Search (32 results, page 1 of 2)

0.045759358 = product of:
  0.091518715 = sum of:
    0.091518715 = product of:
      0.18303743 = sum of:
        0.18303743 = weight(_text_:v in 8315) [ClassicSimilarity], result of:
          0.18303743 = score(doc=8315,freq=2.0), product of:
            0.24291293 = queryWeight, product of:
              4.871427 = idf(docFreq=920, maxDocs=44218)
              0.04986484 = queryNorm
            0.7535104 = fieldWeight in 8315, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              4.871427 = idf(docFreq=920, maxDocs=44218)
              0.109375 = fieldNorm(doc=8315)
      0.5 = coord(1/2)
  0.5 = coord(1/2)

Pages

V,127 S

0.032685254 = product of:
  0.06537051 = sum of:
    0.06537051 = product of:
      0.13074102 = sum of:
        0.13074102 = weight(_text_:v in 2098) [ClassicSimilarity], result of:
          0.13074102 = score(doc=2098,freq=2.0), product of:
            0.24291293 = queryWeight, product of:
              4.871427 = idf(docFreq=920, maxDocs=44218)
              0.04986484 = queryNorm
            0.5382217 = fieldWeight in 2098, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              4.871427 = idf(docFreq=920, maxDocs=44218)
              0.078125 = fieldNorm(doc=2098)
      0.5 = coord(1/2)
  0.5 = coord(1/2)

0.03066722 = sum of:
  0.017593117 = product of:
    0.07037247 = sum of:
      0.07037247 = weight(_text_:author's in 2824) [ClassicSimilarity], result of:
        0.07037247 = score(doc=2824,freq=4.0), product of:
          0.33509937 = queryWeight, product of:
            6.7201533 = idf(docFreq=144, maxDocs=44218)
            0.04986484 = queryNorm
          0.21000479 = fieldWeight in 2824, product of:
            2.0 = tf(freq=4.0), with freq of:
              4.0 = termFreq=4.0
            6.7201533 = idf(docFreq=144, maxDocs=44218)
            0.015625 = fieldNorm(doc=2824)
    0.25 = coord(1/4)
  0.013074102 = product of:
    0.026148204 = sum of:
      0.026148204 = weight(_text_:v in 2824) [ClassicSimilarity], result of:
        0.026148204 = score(doc=2824,freq=2.0), product of:
          0.24291293 = queryWeight, product of:
            4.871427 = idf(docFreq=920, maxDocs=44218)
            0.04986484 = queryNorm
          0.10764434 = fieldWeight in 2824, product of:
            1.4142135 = tf(freq=2.0), with freq of:
              2.0 = termFreq=2.0
            4.871427 = idf(docFreq=920, maxDocs=44218)
            0.015625 = fieldNorm(doc=2824)
    0.5 = coord(1/2)

