost
                3.9905505 = idf(docFreq=2108, maxDocs=41962)
                0.016608732 = queryNorm
              0.35271817 = fieldWeight in 1023, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                3.9905505 = idf(docFreq=2108, maxDocs=41962)
                0.0625 = fieldNorm(doc=1023)
          0.099573046 = weight(abstract_txt:durch in 1023) [ClassicSimilarity], result of:
            0.099573046 = score(doc=1023,freq=3.0), product of:
              0.21532425 = queryWeight, product of:
                3.0349274 = boost
                4.2717733 = idf(docFreq=1591, maxDocs=41962)
                0.016608732 = queryNorm
              0.462433 = fieldWeight in 1023, product of:
                1.7320508 = tf(freq=3.0), with freq of:
                  3.0 = termFreq=3.0
                4.2717733 = idf(docFreq=1591, maxDocs=41962)
                0.0625 = fieldNorm(doc=1023)
          0.16801038 = weight(abstract_txt:digitalisierung in 1023) [ClassicSimilarity], result of:
            0.16801038 = score(doc=1023,freq=1.0), product of:
              0.39344764 = queryWeight, product of:
                3.467219 = boost
                6.8323355 = idf(docFreq=122, maxDocs=41962)
                0.016608732 = queryNorm
              0.42702097 = fieldWeight in 1023, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                6.8323355 = idf(docFreq=122, maxDocs=41962)
                0.0625 = fieldNorm(doc=1023)
        0.36 = coord(9/25)
    
  3. Prudlo, M.: E-Books für Bibliotheken : Ein Überblick (2006) 0.21
    0.21150437 = sum of:
      0.21150437 = product of:
        0.5287609 = sum of:
          0.05096893 = weight(abstract_txt:möglichkeiten in 23) [ClassicSimilarity], result of:
            0.05096893 = score(doc=23,freq=2.0), product of:
              0.10388269 = queryWeight, product of:
                1.1267807 = boost
                5.55095 = idf(docFreq=442, maxDocs=41962)
                0.016608732 = queryNorm
              0.4906393 = fieldWeight in 23, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                5.55095 = idf(docFreq=442, maxDocs=41962)
                0.0625 = fieldNorm(doc=23)
          0.04623184 = weight(abstract_txt:entwicklungen in 23) [ClassicSimilarity], result of:
            0.04623184 = score(doc=23,freq=1.0), product of:
              0.12264324 = queryWeight, product of:
                1.2243049 = boost
                6.0313916 = idf(docFreq=273, maxDocs=41962)
                0.016608732 = queryNorm
              0.37696198 = fieldWeight in 23, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                6.0313916 = idf(docFreq=273, maxDocs=41962)
                0.0625 = fieldNorm(doc=23)
          0.046829507 = weight(abstract_txt:folgenden in 23) [ClassicSimilarity], result of:
            0.046829507 = score(doc=23,freq=1.0), product of:
              0.12369797 = queryWeight, product of:
                1.2295582 = boost
                6.057271 = idf(docFreq=266, maxDocs=41962)
                0.016608732 = queryNorm
              0.37857944 = fieldWeight in 23, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                6.057271 = idf(docFreq=266, maxDocs=41962)
                0.0625 = fieldNorm(doc=23)
          0.026239835 = weight(abstract_txt:werden in 23) [ClassicSimilarity], result of:
            0.026239835 = score(doc=23,freq=2.0), product of:
              0.084073074 = queryWeight, product of:
                1.4335448 = boost
                3.5310931 = idf(docFreq=3338, maxDocs=41962)
                0.016608732 = queryNorm
              0.31210747 = fieldWeight in 23, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                3.5310931 = idf(docFreq=3338, maxDocs=41962)
                0.0625 = fieldNorm(doc=23)
          0.032334458 = weight(abstract_txt:eine in 23) [ClassicSimilarity], result of:
            0.032334458 = score(doc=23,freq=3.0), product of:
              0.08441692 = queryWeight, product of:
                1.4364733 = boost
                3.5383067 = idf(docFreq=3314, maxDocs=41962)
                0.016608732 = queryNorm
              0.38303292 = fieldWeight in 23, product of:
                1.7320508 = tf(freq=3.0), with freq of:
                  3.0 = termFreq=3.0
                3.5383067 = idf(docFreq=3314, maxDocs=41962)
                0.0625 = fieldNorm(doc=23)
          0.07055043 = weight(abstract_txt:buch in 23) [ClassicSimilarity], result of:
            0.07055043 = score(doc=23,freq=2.0), product of:
