Search (66 results, page 2 of 4)

0.037643716 = product of:
  0.07528743 = sum of:
    0.07528743 = product of:
      0.15057486 = sum of:
        0.15057486 = weight(_text_:headings in 6579) [ClassicSimilarity], result of:
          0.15057486 = score(doc=6579,freq=4.0), product of:
            0.24837378 = queryWeight, product of:
              4.849944 = idf(docFreq=940, maxDocs=44218)
              0.051211677 = queryNorm
            0.606243 = fieldWeight in 6579, product of:
              2.0 = tf(freq=4.0), with freq of:
                4.0 = termFreq=4.0
              4.849944 = idf(docFreq=940, maxDocs=44218)
              0.0625 = fieldNorm(doc=6579)
      0.5 = coord(1/2)
  0.5 = coord(1/2)

Abstract

Considers the future of LCSH and whether their viability can be maintained through a written standardization code. Until there is an online substitute for LC subject headings which has been tested on a large scale over a period of time, a successor to the present combination of LC's controlled vocabulary headings plus computerized techniques such as keyword searching is unlikely to emerge

0.037643716 = product of:
  0.07528743 = sum of:
    0.07528743 = product of:
      0.15057486 = sum of:
        0.15057486 = weight(_text_:headings in 1224) [ClassicSimilarity], result of:
          0.15057486 = score(doc=1224,freq=16.0), product of:
            0.24837378 = queryWeight, product of:
              4.849944 = idf(docFreq=940, maxDocs=44218)
              0.051211677 = queryNorm
            0.606243 = fieldWeight in 1224, product of:
              4.0 = tf(freq=16.0), with freq of:
                16.0 = termFreq=16.0
              4.849944 = idf(docFreq=940, maxDocs=44218)
              0.03125 = fieldNorm(doc=1224)
      0.5 = coord(1/2)
  0.5 = coord(1/2)

Content

Enthält die Beiträge: BACKGROUND: Alva T STONE: The LCSH Century: A Brief History of the Library of Congress Subject Headings, and Introduction to the Centennial Essays - THEORY AND PRINCIPLES: Elaine SVENONIUS: LCSH: Semantics, Syntax and Specificity; Heidi Lee HOERMAN u. Kevin A. FURNISS: Turning Practice into Principles: A Comparison of the IFLA: Principles Underlying Subject Heading Languages (SHLs) and the Principles Underlying the Library of Congress Subject Headings System; Hope A. OLSON: Difference, Culture and Change:The Untapped Potential of LCSH - ONLINE ENVIRONMENT: Pauline Atherton COCHRANE: Improving LCSH for Use in Online Catalogs Revisited-What Progress Has Been Made? What Issues Still Remain?; Gregory WOOL: Filing and Precoordination: How Subject Headings Are Displayed in Online Catalogs and Why It Matters; Stephen HEARN: Machine-Assisted Validation of LC Subject Headings: Implications for Authority File Structure - SPECIFIC PERSPECTIVES: Thomas MANN: Teaching Library of Congress Subject Headings; Louisa J. KREIDER: LCSH Works! Subject Searching Effectiveness at the Cleveland Public Library and the Growth of Library of Congress Subject Headings Through Cooperation; Harriette HEMMASI u J. Bradford YOUNG: LCSH for Music: Historical and Empirical Perspectives; Joseph MILLER u. Patricia KUHR: LCSH and Periodical Indexing: Adoption vs. Adaptation; David P MILLER: Out from Under: Form/Genre Access in LCSH - WORLD VIEW: Magda HEINER-FREILING: Survey on Subject Heading Languages Used in National Libraries and Bibliographies; Andrew MacEWAN: Crossing Language Barriers in Europe: Linking LCSH to Other Subject Heading Languages; Alvaro QUIJANO-SOLIS u.a.: Automated Authority Files of Spanish-Language Subject Headings - FUTURE PROSPECTS: Lois Mai CHAN u. Theodora HODGES: Entering the Millennium: a new century for LCSH