Footnote

Rez. in: KO 32(2005) no.1, S.47-49 (M. Hudon): "Vanda Broughton's Essential Classification is the most recent addition to a very small set of classification textbooks published over the past few years. The book's 21 chapters are based very closely an the cataloguing and classification module at the School of Library, Archive, and Information studies at University College, London. The author's main objective is clear: this is "first and foremost a book about how to classify. The emphasis throughout is an the activity of classification rather than the theory, the practical problems of the organization of collections, and the needs of the users" (p. 1). This is not a theoretical work, but a basic course in classification and classification scheme application. For this reviewer, who also teaches "Classification 101," this is also a fascinating peek into how a colleague organizes content and structures her course. "Classification is everywhere" (p. 1): the first sentence of this book is also one of the first statements in my own course, and Professor Broughton's metaphors - the supermarket, canned peas, flowers, etc. - are those that are used by our colleagues around the world. The combination of tone, writing style and content display are reader-friendly; they are in fact what make this book remarkable and what distinguishes it from more "formal" textbooks, such as The Organization of Information, the superb text written and recently updated (2004) by Professor Arlene Taylor (2nd ed. Westport, Conn.: Libraries Unlimited, 2004). Reading Essential Classification, at times, feels like being in a classroom, facing a teacher who assures you that "you don't need to worry about this at this stage" (p. 104), and reassures you that, although you now speed a long time looking for things, "you will soon speed up when you get to know the scheme better" (p. 137). This teacher uses redundancy in a productive fashion, and she is not afraid to express her own opinions ("I think that if these concepts are helpful they may be used" (p. 245); "It's annoying that LCC doesn't provide clearer instructions, but if you keep your head and take them one step at a time [i.e. the tables] they're fairly straightforward" (p. 174)). Chapters 1 to 7 present the essential theoretical concepts relating to knowledge organization and to bibliographic classification. The author is adept at making and explaining distinctions: known-item retrieval versus subject retrieval, personal versus public/shared/official classification systems, scientific versus folk classification systems, object versus aspect classification systems, semantic versus syntactic relationships, and so on. Chapters 8 and 9 discuss the practice of classification, through content analysis and subject description. A short discussion of difficult subjects, namely the treatment of unique concepts (persons, places, etc.) as subjects seems a little advanced for a beginners' class.
Essential Classification is also an exercise book. Indeed, it contains a number of practical exercises and activities in every chapter, along with suggested answers. Unfortunately, the answers are too often provided without the justifications and explanations that students would no doubt demand. The author has taken great care to explain all technical terms in her text, but formal definitions are also gathered in an extensive 172-term Glossary; appropriately, these terms appear in bold type the first time they are used in the text. A short, very short, annotated bibliography of standard classification textbooks and of manuals for the use of major classification schemes is provided. A detailed 11-page index completes the set of learning aids which will be useful to an audience of students in their effort to grasp the basic concepts of the theory and the practice of document classification in a traditional environment. Essential Classification is a fine textbook. However, this reviewer deplores the fact that it presents only a very "traditional" view of classification, without much reference to newer environments such as the Internet where classification also manifests itself in various forms. In Essential Classification, books are always used as examples, and we have to take the author's word that traditional classification practices and tools can also be applied to other types of documents and elsewhere than in the traditional library. Vanda Broughton writes, for example, that "Subject headings can't be used for physical arrangement" (p. 101), but this is not entirely true. Subject headings can be used for physical arrangement of vertical files, for example, with each folder bearing a simple or complex heading which is then used for internal organization. And if it is true that subject headings cannot be reproduced an the spine of [physical] books (p. 93), the situation is certainly different an the World Wide Web where subject headings as metadata can be most useful in ordering a collection of hot links. The emphasis is also an the traditional paperbased, rather than an the electronic version of classification schemes, with excellent justifications of course. The reality is, however, that supporting organizations (LC, OCLC, etc.) are now providing great quality services online, and that updates are now available only in an electronic format and not anymore on paper. E-based versions of classification schemes could be safely ignored in a theoretical text, but they have to be described and explained in a textbook published in 2005. One last comment: Professor Broughton tends to use the same term, "classification" to represent the process (as in classification is grouping) and the tool (as in constructing a classification, using a classification, etc.). Even in the Glossary where classification is first well-defined as a process, and classification scheme as "a set of classes ...", the definition of classification scheme continues: "the classification consists of a vocabulary (...) and syntax..." (p. 296-297). Such an ambiguous use of the term classification seems unfortunate and unnecessarily confusing in an otherwise very good basic textbook an categorization of concepts and subjects, document organization and subject representation."

0.02364599 = product of:
  0.04729198 = sum of:
    0.04729198 = product of:
      0.09458396 = sum of:
        0.09458396 = weight(_text_:22 in 3247) [ClassicSimilarity], result of:
          0.09458396 = score(doc=3247,freq=2.0), product of:
            0.17461817 = queryWeight, product of:
              3.5018296 = idf(docFreq=3622, maxDocs=44218)
              0.04986484 = queryNorm
            0.5416616 = fieldWeight in 3247, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              3.5018296 = idf(docFreq=3622, maxDocs=44218)
              0.109375 = fieldNorm(doc=3247)
      0.5 = coord(1/2)
  0.5 = coord(1/2)

Object

DDC-22

0.020267991 = product of:
  0.040535983 = sum of:
    0.040535983 = product of:
      0.081071965 = sum of:
        0.081071965 = weight(_text_:22 in 4589) [ClassicSimilarity], result of:
          0.081071965 = score(doc=4589,freq=2.0), product of:
            0.17461817 = queryWeight, product of:
              3.5018296 = idf(docFreq=3622, maxDocs=44218)
              0.04986484 = queryNorm
            0.46428138 = fieldWeight in 4589, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              3.5018296 = idf(docFreq=3622, maxDocs=44218)
              0.09375 = fieldNorm(doc=4589)
      0.5 = coord(1/2)
  0.5 = coord(1/2)