              0.14769633 = queryWeight, product of:
                1.6455015 = boost
                5.404244 = idf(docFreq=512, maxDocs=41962)
                0.016608732 = queryNorm
              0.4776722 = fieldWeight in 23, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                5.404244 = idf(docFreq=512, maxDocs=41962)
                0.0625 = fieldNorm(doc=23)
          0.065715946 = weight(abstract_txt:bisher in 23) [ClassicSimilarity], result of:
            0.065715946 = score(doc=23,freq=1.0), product of:
              0.1774845 = queryWeight, product of:
                1.8038219 = boost
                5.924208 = idf(docFreq=304, maxDocs=41962)
                0.016608732 = queryNorm
              0.370263 = fieldWeight in 23, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                5.924208 = idf(docFreq=304, maxDocs=41962)
                0.0625 = fieldNorm(doc=23)
          0.044845052 = weight(abstract_txt:bibliotheken in 23) [ClassicSimilarity], result of:
            0.044845052 = score(doc=23,freq=1.0), product of:
              0.1514151 = queryWeight, product of:
                1.9238331 = boost
                4.7387667 = idf(docFreq=997, maxDocs=41962)
                0.016608732 = queryNorm
              0.29617292 = fieldWeight in 23, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                4.7387667 = idf(docFreq=997, maxDocs=41962)
                0.0625 = fieldNorm(doc=23)
          0.08755639 = weight(abstract_txt:bereich in 23) [ClassicSimilarity], result of:
            0.08755639 = score(doc=23,freq=1.0), product of:
              0.25479335 = queryWeight, product of:
                2.7901776 = boost
                5.4981904 = idf(docFreq=466, maxDocs=41962)
                0.016608732 = queryNorm
              0.3436369 = fieldWeight in 23, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                5.4981904 = idf(docFreq=466, maxDocs=41962)
                0.0625 = fieldNorm(doc=23)
          0.057488523 = weight(abstract_txt:durch in 23) [ClassicSimilarity], result of:
            0.057488523 = score(doc=23,freq=1.0), product of:
              0.21532425 = queryWeight, product of:
                3.0349274 = boost
                4.2717733 = idf(docFreq=1591, maxDocs=41962)
                0.016608732 = queryNorm
              0.26698583 = fieldWeight in 23, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                4.2717733 = idf(docFreq=1591, maxDocs=41962)
                0.0625 = fieldNorm(doc=23)
        0.4 = coord(10/25)
    
  4. Lemanski, T.; Siebert, I.; Weber, R: Erschließung und Digitalisierung von Schulprogrammen : Bericht über ein Projekt der Universitäts- und Landesbibliothek Düsseldorf (2011) 0.21
    0.20616539 = sum of:
      0.20616539 = product of:
        0.5726816 = sum of:
          0.022599224 = weight(abstract_txt:damit in 1381) [ClassicSimilarity], result of:
            0.022599224 = score(doc=1381,freq=1.0), product of:
              0.08319039 = queryWeight, product of:
                1.0083339 = boost
                4.9674363 = idf(docFreq=793, maxDocs=41962)
                0.016608732 = queryNorm
              0.27165666 = fieldWeight in 1381, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                4.9674363 = idf(docFreq=793, maxDocs=41962)
                0.0546875 = fieldNorm(doc=1381)
          0.04097582 = weight(abstract_txt:folgenden in 1381) [ClassicSimilarity], result of:
            0.04097582 = score(doc=1381,freq=1.0), product of:
              0.12369797 = queryWeight, product of:
                1.2295582 = boost
                6.057271 = idf(docFreq=266, maxDocs=41962)
                0.016608732 = queryNorm
              0.33125702 = fieldWeight in 1381, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                6.057271 = idf(docFreq=266, maxDocs=41962)
                0.0546875 = fieldNorm(doc=1381)
          0.03247014 = weight(abstract_txt:werden in 1381) [ClassicSimilarity], result of:
            0.03247014 = score(doc=1381,freq=4.0), product of:
              0.084073074 = queryWeight, product of:
                1.4335448 = boost
                3.5310931 = idf(docFreq=3338, maxDocs=41962)
                0.016608732 = queryNorm
              0.3862133 = fieldWeight in 1381, product of:
                2.0 = tf(freq=4.0), with freq of:
                  4.0 = termFreq=4.0
                3.5310931 = idf(docFreq=3338, maxDocs=41962)
                0.0546875 = fieldNorm(doc=1381)
