Search (70 results, page 1 of 4)

0.13168815 = product of:
  0.2633763 = sum of:
    0.1421958 = weight(_text_:headings in 3837) [ClassicSimilarity], result of:
      0.1421958 = score(doc=3837,freq=8.0), product of:
        0.22113821 = queryWeight, product of:
          4.849944 = idf(docFreq=940, maxDocs=44218)
          0.045596033 = queryNorm
        0.6430178 = fieldWeight in 3837, product of:
          2.828427 = tf(freq=8.0), with freq of:
            8.0 = termFreq=8.0
          4.849944 = idf(docFreq=940, maxDocs=44218)
          0.046875 = fieldNorm(doc=3837)
    0.12118049 = sum of:
      0.08411469 = weight(_text_:terminology in 3837) [ClassicSimilarity], result of:
        0.08411469 = score(doc=3837,freq=2.0), product of:
          0.24053115 = queryWeight, product of:
            5.2752647 = idf(docFreq=614, maxDocs=44218)
            0.045596033 = queryNorm
          0.34970397 = fieldWeight in 3837, product of:
            1.4142135 = tf(freq=2.0), with freq of:
              2.0 = termFreq=2.0
            5.2752647 = idf(docFreq=614, maxDocs=44218)
            0.046875 = fieldNorm(doc=3837)
      0.037065797 = weight(_text_:22 in 3837) [ClassicSimilarity], result of:
        0.037065797 = score(doc=3837,freq=2.0), product of:
          0.15966953 = queryWeight, product of:
            3.5018296 = idf(docFreq=3622, maxDocs=44218)
            0.045596033 = queryNorm
          0.23214069 = fieldWeight in 3837, 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=3837)
  0.5 = coord(2/4)

Abstract

Library of Congress Subject Headings (LSCH), which celebrated its 100th birthday in 1998, is the largest cataloging and indexing language in the world for the indication of the topics and formats of books and similar publications. It consists of a controlled list of main headings, many with subdivisions, with a rich system of cross references. It is supported by the U.S. government, and undergoes systematic revision. In recent decades its managers have begun to confront challenges such as biased terminology, complicated syntax (how terms are put together to form headings), and effective displays in electronic media. Many suggestions have been made for its improvement, including moving to a fully faceted system.

Date

27. 8.2011 14:22:13

0.10810547 = product of:
  0.21621095 = sum of:
    0.1741536 = weight(_text_:headings in 5682) [ClassicSimilarity], result of:
      0.1741536 = score(doc=5682,freq=12.0), product of:
        0.22113821 = queryWeight, product of:
          4.849944 = idf(docFreq=940, maxDocs=44218)
          0.045596033 = queryNorm
        0.7875328 = fieldWeight in 5682, product of:
          3.4641016 = tf(freq=12.0), with freq of:
            12.0 = termFreq=12.0
          4.849944 = idf(docFreq=940, maxDocs=44218)
          0.046875 = fieldNorm(doc=5682)
    0.042057347 = product of:
      0.08411469 = sum of:
        0.08411469 = weight(_text_:terminology in 5682) [ClassicSimilarity], result of:
          0.08411469 = score(doc=5682,freq=2.0), product of:
            0.24053115 = queryWeight, product of:
              5.2752647 = idf(docFreq=614, maxDocs=44218)
              0.045596033 = queryNorm
            0.34970397 = fieldWeight in 5682, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              5.2752647 = idf(docFreq=614, maxDocs=44218)
              0.046875 = fieldNorm(doc=5682)
      0.5 = coord(1/2)
  0.5 = coord(2/4)

Abstract

The Library of Congress Subject Headings schema (LCSH) is the most commonly used and widely accepted subject vocabulary for general application. It is the de facto universal controlled vocabulary and has been a model for developing subject heading systems by many countries. However, LCSH's complex syntax and rules for constructing headings restrict its application by requiring highly skilled personnel and limit the effectiveness of automated authority control. Recent trends, driven to a large extent by the rapid growth of the Web, are forcing changes in bibliographic control systems to make them easier to use, understand, and apply, and subject headings are no exception. The purpose of adapting the LCSH with a simplified syntax to create FAST (Faceted Application of Subject Terminology) headings is to retain the very rich vocabulary of LCSH while making the schema easier to understand, control, apply, and use. The schema maintains compatibility with LCSH--any valid Library of Congress subject heading can be converted to FAST headings.