Series

Heyne Business; 22/1019

0.020267991 = product of:
  0.040535983 = sum of:
    0.040535983 = product of:
      0.081071965 = sum of:
        0.081071965 = weight(_text_:22 in 6774) [ClassicSimilarity], result of:
          0.081071965 = score(doc=6774,freq=2.0), product of:
            0.17461817 = queryWeight, product of:
              3.5018296 = idf(docFreq=3622, maxDocs=44218)
              0.04986484 = queryNorm
            0.46428138 = fieldWeight in 6774, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              3.5018296 = idf(docFreq=3622, maxDocs=44218)
              0.09375 = fieldNorm(doc=6774)
      0.5 = coord(1/2)
  0.5 = coord(1/2)

Date

25. 3.2019 18:15:22

0.019108847 = product of:
  0.038217694 = sum of:
    0.038217694 = product of:
      0.07643539 = sum of:
        0.07643539 = weight(_text_:22 in 770) [ClassicSimilarity], result of:
          0.07643539 = score(doc=770,freq=4.0), product of:
            0.17461817 = queryWeight, product of:
              3.5018296 = idf(docFreq=3622, maxDocs=44218)
              0.04986484 = queryNorm
            0.4377287 = fieldWeight in 770, product of:
              2.0 = tf(freq=4.0), with freq of:
                4.0 = termFreq=4.0
              3.5018296 = idf(docFreq=3622, maxDocs=44218)
              0.0625 = fieldNorm(doc=770)
      0.5 = coord(1/2)
  0.5 = coord(1/2)

Date

26. 7.2002 14:01:22

Footnote

Rez. in: Journal of documentation 49(1993) no.1, S.68-70. (A. Maltby); Journal of librarianship and information science 1993, S.108-109 (A.G. Curwen); Herald of library science 33(1994) nos.1/2, S.85 (P.N. Kaula); Knowledge organization 22(1995) no.1, S.45 (M.P. Satija)

0.01866032 = product of:
  0.03732064 = sum of:
    0.03732064 = product of:
      0.14928256 = sum of:
        0.14928256 = weight(_text_:author's in 797) [ClassicSimilarity], result of:
          0.14928256 = score(doc=797,freq=2.0), product of:
            0.33509937 = queryWeight, product of:
              6.7201533 = idf(docFreq=144, maxDocs=44218)
              0.04986484 = queryNorm
            0.44548744 = fieldWeight in 797, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              6.7201533 = idf(docFreq=144, maxDocs=44218)
              0.046875 = fieldNorm(doc=797)
      0.25 = coord(1/4)
  0.5 = coord(1/2)

Abstract

This companion to the author's 'Descriptive cataloging' provides both the principles and the application of subject cataloging. For most libraries, there are two distinct features of this practice: subject classification and apllication of subject headings. This workbook presents a wide range of examples, including print and nonprint formats, as well as exercises for MARC tagging practice. The explanation of the rules applied are clear, with specific reference to the manual used. The section about subject cataloging strategies is excellent for all catalogers. Highly recommended for all libraries using either Dewey Decimal or Library of Congress classification, as well as the Library of Congress Subject Headings

0.01787469 = product of:
  0.03574938 = sum of:
    0.03574938 = product of:
      0.07149876 = sum of:
        0.07149876 = weight(_text_:22 in 1842) [ClassicSimilarity], result of:
          0.07149876 = score(doc=1842,freq=14.0), product of:
            0.17461817 = queryWeight, product of:
              3.5018296 = idf(docFreq=3622, maxDocs=44218)
              0.04986484 = queryNorm
            0.4094577 = fieldWeight in 1842, product of:
              3.7416575 = tf(freq=14.0), with freq of:
                14.0 = termFreq=14.0
              3.5018296 = idf(docFreq=3622, maxDocs=44218)
              0.03125 = fieldNorm(doc=1842)
      0.5 = coord(1/2)
  0.5 = coord(1/2)