          0.03266954 = weight(abstract_txt:eine in 1381) [ClassicSimilarity], result of:
            0.03266954 = score(doc=1381,freq=4.0), product of:
              0.08441692 = queryWeight, product of:
                1.4364733 = boost
                3.5383067 = idf(docFreq=3314, maxDocs=41962)
                0.016608732 = queryNorm
              0.3870023 = fieldWeight in 1381, product of:
                2.0 = tf(freq=4.0), with freq of:
                  4.0 = termFreq=4.0
                3.5383067 = idf(docFreq=3314, maxDocs=41962)
                0.0546875 = fieldNorm(doc=1381)
          0.05750145 = weight(abstract_txt:bisher in 1381) [ClassicSimilarity], result of:
            0.05750145 = score(doc=1381,freq=1.0), product of:
              0.1774845 = queryWeight, product of:
                1.8038219 = boost
                5.924208 = idf(docFreq=304, maxDocs=41962)
                0.016608732 = queryNorm
              0.32398012 = fieldWeight in 1381, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                5.924208 = idf(docFreq=304, maxDocs=41962)
                0.0546875 = fieldNorm(doc=1381)
          0.05549292 = weight(abstract_txt:bibliotheken in 1381) [ClassicSimilarity], result of:
            0.05549292 = score(doc=1381,freq=2.0), product of:
              0.1514151 = queryWeight, product of:
                1.9238331 = boost
                4.7387667 = idf(docFreq=997, maxDocs=41962)
                0.016608732 = queryNorm
              0.36649528 = fieldWeight in 1381, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                4.7387667 = idf(docFreq=997, maxDocs=41962)
                0.0546875 = fieldNorm(doc=1381)
          0.029291056 = weight(abstract_txt:nicht in 1381) [ClassicSimilarity], result of:
            0.029291056 = score(doc=1381,freq=1.0), product of:
              0.13421905 = queryWeight, product of:
                2.0250926 = boost
                3.9905505 = idf(docFreq=2108, maxDocs=41962)
                0.016608732 = queryNorm
              0.21823323 = fieldWeight in 1381, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                3.9905505 = idf(docFreq=2108, maxDocs=41962)
                0.0546875 = fieldNorm(doc=1381)
          0.1546724 = weight(abstract_txt:alten in 1381) [ClassicSimilarity], result of:
            0.1546724 = score(doc=1381,freq=1.0), product of:
              0.37782964 = queryWeight, product of:
                3.0390007 = boost
                7.4856367 = idf(docFreq=63, maxDocs=41962)
                0.016608732 = queryNorm
              0.40937075 = fieldWeight in 1381, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                7.4856367 = idf(docFreq=63, maxDocs=41962)
                0.0546875 = fieldNorm(doc=1381)
          0.14700909 = weight(abstract_txt:digitalisierung in 1381) [ClassicSimilarity], result of:
            0.14700909 = score(doc=1381,freq=1.0), product of:
              0.39344764 = queryWeight, product of:
                3.467219 = boost
                6.8323355 = idf(docFreq=122, maxDocs=41962)
                0.016608732 = queryNorm
              0.37364334 = fieldWeight in 1381, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                6.8323355 = idf(docFreq=122, maxDocs=41962)
                0.0546875 = fieldNorm(doc=1381)
        0.36 = coord(9/25)
    
  5. Förster, F.: Bibliographischer und universeller Zugriff : Schriftliche historische Quellen und Werke der fiktionalen Literatur in FRBR (2010) 0.20
    0.20277269 = sum of:
      0.20277269 = product of:
        0.5069317 = sum of:
          0.036525864 = weight(abstract_txt:damit in 964) [ClassicSimilarity], result of:
            0.036525864 = score(doc=964,freq=2.0), product of:
              0.08319039 = queryWeight, product of:
                1.0083339 = boost
                4.9674363 = idf(docFreq=793, maxDocs=41962)
                0.016608732 = queryNorm
              0.4390635 = fieldWeight in 964, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                4.9674363 = idf(docFreq=793, maxDocs=41962)
                0.0625 = fieldNorm(doc=964)
          0.043168604 = weight(abstract_txt:zukunft in 964) [ClassicSimilarity], result of:
            0.043168604 = score(doc=964,freq=1.0), product of:
              0.11716417 = queryWeight, product of:
                1.1966447 = boost
                5.895127 = idf(docFreq=313, maxDocs=41962)
                0.016608732 = queryNorm
              0.36844543 = fieldWeight in 964, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                5.895127 = idf(docFreq=313, maxDocs=41962)