0.107481 = product of:
  0.214962 = sum of:
    0.1658951 = weight(_text_:headings in 1177) [ClassicSimilarity], result of:
      0.1658951 = score(doc=1177,freq=8.0), product of:
        0.22113821 = queryWeight, product of:
          4.849944 = idf(docFreq=940, maxDocs=44218)
          0.045596033 = queryNorm
        0.75018746 = fieldWeight in 1177, product of:
          2.828427 = tf(freq=8.0), with freq of:
            8.0 = termFreq=8.0
          4.849944 = idf(docFreq=940, maxDocs=44218)
          0.0546875 = fieldNorm(doc=1177)
    0.049066905 = product of:
      0.09813381 = sum of:
        0.09813381 = weight(_text_:terminology in 1177) [ClassicSimilarity], result of:
          0.09813381 = score(doc=1177,freq=2.0), product of:
            0.24053115 = queryWeight, product of:
              5.2752647 = idf(docFreq=614, maxDocs=44218)
              0.045596033 = queryNorm
            0.40798795 = fieldWeight in 1177, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              5.2752647 = idf(docFreq=614, maxDocs=44218)
              0.0546875 = fieldNorm(doc=1177)
      0.5 = coord(1/2)
  0.5 = coord(2/4)

Abstract

The Michigan State University Libraries (MSUL) digital repository contains numerous collections of openly available material. Since 2016, the digital repository has been using Faceted Application of Subject Terminology (FAST) subject headings as its primary subject vocabulary in order to streamline faceting, display, and search. The MSUL FAST use case presents some challenges that are not addressed by existing MARC-focused FAST tools. This paper will outline the MSUL digital repository team's justification for including FAST headings in the digital repository as well as workflows for adding FAST headings to Metadata Object Description Schema (MODS) metadata, their maintenance, and utilization for discovery.

0.09636814 = product of:
  0.19273628 = sum of:
    0.14366938 = weight(_text_:headings in 1176) [ClassicSimilarity], result of:
      0.14366938 = score(doc=1176,freq=6.0), product of:
        0.22113821 = queryWeight, product of:
          4.849944 = idf(docFreq=940, maxDocs=44218)
          0.045596033 = queryNorm
        0.6496814 = fieldWeight in 1176, product of:
          2.4494898 = tf(freq=6.0), with freq of:
            6.0 = termFreq=6.0
          4.849944 = idf(docFreq=940, maxDocs=44218)
          0.0546875 = fieldNorm(doc=1176)
    0.049066905 = product of:
      0.09813381 = sum of:
        0.09813381 = weight(_text_:terminology in 1176) [ClassicSimilarity], result of:
          0.09813381 = score(doc=1176,freq=2.0), product of:
            0.24053115 = queryWeight, product of:
              5.2752647 = idf(docFreq=614, maxDocs=44218)
              0.045596033 = queryNorm
            0.40798795 = fieldWeight in 1176, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              5.2752647 = idf(docFreq=614, maxDocs=44218)
              0.0546875 = fieldNorm(doc=1176)
      0.5 = coord(1/2)
  0.5 = coord(2/4)

Abstract

Digital repository migrations present a periodic opportunity to assess metadata quality and to perform strategic enhancements. Lafayette College Libraries implemented OCLC FAST (Faceted Application of Subject Terminology) for its digital image collections as part of a migration from multiple repositories to a single one built on the Samvera Hyrax open-source framework. Application of FAST has normalized subject headings across dissimilar collections in a way that tremendously improves descriptive consistency for staff and discoverability for end users. However, the process of applying FAST headings was complicated by several features of in-scope metadata as well as gaps in available controlled subject authorities.