0.037199963 = product of:
  0.074399926 = sum of:
    0.074399926 = product of:
      0.14879985 = sum of:
        0.14879985 = weight(_text_:headings in 2549) [ClassicSimilarity], result of:
          0.14879985 = score(doc=2549,freq=10.0), product of:
            0.24837378 = queryWeight, product of:
              4.849944 = idf(docFreq=940, maxDocs=44218)
              0.051211677 = queryNorm
            0.5990965 = fieldWeight in 2549, product of:
              3.1622777 = tf(freq=10.0), with freq of:
                10.0 = termFreq=10.0
              4.849944 = idf(docFreq=940, maxDocs=44218)
              0.0390625 = fieldNorm(doc=2549)
      0.5 = coord(1/2)
  0.5 = coord(1/2)

Abstract

Purpose - This paper aims at providing a robust, user-friendly and efficient navigation procedure in an online library catalog that is based on semantic information encapsulated within subject headings. Design/methodology/approach - The paper describes an interactive navigation procedure inside an online library catalog based on semantic information. The proposed approach is presented through a web-based, prototype application following the most recent trends of the semantic web such as AJAX technology and the web ontology language - OWL for encoding semantics. Findings - According to the proposed method, a GUI interface exposes the hierarchy of the subject headings employed within an OPAC, as well as all stated relations between such headings, as links that the user can follow, effectively traversing the ontology and formulating at the same time the actual query to the underlying OPAC. This act of interactive navigation through the library's assets aids searchers in accurately formulating their queries, by offering broader or narrower concepts for selection or indicating alternative or related concepts they might be initially unaware of. The augmented exposition of inter-relations between concepts provides multiple paths for information retrieval and enables searchers to fulfill their information needs in a faster, more efficient and intuitive manner. Practical implications - The paper includes implications for the development of modern, semantic web applications focused on the library domain. The novel approach of visualizing subject headings could be further extended to visualize a number of other conceptualizations of the library domain. Originality/value - This paper fulfils an identified need to take advantage of the "hidden knowledge" existing within the library domain but, for a number of reasons, is never exposed to the library users.

0.035212472 = product of:
  0.070424944 = sum of:
    0.070424944 = product of:
      0.14084989 = sum of:
        0.14084989 = weight(_text_:headings in 3966) [ClassicSimilarity], result of:
          0.14084989 = score(doc=3966,freq=14.0), product of:
            0.24837378 = queryWeight, product of:
              4.849944 = idf(docFreq=940, maxDocs=44218)
              0.051211677 = queryNorm
            0.5670884 = fieldWeight in 3966, product of:
              3.7416575 = tf(freq=14.0), with freq of:
                14.0 = termFreq=14.0
              4.849944 = idf(docFreq=940, maxDocs=44218)
              0.03125 = fieldNorm(doc=3966)
      0.5 = coord(1/2)
  0.5 = coord(1/2)

Abstract

Organizing and providing access to the resources an the Internet has been a problem area in spite of the availability of sophisticated search engines and other Software tools. There have been several attempts to organize the resources an the WWW. Some of them have tried to use traditional library classification schemes such as the Library of Congress Classification, the Dewey Decimal Classification and others. However there is a need to assign proper subject headings to them and present them in a logical or hierarchical sequence to cater to the need for browsing. This paper attempts to describe an experimental system designed to organize and provide access to web documents using a faceted pre-coordinate indexing system based an the Deep Structure Indexing System (DSIS) derived from POPSI (Postulate based Permuted Subject Indexing) of Bhattacharyya, and the facet analysis and chain indexing System of Ranganathan. A prototype software system has been designed to create a database of records specifying Web documents according to the Dublin Core and input a faceted subject heading according to DSIS. Synonymous terms are added to the standard terms in the heading using appropriate symbols. Once the data are entered along with a description and URL of the Web document, the record is stored in the system. More than one faceted subject heading can be assigned to a record depending an the content of the original document. The system stores the surrogates and keeps the faceted subject headings separately after establishing a link. Search is carried out an index entries derived from the faceted subject heading using chain indexing technique. If a single term is input, the system searches for its presence in the faceted subject headings and displays the subject headings in a sorted sequence reflecting an organizing sequence. If the number of retrieved headings is too large (running into more than a page) then the user has the option of entering another search term to be searched in combination. The system searches subject headings already retrieved and look for those containing the second term. The retrieved faceted subject headings can be displayed and browsed. When the relevant subject heading is selected the system displays the records with their URLs. Using the URL the original document an the web can be accessed. The prototype system developed under Windows NT environment using ASP and web server is under rigorous testing. The database and indexes management routines need further development.