Abstract

A system of library classification that flashed across the inquiring mind of young Melvil Louis Kossuth Dewey (known as Melvil Dewey) in 1873 is still the most popular classification scheme.. The modern library classification begins with Dewey Decimal Classification (DDC). Melvil Dewey devised DDC in 1876. DDC has is credit of 128 years of boudless success. The DDC is being taught as a practical subject throughout the world and it is being used in majority of libraries in about 150 countries. This is the result of continuous revision that 22nd Edition of DDC has been published in July 2003. No other classification scheme has published so many editions. Some welcome changes have been made in DDC 22. To reduce the Christian bias in 200 religion, the numbers 201 to 209 have been devoted to specific aspects of religion. In the previous editions these numbers were devoted to Christianity. to enhance the classifier's efficiency, Table 7 has been removed from DDC 22 and the provision of adding group of persons is made by direct use of notation already available in schedules and in notation -08 from Table 1 Standard Subdivision. The present book is an attempt to explain, with suitable examples, the salient provisions of DDC 22. The book is written in simple language so that the students may not face any difficulty in understanding what is being explained. The examples in the book are explained in a step-by-step procedure. It is hoped that this book will prove of great help and use to the library professionals in general and library and information science students in particular.

Content

1. Introduction to DDC 22 2. Major changes in DDC 22 3. Introduction to the schedules 4. Use of Table 1 : Standard Subdivisions 5. Use of Table 2 : Areas 6. Use of Table 3 : Subdivisions for the arts, for individual literatures, for specific literary forms 7. Use to Table 4 : Subdivisions of individual languages and language families 8. Use of Table 5 : Ethic and National groups 9. Use of Table 6 : Languages 10. Treatment of Groups of Persons

Object

DDC-22

0.016889993 = product of:
  0.033779986 = sum of:
    0.033779986 = product of:
      0.06755997 = sum of:
        0.06755997 = weight(_text_:22 in 127) [ClassicSimilarity], result of:
          0.06755997 = score(doc=127,freq=2.0), product of:
            0.17461817 = queryWeight, product of:
              3.5018296 = idf(docFreq=3622, maxDocs=44218)
              0.04986484 = queryNorm
            0.38690117 = fieldWeight in 127, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              3.5018296 = idf(docFreq=3622, maxDocs=44218)
              0.078125 = fieldNorm(doc=127)
      0.5 = coord(1/2)
  0.5 = coord(1/2)

Footnote

Zugleich Dissertation Univ. Düsseldorf. - Rez. in: ZfBB. 22(1975) S.53-57 (H.-A. Koch)

0.016889993 = product of:
  0.033779986 = sum of:
    0.033779986 = product of:
      0.06755997 = sum of:
        0.06755997 = weight(_text_:22 in 667) [ClassicSimilarity], result of:
          0.06755997 = score(doc=667,freq=2.0), product of:
            0.17461817 = queryWeight, product of:
              3.5018296 = idf(docFreq=3622, maxDocs=44218)
              0.04986484 = queryNorm
            0.38690117 = fieldWeight in 667, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              3.5018296 = idf(docFreq=3622, maxDocs=44218)
              0.078125 = fieldNorm(doc=667)
      0.5 = coord(1/2)
  0.5 = coord(1/2)

Date

15. 7.2002 20:48:22

0.016889993 = product of:
  0.033779986 = sum of:
    0.033779986 = product of:
      0.06755997 = sum of:
        0.06755997 = weight(_text_:22 in 668) [ClassicSimilarity], result of:
          0.06755997 = score(doc=668,freq=2.0), product of:
            0.17461817 = queryWeight, product of:
              3.5018296 = idf(docFreq=3622, maxDocs=44218)
              0.04986484 = queryNorm
            0.38690117 = fieldWeight in 668, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              3.5018296 = idf(docFreq=3622, maxDocs=44218)
              0.078125 = fieldNorm(doc=668)
      0.5 = coord(1/2)
  0.5 = coord(1/2)

Signature

77 TWP 3911(2)+22

0.016889993 = product of:
  0.033779986 = sum of:
    0.033779986 = product of:
      0.06755997 = sum of:
        0.06755997 = weight(_text_:22 in 885) [ClassicSimilarity], result of:
          0.06755997 = score(doc=885,freq=2.0), product of:
            0.17461817 = queryWeight, product of:
              3.5018296 = idf(docFreq=3622, maxDocs=44218)
              0.04986484 = queryNorm
            0.38690117 = fieldWeight in 885, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              3.5018296 = idf(docFreq=3622, maxDocs=44218)
              0.078125 = fieldNorm(doc=885)
      0.5 = coord(1/2)
  0.5 = coord(1/2)