0.082601264 = product of:
  0.16520253 = sum of:
    0.12314518 = weight(_text_:headings in 2181) [ClassicSimilarity], result of:
      0.12314518 = score(doc=2181,freq=6.0), product of:
        0.22113821 = queryWeight, product of:
          4.849944 = idf(docFreq=940, maxDocs=44218)
          0.045596033 = queryNorm
        0.55686975 = fieldWeight in 2181, product of:
          2.4494898 = tf(freq=6.0), with freq of:
            6.0 = termFreq=6.0
          4.849944 = idf(docFreq=940, maxDocs=44218)
          0.046875 = fieldNorm(doc=2181)
    0.042057347 = product of:
      0.08411469 = sum of:
        0.08411469 = weight(_text_:terminology in 2181) [ClassicSimilarity], result of:
          0.08411469 = score(doc=2181,freq=2.0), product of:
            0.24053115 = queryWeight, product of:
              5.2752647 = idf(docFreq=614, maxDocs=44218)
              0.045596033 = queryNorm
            0.34970397 = fieldWeight in 2181, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              5.2752647 = idf(docFreq=614, maxDocs=44218)
              0.046875 = fieldNorm(doc=2181)
      0.5 = coord(1/2)
  0.5 = coord(2/4)

Abstract

Recent trends, driven to a large extent by the rapid proliferation of digital resources, are forcing changes in bibliographic control to make it easier to use, understand, and apply subject data. Subject headings are no exception. The enormous volume and rapid growth of digital libraries and repositories and the emergence of numerous metadata schemes have spurred a reexamination of the way subject data are to be provided for such resources efficiently and effectively. To address this need, OCLC in cooperation with the Library of Congress, has taken a new approach, called FAST (Faceted Application of Subject Terminology). FAST headings are based on the existing vocabulary in Library of Congress Subject Headings (LCSH), but are applied with a simpler syntax than required by Library of Congress application policies. Adapting the LCSH vocabulary in a simplified faceted syntax retains the rich vocabulary of LCSH while making it easier to understand, control, apply, and use.

0.07130248 = product of:
  0.14260496 = sum of:
    0.10054762 = weight(_text_:headings in 791) [ClassicSimilarity], result of:
      0.10054762 = score(doc=791,freq=4.0), product of:
        0.22113821 = queryWeight, product of:
          4.849944 = idf(docFreq=940, maxDocs=44218)
          0.045596033 = queryNorm
        0.45468226 = fieldWeight in 791, product of:
          2.0 = tf(freq=4.0), with freq of:
            4.0 = termFreq=4.0
          4.849944 = idf(docFreq=940, maxDocs=44218)
          0.046875 = fieldNorm(doc=791)
    0.042057347 = product of:
      0.08411469 = sum of:
        0.08411469 = weight(_text_:terminology in 791) [ClassicSimilarity], result of:
          0.08411469 = score(doc=791,freq=2.0), product of:
            0.24053115 = queryWeight, product of:
              5.2752647 = idf(docFreq=614, maxDocs=44218)
              0.045596033 = queryNorm
            0.34970397 = fieldWeight in 791, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              5.2752647 = idf(docFreq=614, maxDocs=44218)
              0.046875 = fieldNorm(doc=791)
      0.5 = coord(1/2)
  0.5 = coord(2/4)

Abstract

The Subject Analysis Committee Subcommittee on FAST of the Association for Library Collections & Technical Services (ALCTS) was established in the fall of 2004 to explore issues related to the implementation of the Faceted Application of Subject Terminology (FAST) subject heading schema. FAST is being developed at the Online Computer Library Center (OCLC) and is derived from the Library of Congress Subject Headings (LCSH) with a simplified syntax. This paper is based on comments by the Subject Analysis Committee Subcommittee on FAST, which reviewed a sample of 5,000 bibliographic records with both LCSH and FAST headings. It provides the library community with some understanding of FAST, a new system of subject cataloging and metadata.