0.034577962 = product of:
  0.069155924 = sum of:
    0.069155924 = product of:
      0.13831185 = sum of:
        0.13831185 = weight(_text_:headings in 386) [ClassicSimilarity], result of:
          0.13831185 = score(doc=386,freq=6.0), product of:
            0.24837378 = queryWeight, product of:
              4.849944 = idf(docFreq=940, maxDocs=44218)
              0.051211677 = queryNorm
            0.55686975 = fieldWeight in 386, 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=386)
      0.5 = coord(1/2)
  0.5 = coord(1/2)

Abstract

Using subject headings for Online Retrieval is an indispensable tool for online system desingners who are developing new systems or refining exicting ones. The book describes subject analysis and subject searching in online catalogs, including the limitations of retrieval, and demonstrates how such limitations can be overcome through system design and programming. The book describes the Library of Congress Subject headings system and system characteristics, shows how information is stored in machine readable files, and offers examples of and recommendations for successful methods. Tables are included to support these recommendations, and diagrams, graphs, and bar charts are used to provide results of data analyses.

0.034577962 = product of:
  0.069155924 = sum of:
    0.069155924 = product of:
      0.13831185 = sum of:
        0.13831185 = weight(_text_:headings in 2181) [ClassicSimilarity], result of:
          0.13831185 = score(doc=2181,freq=6.0), product of:
            0.24837378 = queryWeight, product of:
              4.849944 = idf(docFreq=940, maxDocs=44218)
              0.051211677 = 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)
      0.5 = coord(1/2)
  0.5 = coord(1/2)

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.

0.03327266 = product of:
  0.06654532 = sum of:
    0.06654532 = product of:
      0.13309065 = sum of:
        0.13309065 = weight(_text_:headings in 2459) [ClassicSimilarity], result of:
          0.13309065 = score(doc=2459,freq=2.0), product of:
            0.24837378 = queryWeight, product of:
              4.849944 = idf(docFreq=940, maxDocs=44218)
              0.051211677 = queryNorm
            0.5358482 = fieldWeight in 2459, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              4.849944 = idf(docFreq=940, maxDocs=44218)
              0.078125 = fieldNorm(doc=2459)
      0.5 = coord(1/2)
  0.5 = coord(1/2)

0.03293825 = product of:
  0.0658765 = sum of:
    0.0658765 = product of:
      0.131753 = sum of:
        0.131753 = weight(_text_:headings in 2775) [ClassicSimilarity], result of:
          0.131753 = score(doc=2775,freq=4.0), product of:
            0.24837378 = queryWeight, product of:
              4.849944 = idf(docFreq=940, maxDocs=44218)
              0.051211677 = queryNorm
            0.5304626 = fieldWeight in 2775, product of:
              2.0 = tf(freq=4.0), with freq of:
                4.0 = termFreq=4.0
              4.849944 = idf(docFreq=940, maxDocs=44218)
              0.0546875 = fieldNorm(doc=2775)
      0.5 = coord(1/2)
  0.5 = coord(1/2)

Abstract

Browse searching of online catalogs and electronic indexes is a popular means of retrieving information, but some subject heading lists are so extensive that browsing them can be difficult and time-consuming. This resaerch tested one way of presenting a browse interface to reduce the amount of scanning of subject headings required. It found that a hierarchical presentation of headings reduced the amount of scanning required by more than 50% without any reduction in the effectiveness of the search. Better browsable displays of this sort can improve the efficiency of searching but appear not to alter effectivenenss

0.03293825 = product of:
  0.0658765 = sum of:
    0.0658765 = product of:
      0.131753 = sum of:
        0.131753 = weight(_text_:headings in 1163) [ClassicSimilarity], result of:
          0.131753 = score(doc=1163,freq=4.0), product of:
            0.24837378 = queryWeight, product of:
              4.849944 = idf(docFreq=940, maxDocs=44218)
              0.051211677 = queryNorm
            0.5304626 = fieldWeight in 1163, product of:
              2.0 = tf(freq=4.0), with freq of:
                4.0 = termFreq=4.0
              4.849944 = idf(docFreq=940, maxDocs=44218)
              0.0546875 = fieldNorm(doc=1163)
      0.5 = coord(1/2)
  0.5 = coord(1/2)