Footnote

Rez. in: Knowledge organization 22(1995) no.3/4, S.178-179 (M.P. Satija); Journal of documentation 51(1995) no.4, S.437-439 (R. Brunt)

0.016889993 = product of:
  0.033779986 = sum of:
    0.033779986 = product of:
      0.06755997 = sum of:
        0.06755997 = weight(_text_:22 in 4594) [ClassicSimilarity], result of:
          0.06755997 = score(doc=4594,freq=2.0), product of:
            0.17461817 = queryWeight, product of:
              3.5018296 = idf(docFreq=3622, maxDocs=44218)
              0.04986484 = queryNorm
            0.38690117 = fieldWeight in 4594, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              3.5018296 = idf(docFreq=3622, maxDocs=44218)
              0.078125 = fieldNorm(doc=4594)
      0.5 = coord(1/2)
  0.5 = coord(1/2)

Object

DDC-22

0.016342627 = product of:
  0.032685254 = sum of:
    0.032685254 = product of:
      0.06537051 = sum of:
        0.06537051 = weight(_text_:v in 395) [ClassicSimilarity], result of:
          0.06537051 = score(doc=395,freq=2.0), product of:
            0.24291293 = queryWeight, product of:
              4.871427 = idf(docFreq=920, maxDocs=44218)
              0.04986484 = queryNorm
            0.26911086 = fieldWeight in 395, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              4.871427 = idf(docFreq=920, maxDocs=44218)
              0.0390625 = fieldNorm(doc=395)
      0.5 = coord(1/2)
  0.5 = coord(1/2)

0.015550266 = product of:
  0.031100532 = sum of:
    0.031100532 = product of:
      0.12440213 = sum of:
        0.12440213 = weight(_text_:author's in 161) [ClassicSimilarity], result of:
          0.12440213 = score(doc=161,freq=2.0), product of:
            0.33509937 = queryWeight, product of:
              6.7201533 = idf(docFreq=144, maxDocs=44218)
              0.04986484 = queryNorm
            0.3712395 = fieldWeight in 161, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              6.7201533 = idf(docFreq=144, maxDocs=44218)
              0.0390625 = fieldNorm(doc=161)
      0.25 = coord(1/4)
  0.5 = coord(1/2)

Abstract

This book is an extension and total revision of the author's earlier Guide to the use of UDC. The original was written in 1993 and in the intervening years much has happened with the classification. In particular, a much more rigorous approach has been undertaken in revision to ensure that the scheme is able to handle the requirements of a networked world. The book outlines the history and development of the Universal Decimal Classification, provides practical hints on its application and works through all the auxiliary and main tables highlighting aspects that need to be noted in applying the scheme. It also provides guidance on the use of the Master Reference File and discusses the ways in which the classification is used in the 21st century and its suitability as an aid to subject description in tagging metadata and consequently for application on the Internet. It is intended as a source for information about the scheme, for practical usage by classifiers in their daily work and as a guide to the student learning how to apply the classification. It is amply provided with examples to illustrate the many ways in which the scheme can be applied and will be a useful source for a wide range of information workers

0.013511995 = product of:
  0.02702399 = sum of:
    0.02702399 = product of:
      0.05404798 = sum of:
        0.05404798 = weight(_text_:22 in 2686) [ClassicSimilarity], result of:
          0.05404798 = score(doc=2686,freq=2.0), product of:
            0.17461817 = queryWeight, product of:
              3.5018296 = idf(docFreq=3622, maxDocs=44218)
              0.04986484 = queryNorm
            0.30952093 = fieldWeight in 2686, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              3.5018296 = idf(docFreq=3622, maxDocs=44218)
              0.0625 = fieldNorm(doc=2686)
      0.5 = coord(1/2)
  0.5 = coord(1/2)