0.07130248 = product of:
  0.14260496 = sum of:
    0.10054762 = weight(_text_:headings in 310) [ClassicSimilarity], result of:
      0.10054762 = score(doc=310,freq=4.0), product of:
        0.22113821 = queryWeight, product of:
          4.849944 = idf(docFreq=940, maxDocs=44218)
          0.045596033 = queryNorm
        0.45468226 = fieldWeight in 310, product of:
          2.0 = tf(freq=4.0), with freq of:
            4.0 = termFreq=4.0
          4.849944 = idf(docFreq=940, maxDocs=44218)
          0.046875 = fieldNorm(doc=310)
    0.042057347 = product of:
      0.08411469 = sum of:
        0.08411469 = weight(_text_:terminology in 310) [ClassicSimilarity], result of:
          0.08411469 = score(doc=310,freq=2.0), product of:
            0.24053115 = queryWeight, product of:
              5.2752647 = idf(docFreq=614, maxDocs=44218)
              0.045596033 = queryNorm
            0.34970397 = fieldWeight in 310, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              5.2752647 = idf(docFreq=614, maxDocs=44218)
              0.046875 = fieldNorm(doc=310)
      0.5 = coord(1/2)
  0.5 = coord(2/4)

Abstract

Authority files have played an important role in improving the quality of indexing and subject cataloging. Although authorities can significantly improve search by increasing the number of access points, they are rarely an integral part of the information retrieval process, particularly end-users searches. A retrieval prototype, searchFAST, was developed to test the feasibility of using an authority file as an index to bibliographic records. searchFAST uses FAST (Faceted Application of Subject Terminology) as an index to OCLC's WorldCat.org bibliographic database. The searchFAST methodology complements, rather than replaces, existing WorldCat.org access. The bibliographic file is searched indirectly; first the authority file is searched to identify appropriate subject headings, then the headings are used to retrieve the matching bibliographic records. The prototype demonstrates the effectiveness and practicality of using an authority file as an index. Searching the authority file leverages authority control work by increasing the number of access points while supporting a simple interface designed for end-users.

0.06703175 = product of:
  0.268127 = sum of:
    0.268127 = weight(_text_:headings in 2843) [ClassicSimilarity], result of:
      0.268127 = score(doc=2843,freq=4.0), product of:
        0.22113821 = queryWeight, product of:
          4.849944 = idf(docFreq=940, maxDocs=44218)
          0.045596033 = queryNorm
        1.212486 = fieldWeight in 2843, product of:
          2.0 = tf(freq=4.0), with freq of:
            4.0 = termFreq=4.0
          4.849944 = idf(docFreq=940, maxDocs=44218)
          0.125 = fieldNorm(doc=2843)
  0.25 = coord(1/4)

0.059540257 = product of:
  0.11908051 = sum of:
    0.10054762 = weight(_text_:headings in 5920) [ClassicSimilarity], result of:
      0.10054762 = score(doc=5920,freq=4.0), product of:
        0.22113821 = queryWeight, product of:
          4.849944 = idf(docFreq=940, maxDocs=44218)
          0.045596033 = queryNorm
        0.45468226 = fieldWeight in 5920, product of:
          2.0 = tf(freq=4.0), with freq of:
            4.0 = termFreq=4.0
          4.849944 = idf(docFreq=940, maxDocs=44218)
          0.046875 = fieldNorm(doc=5920)
    0.018532898 = product of:
      0.037065797 = sum of:
        0.037065797 = weight(_text_:22 in 5920) [ClassicSimilarity], result of:
          0.037065797 = score(doc=5920,freq=2.0), product of:
            0.15966953 = queryWeight, product of:
              3.5018296 = idf(docFreq=3622, maxDocs=44218)
              0.045596033 = queryNorm
            0.23214069 = fieldWeight in 5920, 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=5920)
      0.5 = coord(1/2)
  0.5 = coord(2/4)

Abstract

Library of Congress Subject Headings (LCSH), a system originally designed as a tool for subject access to the Library's own collection in the late nineteenth century, has become, in the course of the last century, the main subject retrieval tool in library catalogs throughout the United States and in many other countries. It is one of the largest non-specialized controlled vocabularies in the world. As LCSH enters a new century, it faces an information environment that has undergone vast changes from what had prevailed when LCSH began, or, indeed, from its state in the early days of the online age. In order to continue its mission and to be useful in spheres outside library catalogs as well, LCSH must adapt to the multifarious environment. One possible approach is to adopt a series of scalable and flexible syntax and application rules to meet the needs of different user communities