Abstract

This paper is the result of a request from Library of Congress leadership to assess pre-coordinated versus post-coordinated subject cataloging. It argues that the disadvantages of pre-coordinated subject strings are perennial and continue to hinder progress, while the advantages of post-coordinated subject cataloging have expanded, resulting in new opportunities to serve the needs of catalogers and end users alike. The consequences of retaining pre-coordinated headings will have long-term impacts that heavily out-weigh the short-term challenges of transitioning to new cataloging practices. By implementing post-coordinated, faceted vocabularies, the Library of Congress will be investing in the future of libraries.

0.028525364 = product of:
  0.057050727 = sum of:
    0.057050727 = product of:
      0.114101455 = sum of:
        0.114101455 = weight(_text_:headings in 97) [ClassicSimilarity], result of:
          0.114101455 = score(doc=97,freq=12.0), product of:
            0.24837378 = queryWeight, product of:
              4.849944 = idf(docFreq=940, maxDocs=44218)
              0.051211677 = queryNorm
            0.45939413 = fieldWeight in 97, product of:
              3.4641016 = tf(freq=12.0), with freq of:
                12.0 = termFreq=12.0
              4.849944 = idf(docFreq=940, maxDocs=44218)
              0.02734375 = fieldNorm(doc=97)
      0.5 = coord(1/2)
  0.5 = coord(1/2)

Abstract

Organizing and providing access to the resources an the Internet has been a problem area in spite of the availability of sophisticated search engines and other Software tools. There have been several attempts to organize the resources an the World Wide Web. Some of them have tried to use traditional library classification schemes such as the Library of Congress Classification, the Dewey Decimal Classification and others. However there is a need to assign proper subject headings to them and present them in a logical or hierarchical sequence to cater to the need for browsing. This paper attempts to describe an experimental system designed to organize and provide access to web documents using a faceted pre-coordinate indexing system based an the Deep Structure Indexing System (DSIS) derived from POPSI (Postulate based Permuted Subject Indexing) of Bhattacharyya, and the facet analysis and chain indexing system of Ranganathan. A prototype Software System has been designed to create a database of records specifying Web documents according to the Dublin Core and to input a faceted subject heading according to DSIS. Synonymous terms are added to the Standard terms in the heading using appropriate symbols. Once the data are entered along with a description and the URL of the web document, the record is stored in the System. More than one faceted subject heading can be assigned to a record depending an the content of the original document. The System stores the Surrogates and keeps the faceted subject headings separately after establishing a link. The search is carried out an index entries derived from the faceted subject heading using the chain indexing technique. If a single term is Input, the System searches for its presence in the faceted subject headings and displays the subject headings in a sorted sequence reflecting an organizing sequence. If the number of retrieved Keadings is too large (running into more than a page) the user has the option of entering another search term to be searched in combination. The System searches subject headings already retrieved and looks for those containing the second term. The retrieved faceted subject headings can be displayed and browsed. When the relevant subject heading is selected the system displays the records with their URLs. Using the URL, the original document an the web can be accessed. The prototype system developed in a Windows NT environment using ASP and a web server is under rigorous testing. The database and Index management routines need further development.

0.028232787 = product of:
  0.056465574 = sum of:
    0.056465574 = product of:
      0.11293115 = sum of:
        0.11293115 = weight(_text_:headings in 5599) [ClassicSimilarity], result of:
          0.11293115 = score(doc=5599,freq=4.0), product of:
            0.24837378 = queryWeight, product of:
              4.849944 = idf(docFreq=940, maxDocs=44218)
              0.051211677 = queryNorm
            0.45468226 = fieldWeight in 5599, 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=5599)
      0.5 = coord(1/2)
  0.5 = coord(1/2)

Abstract

This paper looks at changes affecting LCSH over its 100-year history. Adopting a linguistic conceptualization, it frames these changes as relating to the semantics, syntax and pragmatics of the LCSH language. While its category semantics has remained stable over time, the LCSH relational semantics underwent a significant upheaval when a thesaural structure was imposed upon its traditional See and See also structure. Over time the LCSH syntax has become increasingly complex as it has moved from being largely enumerative to in large part synthetic. Until fairly recently the LCSH pragmatics consisted of only one rule, viz, the injunction to assign specific headings. This rule, always controversial, has become even more debated and interpreted with the move to the online environment