Date

10. 9.2004 10:22:40

0.013511995 = product of:
  0.02702399 = sum of:
    0.02702399 = product of:
      0.05404798 = sum of:
        0.05404798 = weight(_text_:22 in 217) [ClassicSimilarity], result of:
          0.05404798 = score(doc=217,freq=2.0), product of:
            0.17461817 = queryWeight, product of:
              3.5018296 = idf(docFreq=3622, maxDocs=44218)
              0.04986484 = queryNorm
            0.30952093 = fieldWeight in 217, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              3.5018296 = idf(docFreq=3622, maxDocs=44218)
              0.0625 = fieldNorm(doc=217)
      0.5 = coord(1/2)
  0.5 = coord(1/2)

Date

22. 4.2007 10:07:51

0.011555983 = product of:
  0.023111966 = sum of:
    0.023111966 = product of:
      0.04622393 = sum of:
        0.04622393 = weight(_text_:v in 38) [ClassicSimilarity], result of:
          0.04622393 = score(doc=38,freq=4.0), product of:
            0.24291293 = queryWeight, product of:
              4.871427 = idf(docFreq=920, maxDocs=44218)
              0.04986484 = queryNorm
            0.19029012 = fieldWeight in 38, product of:
              2.0 = tf(freq=4.0), with freq of:
                4.0 = termFreq=4.0
              4.871427 = idf(docFreq=920, maxDocs=44218)
              0.01953125 = fieldNorm(doc=38)
      0.5 = coord(1/2)
  0.5 = coord(1/2)