Date

27. 5.2001 16:22:21

Source

The LCSH century: one hundred years with the Library of Congress Subject Headings system. Ed.: A.T.Stone

0.059418738 = product of:
  0.118837476 = sum of:
    0.083789684 = weight(_text_:headings in 1970) [ClassicSimilarity], result of:
      0.083789684 = score(doc=1970,freq=4.0), product of:
        0.22113821 = queryWeight, product of:
          4.849944 = idf(docFreq=940, maxDocs=44218)
          0.045596033 = queryNorm
        0.3789019 = fieldWeight in 1970, product of:
          2.0 = tf(freq=4.0), with freq of:
            4.0 = termFreq=4.0
          4.849944 = idf(docFreq=940, maxDocs=44218)
          0.0390625 = fieldNorm(doc=1970)
    0.03504779 = product of:
      0.07009558 = sum of:
        0.07009558 = weight(_text_:terminology in 1970) [ClassicSimilarity], result of:
          0.07009558 = score(doc=1970,freq=2.0), product of:
            0.24053115 = queryWeight, product of:
              5.2752647 = idf(docFreq=614, maxDocs=44218)
              0.045596033 = queryNorm
            0.29141995 = fieldWeight in 1970, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              5.2752647 = idf(docFreq=614, maxDocs=44218)
              0.0390625 = fieldNorm(doc=1970)
      0.5 = coord(1/2)
  0.5 = coord(2/4)

Abstract

Authority files have played an important role in improving the quality of indexing and subject cataloging. Although authorities can significantly improve searching by increasing the number of access points, they are rarely an integral part of the information retrieval process, particularly end-users' searches. A retrieval prototype, searchFAST, was developed to test the feasibility of using an authority file as an index to bibliographic records. searchFAST uses Faceted Application of Subject Terminology (FAST) as an index to OCLC's WorldCat.org bibliographic database. The searchFAST prototype complements, rather than replaces, existing WorldCat.org access. The bibliographic file is searched indirectly; first the authority file is searched to identify appropriate subject headings, then the headings are used to retrieve the matching bibliographic records. The prototype demonstrates the effectiveness and practicality of using an authority file as an index. Searching the authority file leverages authority control work by increasing the number of access points while supporting a simple interface designed for end-users.

0.056577623 = product of:
  0.113155246 = sum of:
    0.0710979 = weight(_text_:headings in 5674) [ClassicSimilarity], result of:
      0.0710979 = score(doc=5674,freq=2.0), product of:
        0.22113821 = queryWeight, product of:
          4.849944 = idf(docFreq=940, maxDocs=44218)
          0.045596033 = queryNorm
        0.3215089 = fieldWeight in 5674, product of:
          1.4142135 = tf(freq=2.0), with freq of:
            2.0 = termFreq=2.0
          4.849944 = idf(docFreq=940, maxDocs=44218)
          0.046875 = fieldNorm(doc=5674)
    0.042057347 = product of:
      0.08411469 = sum of:
        0.08411469 = weight(_text_:terminology in 5674) [ClassicSimilarity], result of:
          0.08411469 = score(doc=5674,freq=2.0), product of:
            0.24053115 = queryWeight, product of:
              5.2752647 = idf(docFreq=614, maxDocs=44218)
              0.045596033 = queryNorm
            0.34970397 = fieldWeight in 5674, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              5.2752647 = idf(docFreq=614, maxDocs=44218)
              0.046875 = fieldNorm(doc=5674)
      0.5 = coord(1/2)
  0.5 = coord(2/4)

Abstract

The project of the renewal of the Subject Headings for Italian Library Catalogues (Soggettario), financed by the National Central Library in Florence, proposes a pre-coordinated language, both analytic and synthetic, complying with international rules on vocabulary control and structure, based on category analysis of semantic relationships. It envisages a strict distinction between semantic relationships and syntactic ones, and bases its citation order of subject strings on the analysis model for logical relationships. Thanks to its features, the new Soggettario agrees both with the logic of Guidelines for Subject Authority and Reference Entries and of UNIMARC. Authorities, and with FRBR (Functional Requirements for Bibliographic Records). The rigorous structure of the thesaurus will facilitate the transfer of controlled terminology to lists or authority files and archives. The Italian National Bibliography (BNI) will have to play a leading role on the control of coherence of semantic access points. It will validate the strings created by other libraries and control their coherence according to the syntax rules envisaged in the new method.