Source

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

0.028232787 = product of:
  0.056465574 = sum of:
    0.056465574 = product of:
      0.11293115 = sum of:
        0.11293115 = weight(_text_:headings in 5602) [ClassicSimilarity], result of:
          0.11293115 = score(doc=5602,freq=4.0), product of:
            0.24837378 = queryWeight, product of:
              4.849944 = idf(docFreq=940, maxDocs=44218)
              0.051211677 = queryNorm
            0.45468226 = fieldWeight in 5602, 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=5602)
      0.5 = coord(1/2)
  0.5 = coord(1/2)

Abstract

This paper looks at changes affecting LCSH over its 100-year history. Adopting a linguistic conceptualization, it frames these changes as relating to the semantics, syntax and pragmatics of the LCSH language. While its category semantics has remained stable over time, the LCSH relational semantics underwent a significant upheaval when a thesaural structure was imposed upon its traditional See and See also structure. Over time the LCSH syntax has become increasingly complex as it has moved from being largely enumerative to in large part synthetic. Until fairly recently the LCSH pragmatics consisted of only one rule, viz, the injunction to assign specific headings. This rule, always controversial, has become even more debated and interpreted with the move to the online environment

Source

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

0.028232787 = product of:
  0.056465574 = sum of:
    0.056465574 = product of:
      0.11293115 = sum of:
        0.11293115 = weight(_text_:headings in 5609) [ClassicSimilarity], result of:
          0.11293115 = score(doc=5609,freq=4.0), product of:
            0.24837378 = queryWeight, product of:
              4.849944 = idf(docFreq=940, maxDocs=44218)
              0.051211677 = queryNorm
            0.45468226 = fieldWeight in 5609, 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=5609)
      0.5 = coord(1/2)
  0.5 = coord(1/2)

Abstract

In 1986 Libraries Unlimited published Cochrane's book, Improving LCSH for Use in Online Catalogs; Exercises for Self-Help with a Selection of Background Readings. This was preceded in 1981 by an ERIC publication (ED 208 900) by Cochrane, with Monika Kirtland Bibliographic and Bibliometric Essay which documented critical views of LCSH and an analysis of vocabulary control in LCSH (parts of which were published in Cataloging & Classification Quarterly' 1(2/3) (1982), 71-94). Three features of LCSH will be re-examined to check on progress since the time of these earlier publications: notes, structure of relationships between headings in the list, and links between Library of Congress classification numbers and LCSH or other vocabularies

Source

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

0.028232787 = product of:
  0.056465574 = sum of:
    0.056465574 = product of:
      0.11293115 = sum of:
        0.11293115 = weight(_text_:headings in 791) [ClassicSimilarity], result of:
          0.11293115 = score(doc=791,freq=4.0), product of:
            0.24837378 = queryWeight, product of:
              4.849944 = idf(docFreq=940, maxDocs=44218)
              0.051211677 = 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)
      0.5 = coord(1/2)
  0.5 = coord(1/2)

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.

0.028232787 = product of:
  0.056465574 = sum of:
    0.056465574 = product of:
      0.11293115 = sum of:
        0.11293115 = weight(_text_:headings in 1659) [ClassicSimilarity], result of:
          0.11293115 = score(doc=1659,freq=4.0), product of:
            0.24837378 = queryWeight, product of:
              4.849944 = idf(docFreq=940, maxDocs=44218)
              0.051211677 = queryNorm
            0.45468226 = fieldWeight in 1659, 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=1659)
      0.5 = coord(1/2)
  0.5 = coord(1/2)

LCSH

Subject headings

Subject

Subject headings

0.028232787 = product of:
  0.056465574 = sum of:
    0.056465574 = product of:
      0.11293115 = sum of:
        0.11293115 = weight(_text_:headings in 3431) [ClassicSimilarity], result of:
          0.11293115 = score(doc=3431,freq=4.0), product of:
            0.24837378 = queryWeight, product of:
              4.849944 = idf(docFreq=940, maxDocs=44218)
              0.051211677 = queryNorm
            0.45468226 = fieldWeight in 3431, 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=3431)
      0.5 = coord(1/2)
  0.5 = coord(1/2)