                0.0625 = fieldNorm(doc=964)
          0.032137103 = weight(abstract_txt:werden in 964) [ClassicSimilarity], result of:
            0.032137103 = score(doc=964,freq=3.0), product of:
              0.084073074 = queryWeight, product of:
                1.4335448 = boost
                3.5310931 = idf(docFreq=3338, maxDocs=41962)
                0.016608732 = queryNorm
              0.38225204 = fieldWeight in 964, product of:
                1.7320508 = tf(freq=3.0), with freq of:
                  3.0 = termFreq=3.0
                3.5310931 = idf(docFreq=3338, maxDocs=41962)
                0.0625 = fieldNorm(doc=964)
          0.032334458 = weight(abstract_txt:eine in 964) [ClassicSimilarity], result of:
            0.032334458 = score(doc=964,freq=3.0), product of:
              0.08441692 = queryWeight, product of:
                1.4364733 = boost
                3.5383067 = idf(docFreq=3314, maxDocs=41962)
                0.016608732 = queryNorm
              0.38303292 = fieldWeight in 964, product of:
                1.7320508 = tf(freq=3.0), with freq of:
                  3.0 = termFreq=3.0
                3.5383067 = idf(docFreq=3314, maxDocs=41962)
                0.0625 = fieldNorm(doc=964)
          0.0895136 = weight(abstract_txt:archiven in 964) [ClassicSimilarity], result of:
            0.0895136 = score(doc=964,freq=1.0), product of:
              0.1905207 = queryWeight, product of:
                1.5259451 = boost
                7.5173855 = idf(docFreq=61, maxDocs=41962)
                0.016608732 = queryNorm
              0.4698366 = fieldWeight in 964, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                7.5173855 = idf(docFreq=61, maxDocs=41962)
                0.0625 = fieldNorm(doc=964)
          0.04988669 = weight(abstract_txt:buch in 964) [ClassicSimilarity], result of:
            0.04988669 = score(doc=964,freq=1.0), product of:
              0.14769633 = queryWeight, product of:
                1.6455015 = boost
                5.404244 = idf(docFreq=512, maxDocs=41962)
                0.016608732 = queryNorm
              0.33776525 = fieldWeight in 964, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                5.404244 = idf(docFreq=512, maxDocs=41962)
                0.0625 = fieldNorm(doc=964)
          0.044845052 = weight(abstract_txt:bibliotheken in 964) [ClassicSimilarity], result of:
            0.044845052 = score(doc=964,freq=1.0), product of:
              0.1514151 = queryWeight, product of:
                1.9238331 = boost
                4.7387667 = idf(docFreq=997, maxDocs=41962)
                0.016608732 = queryNorm
              0.29617292 = fieldWeight in 964, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                4.7387667 = idf(docFreq=997, maxDocs=41962)
                0.0625 = fieldNorm(doc=964)
          0.033475492 = weight(abstract_txt:nicht in 964) [ClassicSimilarity], result of:
            0.033475492 = score(doc=964,freq=1.0), product of:
              0.13421905 = queryWeight, product of:
                2.0250926 = boost
                3.9905505 = idf(docFreq=2108, maxDocs=41962)
                0.016608732 = queryNorm
              0.2494094 = fieldWeight in 964, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                3.9905505 = idf(docFreq=2108, maxDocs=41962)
                0.0625 = fieldNorm(doc=964)
          0.08755639 = weight(abstract_txt:bereich in 964) [ClassicSimilarity], result of:
            0.08755639 = score(doc=964,freq=1.0), product of:
              0.25479335 = queryWeight, product of:
                2.7901776 = boost
                5.4981904 = idf(docFreq=466, maxDocs=41962)
                0.016608732 = queryNorm
              0.3436369 = fieldWeight in 964, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                5.4981904 = idf(docFreq=466, maxDocs=41962)
                0.0625 = fieldNorm(doc=964)
          0.057488523 = weight(abstract_txt:durch in 964) [ClassicSimilarity], result of:
            0.057488523 = score(doc=964,freq=1.0), product of:
              0.21532425 = queryWeight, product of:
                3.0349274 = boost
                4.2717733 = idf(docFreq=1591, maxDocs=41962)
                0.016608732 = queryNorm
              0.26698583 = fieldWeight in 964, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                4.2717733 = idf(docFreq=1591, maxDocs=41962)
                0.0625 = fieldNorm(doc=964)
        0.4 = coord(10/25)