0.0507948 = product of:
  0.2031792 = sum of:
    0.2031792 = weight(_text_:headings in 1446) [ClassicSimilarity], result of:
      0.2031792 = score(doc=1446,freq=12.0), product of:
        0.22113821 = queryWeight, product of:
          4.849944 = idf(docFreq=940, maxDocs=44218)
          0.045596033 = queryNorm
        0.91878825 = fieldWeight in 1446, product of:
          3.4641016 = tf(freq=12.0), with freq of:
            12.0 = termFreq=12.0
          4.849944 = idf(docFreq=940, maxDocs=44218)
          0.0546875 = fieldNorm(doc=1446)
  0.25 = coord(1/4)

Abstract

A recent survey at the Royal Library in the Netherlands showed that subject headings are more efficient than title keywords for retrieval purposes. 475 Dutch publications were selected at random and assigned subject headings. The study showed that subject headings provided additional useful information in 56% of titles. Subsequent searching of the library's online catalogue showed that 88% of titles were retrieved via subject headings against 57% through title keywords. Further precision may be achieved with the help of indexing staff, but at considerable cost

Footnote

Übers. d. Titels: A good title has no need of subject headings, or does it?: a comparative study of title keywords against subject headings

0.047148023 = product of:
  0.094296046 = sum of:
    0.059248257 = weight(_text_:headings in 2703) [ClassicSimilarity], result of:
      0.059248257 = score(doc=2703,freq=2.0), product of:
        0.22113821 = queryWeight, product of:
          4.849944 = idf(docFreq=940, maxDocs=44218)
          0.045596033 = queryNorm
        0.2679241 = fieldWeight in 2703, product of:
          1.4142135 = tf(freq=2.0), with freq of:
            2.0 = termFreq=2.0
          4.849944 = idf(docFreq=940, maxDocs=44218)
          0.0390625 = fieldNorm(doc=2703)
    0.03504779 = product of:
      0.07009558 = sum of:
        0.07009558 = weight(_text_:terminology in 2703) [ClassicSimilarity], result of:
          0.07009558 = score(doc=2703,freq=2.0), product of:
            0.24053115 = queryWeight, product of:
              5.2752647 = idf(docFreq=614, maxDocs=44218)
              0.045596033 = queryNorm
            0.29141995 = fieldWeight in 2703, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              5.2752647 = idf(docFreq=614, maxDocs=44218)
              0.0390625 = fieldNorm(doc=2703)
      0.5 = coord(1/2)
  0.5 = coord(2/4)

Abstract

When consumers search for health information, a major obstacle is their unfamiliarity with the medical terminology. Even though medical thesauri such as the Medical Subject Headings (MeSH) and related tools (e.g., the MeSH Browser) were created to help consumers find medical term definitions, the lack of direct and explicit integration of these help tools into a health retrieval system prevented them from effectively achieving their objectives. To explore this issue, we conducted an empirical study with two systems: One is a simple interface system supporting query-based searching; the other is an augmented system with two new components supporting MeSH term searching and MeSH tree browsing. A total of 45 subjects were recruited to participate in the study. The results indicated that the augmented system is more effective than the simple system in terms of improving user-perceived topic familiarity and question-answer performance, even though we did not find users spend more time on the augmented system. The two new MeSH help components played a critical role in participants' health information retrieval and were found to allow them to develop new search strategies. The findings of the study enhanced our understanding of consumers' search behaviors and shed light on the design of future health information retrieval systems.