Abstract

With the current information environment characterized by the proliferation of digital resources, including collaboratively created and shared resources, Library of Congress Subject Headings (LCSH) is facing the challenges of effective and efficient subject-based organization and retrieval of digital resources. To explore the feasibility of utilizing LCSH in a digital environment, we might need to revisit its basic characteristics. The objectives of our study were to analyze LCSH in both syntactic and relational structures, to discover the structural characteristics of LCSH, and to identify problems and issues for the feasibility of LCSH as an effective subject access tool. This study reports and discusses issues raised by the syntactic and hierarchical structures of LCSH that present challenges to its use in a networked environment. Given the results of this study, we recommend a number of provisional future directions for the development of LCSH towards further becoming a viable system for digital and networked resources.

0.028232787 = product of:
  0.056465574 = sum of:
    0.056465574 = product of:
      0.11293115 = sum of:
        0.11293115 = weight(_text_:headings in 310) [ClassicSimilarity], result of:
          0.11293115 = score(doc=310,freq=4.0), product of:
            0.24837378 = queryWeight, product of:
              4.849944 = idf(docFreq=940, maxDocs=44218)
              0.051211677 = 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)
      0.5 = coord(1/2)
  0.5 = coord(1/2)

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.

0.028232787 = product of:
  0.056465574 = sum of:
    0.056465574 = product of:
      0.11293115 = sum of:
        0.11293115 = weight(_text_:headings in 1886) [ClassicSimilarity], result of:
          0.11293115 = score(doc=1886,freq=4.0), product of:
            0.24837378 = queryWeight, product of:
              4.849944 = idf(docFreq=940, maxDocs=44218)
              0.051211677 = queryNorm
            0.45468226 = fieldWeight in 1886, 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=1886)
      0.5 = coord(1/2)
  0.5 = coord(1/2)

Abstract

This article presents an Italian experience of developing streamlined semantic interoperability between the Italian Thesaurus of Nuovo soggettario and the Library of Congress Subject Headings (LCSH). This ongoing project must take into consideration the differences between the two indexing tools, while the criteria on which the resulting actions are based are being clarified continually. Reciprocal interoperability, thanks to the Simple Knowledge Organization System format, enables us to create links with English language subject headings. The National Central Library of Florence is studying methods of automatically catching LCSH equivalents and the question of how to take advantage of both Semantic Web outputs and the multilingual dataset of Wikidata.

0.026618127 = product of:
  0.053236254 = sum of:
    0.053236254 = product of:
      0.10647251 = sum of:
        0.10647251 = weight(_text_:headings in 762) [ClassicSimilarity], result of:
          0.10647251 = score(doc=762,freq=2.0), product of:
            0.24837378 = queryWeight, product of:
              4.849944 = idf(docFreq=940, maxDocs=44218)
              0.051211677 = queryNorm
            0.42867854 = fieldWeight in 762, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              4.849944 = idf(docFreq=940, maxDocs=44218)
              0.0625 = fieldNorm(doc=762)
      0.5 = coord(1/2)
  0.5 = coord(1/2)

Abstract

Delineates on the changing role of vocabulary control devices such as classification, subject headings, and thesaurus. Identifies the basic issue in the design and development of these devices and their role in the changing information technology. The paper identifies the differentiations needed in the new roles of these devices in data base technology

0.026618127 = product of:
  0.053236254 = sum of:
    0.053236254 = product of:
      0.10647251 = sum of:
        0.10647251 = weight(_text_:headings in 4459) [ClassicSimilarity], result of:
          0.10647251 = score(doc=4459,freq=2.0), product of:
            0.24837378 = queryWeight, product of:
              4.849944 = idf(docFreq=940, maxDocs=44218)
              0.051211677 = queryNorm
            0.42867854 = fieldWeight in 4459, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              4.849944 = idf(docFreq=940, maxDocs=44218)
              0.0625 = fieldNorm(doc=4459)
      0.5 = coord(1/2)
  0.5 = coord(1/2)

Abstract

Discusses established approaches to subject access using subject headings (such as LCSH), and the demands for improved subject access associated with the widespread availability of OPACs and the evidence of problems experienced by catalogue users in subject searching