Footnote

Rez. in: VÖB-Mitteilungen 58(2005) H.3, S.102-104 (R.F. Müller); ZfBB 53(2006) H.5, S.282-283 (L. Svensson): "Das Sammeln und Verzeichnen elektronischer Ressourcen gehört in wissenschaftlichen Bibliotheken längst zum Alltag. Parallel dazu kündigt sich ein Paradigmenwechsel bei den Findmitteln an: Um einen effizienten und benutzerorientierten Zugang zu den gemischten Kollektionen bieten zu können, experimentieren einige bibliothekarische Diensteanbieter wie z. B. das hbz (http://suchen.hbz-nrw.de/dreilaender/), die Bibliothek der North Carolina State University (www.lib.ncsu.edu/) und demnächst vascoda (www.vascoda.de/) und der Librarians-Internet Index (www.lii.org/) zunehmend mit Suchmaschinentechnologie. Dabei wird angestrebt, nicht nur einen vollinvertierten Suchindex anzubieten, sondern auch das Browsing durch eine hierarchisch geordnete Klassifikation. Von den Daten in den deutschen Verbunddatenbanken ist jedoch nur ein kleiner Teil schon klassifikatorisch erschlossen. Fremddaten aus dem angloamerikanischen Bereich sind oft mit LCC und/oder DDC erschlossen, wobei die Library of Congress sich bei der DDCErschließung auf Titel, die hauptsächlich für die Public Libraries interessant sind, konzentriert. Die Deutsche Nationalbibliothek wird ab 2007 Printmedien und Hochschulschriften flächendeckend mit DDC erschließen. Es ist aber schon offensichtlich, dass v. a. im Bereich der elektronischen Publikationen die anfallenden Dokumentenmengen mit immer knapperen Personalressourcen nicht intellektuell erschlossen werden können, sondern dass neue Verfahren entwickelt werden müssen. Hier kommt Oberhausers Buch gerade richtig. Seit Anfang der 1990er Jahre sind mehrere Projekte zum Thema automatisches Klassifizieren durchgeführt worden. Wer sich in diese Thematik einarbeiten wollte oder sich für die Ergebnisse der größeren Projekte interessierte, konnte bislang auf keine Überblicksdarstellung zurückgreifen, sondern war auf eine Vielzahl von Einzeluntersuchungen sowie die Projektdokumentationen angewiesen. Oberhausers Darstellung, die auf einer Fülle von publizierter und grauer Literatur fußt, schließt diese Lücke. Das selbst gesetzte Ziel, einen guten Überblick über den momentanen Kenntnisstand und die Ergebnisse der einschlägigen Projekte verständlich zu vermitteln, erfüllt der Autor mit Bravour. Dabei ist anzumerken, dass er ein bibliothekarisches Grundwissen und mindestens grundlegende Kenntnisse über informationswissenschaftliche Grundbegriffe und Fragestellungen voraussetzt, wobei hier für den Einsteiger einige Hinweise auf einführende Darstellungen wünschenswert gewesen wären.
Zum Inhalt Auf einen kurzen einleitenden Abschnitt folgt eine Einführung in die grundlegende Methodik des automatischen Klassifizierens. Oberhauser erklärt hier Begriffe wie Einfach- und Mehrfachklassifizierung, Klassen- und Dokumentzentrierung, und geht danach auf die hauptsächlichen Anwendungen der automatischen Klassifikation von Textdokumenten, maschinelle Lernverfahren und Techniken der Dimensionsreduktion bei der Indexierung ein. Zwei weitere Unterkapitel sind der Erstellung von Klassifikatoren und den Methoden für deren Auswertung gewidmet. Das Kapitel wird abgerundet von einer kurzen Auflistung einiger Softwareprodukte für automatisches Klassifizieren, die sowohl kommerzielle Software, als auch Projekte aus dem Open-Source-Bereich umfasst. Der Hauptteil des Buches ist den großen Projekten zur automatischen Erschließung von Webdokumenten gewidmet, die von OCLC (Scorpion) sowie an den Universitäten Lund (Nordic WAIS/WWW, DESIRE II), Wolverhampton (WWLib-TOS, WWLib-TNG, Old ACE, ACE) und Oldenburg (GERHARD, GERHARD II) durchgeführt worden sind. Der Autor beschreibt hier sehr detailliert - wobei der Detailliertheitsgrad unterschiedlich ist, je nachdem, was aus der Projektdokumentation geschlossen werden kann - die jeweilige Zielsetzung des Projektes, die verwendete Klassifikation, die methodische Vorgehensweise sowie die Evaluierungsmethoden und -ergebnisse. Sofern Querverweise zu anderen Projekten bestehen, werden auch diese besprochen. Der Verfasser geht hier sehr genau auf wichtige Aspekte wie Vokabularbildung, Textaufbereitung und Gewichtung ein, so dass der Leser eine gute Vorstellung von den Ansätzen und der möglichen Weiterentwicklung des Projektes bekommt. In einem weiteren Kapitel wird auf einige kleinere Projekte eingegangen, die dem für Bibliotheken besonders interessanten Thema des automatischen Klassifizierens von Büchern sowie den Bereichen Patentliteratur, Mediendokumentation und dem Einsatz bei Informationsdiensten gewidmet sind. Die Darstellung wird ergänzt von einem Literaturverzeichnis mit über 250 Titeln zu den konkreten Projekten sowie einem Abkürzungs- und einem Abbildungsverzeichnis. In der abschließenden Diskussion der beschriebenen Projekte wird einerseits auf die Bedeutung der einzelnen Projekte für den methodischen Fortschritt eingegangen, andererseits aber auch einiges an Kritik geäußert, v. a. bezüglich der mangelnden Auswertung der Projektergebnisse und des Fehlens an brauchbarer Dokumentation. So waren z. B. die Projektseiten des Projekts GERHARD (www.gerhard.de/) auf den Stand von 1998 eingefroren, zurzeit [11.07.06] sind sie überhaupt nicht mehr erreichbar. Mit einigem Erstaunen stellt Oberhauser auch fest, dass - abgesehen von der fast 15 Jahre alten Untersuchung von Larsen - »keine signifikanten Studien oder Anwendungen aus dem Bibliotheksbereich vorliegen« (S. 139). Wie der Autor aber selbst ergänzend ausführt, dürfte dies daran liegen, dass sich bibliografische Metadaten wegen des geringen Textumfangs sehr schlecht für automatische Klassifikation eignen, und dass - wie frühere Ergebnisse gezeigt haben - das übliche TF/IDF-Verfahren nicht für Katalogisate geeignet ist (ibd.).

0.010133996 = product of:
  0.020267991 = sum of:
    0.020267991 = product of:
      0.040535983 = sum of:
        0.040535983 = weight(_text_:22 in 749) [ClassicSimilarity], result of:
          0.040535983 = score(doc=749,freq=2.0), product of:
            0.17461817 = queryWeight, product of:
              3.5018296 = idf(docFreq=3622, maxDocs=44218)
              0.04986484 = queryNorm
            0.23214069 = fieldWeight in 749, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              3.5018296 = idf(docFreq=3622, maxDocs=44218)
              0.046875 = fieldNorm(doc=749)
      0.5 = coord(1/2)
  0.5 = coord(1/2)

Date

25. 7.2002 21:22:31