0.047148023 = product of:
  0.094296046 = sum of:
    0.059248257 = weight(_text_:headings in 4307) [ClassicSimilarity], result of:
      0.059248257 = score(doc=4307,freq=2.0), product of:
        0.22113821 = queryWeight, product of:
          4.849944 = idf(docFreq=940, maxDocs=44218)
          0.045596033 = queryNorm
        0.2679241 = fieldWeight in 4307, product of:
          1.4142135 = tf(freq=2.0), with freq of:
            2.0 = termFreq=2.0
          4.849944 = idf(docFreq=940, maxDocs=44218)
          0.0390625 = fieldNorm(doc=4307)
    0.03504779 = product of:
      0.07009558 = sum of:
        0.07009558 = weight(_text_:terminology in 4307) [ClassicSimilarity], result of:
          0.07009558 = score(doc=4307,freq=2.0), product of:
            0.24053115 = queryWeight, product of:
              5.2752647 = idf(docFreq=614, maxDocs=44218)
              0.045596033 = queryNorm
            0.29141995 = fieldWeight in 4307, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              5.2752647 = idf(docFreq=614, maxDocs=44218)
              0.0390625 = fieldNorm(doc=4307)
      0.5 = coord(1/2)
  0.5 = coord(2/4)

Abstract

The construction and updating of indexing languages depend on the organization of their hierarchical structures in order to determine the classification of related terms and, above all, to allow a constant updating of vocabulary, a condition for knowledge evolution. The elaboration of an indexing language for online catalogs of libraries' networks is important considering the diversity and specificity of knowledge areas. From this perspective, the present paper reports on the work of a team of catalogers and researchers engaged in the construction of a hierarchical structure of an indexing language for an online catalog of a university library's network. The work on hierarchical structures began by defining the categories and subcategories that form the indexing language macrostructure by using the parameters of the Library of Congress Subject Headings , the National Library Terminology and the Vocabulary of the University of São Paulo Library's system. Throughout the stages of the elaboration process of the macrostructure, difficulties and improvements were observed and discussed. The results enabled the assessment of the hierarchical structures of the languages used in the organization of the superordinate and subordinate terms, which has contributed to the systematization of operational procedures contained in an indexing language manual for online catalogs of libraries.

0.047026847 = product of:
  0.18810739 = sum of:
    0.18810739 = weight(_text_:headings in 5612) [ClassicSimilarity], result of:
      0.18810739 = score(doc=5612,freq=14.0), product of:
        0.22113821 = queryWeight, product of:
          4.849944 = idf(docFreq=940, maxDocs=44218)
          0.045596033 = queryNorm
        0.85063267 = fieldWeight in 5612, product of:
          3.7416575 = tf(freq=14.0), with freq of:
            14.0 = termFreq=14.0
          4.849944 = idf(docFreq=940, maxDocs=44218)
          0.046875 = fieldNorm(doc=5612)
  0.25 = coord(1/4)

Abstract

Library of Congress Subjecl Headings retrieved as the results of a search in an online catalog are likely to be filed in straight alphabetical, word-by-word order, ignoring the semantic structures of these headings and scattering headings of a similar type. This practice makes LC headings unnecessarily difficult to use and negates much of their indexing power. Enthusiasm for filing simplicity and postcoordinate indexing are likely contributing factors to this phenomenon. Since the report Headings for Tomorrow (1992) first raised this issue, filing practices favoring postcoordination over precoordination appear to have become more widespread and more entrenched

Source

The LCSH century: one hundred years with the Library of Congress Subject Headings system. Ed.: A.T. Stone

0.0448154 = product of:
  0.0896308 = sum of:
    0.0710979 = weight(_text_:headings in 131) [ClassicSimilarity], result of:
      0.0710979 = score(doc=131,freq=2.0), product of:
        0.22113821 = queryWeight, product of:
          4.849944 = idf(docFreq=940, maxDocs=44218)
          0.045596033 = queryNorm
        0.3215089 = fieldWeight in 131, product of:
          1.4142135 = tf(freq=2.0), with freq of:
            2.0 = termFreq=2.0
          4.849944 = idf(docFreq=940, maxDocs=44218)
          0.046875 = fieldNorm(doc=131)
    0.018532898 = product of:
      0.037065797 = sum of:
        0.037065797 = weight(_text_:22 in 131) [ClassicSimilarity], result of:
          0.037065797 = score(doc=131,freq=2.0), product of:
            0.15966953 = queryWeight, product of:
              3.5018296 = idf(docFreq=3622, maxDocs=44218)
              0.045596033 = queryNorm
            0.23214069 = fieldWeight in 131, 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=131)
      0.5 = coord(1/2)
  0.5 = coord(2/4)

Abstract

After a fundamental examination of the phenomenon of time, this paper presents the history, authority, and structure of period subdivisions and chronological terms in the three subject heading languages LCSH (Library of Congress Subject Headings), RAMEAU (Répertoire d'Autorité Matière Encyclopédique et Alphabétique Unifié), and RSWK (Regeln für den Schlagwortkatalog). Their usefulness in online searching is demonstrated using the online catalogs of the Library of Congress, the Bibliothèque nationale de France, and the Deutsche Bibliothek and is compared to the search options in selected digital encyclopedias (Encyclopaedia Britannica, Encarta, Brockhaus-Enzyklopädie). The author develops a model for common time retrieval across all three online catalogs, outlines the conditions for that model (time period code, chronological code, and chronology authority file), and proposes a search interface.

Date

10. 9.2000 17:38:22

0.041894842 = product of:
  0.16757937 = sum of:
    0.16757937 = weight(_text_:headings in 4593) [ClassicSimilarity], result of:
      0.16757937 = score(doc=4593,freq=4.0), product of:
        0.22113821 = queryWeight, product of:
          4.849944 = idf(docFreq=940, maxDocs=44218)
          0.045596033 = queryNorm
        0.7578038 = fieldWeight in 4593, product of:
          2.0 = tf(freq=4.0), with freq of:
            4.0 = termFreq=4.0
          4.849944 = idf(docFreq=940, maxDocs=44218)
          0.078125 = fieldNorm(doc=4593)
  0.25 = coord(1/4)

LCSH

Subject headings

Subject

Subject headings

0.041473776 = product of:
  0.1658951 = sum of:
    0.1658951 = weight(_text_:headings in 2841) [ClassicSimilarity], result of:
      0.1658951 = score(doc=2841,freq=2.0), product of:
        0.22113821 = queryWeight, product of:
          4.849944 = idf(docFreq=940, maxDocs=44218)
          0.045596033 = queryNorm
        0.75018746 = fieldWeight in 2841, product of:
          1.4142135 = tf(freq=2.0), with freq of:
            2.0 = termFreq=2.0
          4.849944 = idf(docFreq=940, maxDocs=44218)
          0.109375 = fieldNorm(doc=2841)
  0.25 = coord(1/4)

0.041473776 = product of:
  0.1658951 = sum of:
    0.1658951 = weight(_text_:headings in 2902) [ClassicSimilarity], result of:
      0.1658951 = score(doc=2902,freq=2.0), product of:
        0.22113821 = queryWeight, product of:
          4.849944 = idf(docFreq=940, maxDocs=44218)
          0.045596033 = queryNorm
        0.75018746 = fieldWeight in 2902, product of:
          1.4142135 = tf(freq=2.0), with freq of:
            2.0 = termFreq=2.0
          4.849944 = idf(docFreq=940, maxDocs=44218)
          0.109375 = fieldNorm(doc=2902)
  0.25 = coord(1/4)

0.041473776 = product of:
  0.1658951 = sum of:
    0.1658951 = weight(_text_:headings in 6167) [ClassicSimilarity], result of:
      0.1658951 = score(doc=6167,freq=2.0), product of:
        0.22113821 = queryWeight, product of:
          4.849944 = idf(docFreq=940, maxDocs=44218)
          0.045596033 = queryNorm
        0.75018746 = fieldWeight in 6167, product of:
          1.4142135 = tf(freq=2.0), with freq of:
            2.0 = termFreq=2.0
          4.849944 = idf(docFreq=940, maxDocs=44218)
          0.109375 = fieldNorm(doc=6167)
  0.25 = coord(1/4)