Search (33 results, page 1 of 2)

0.019396545 = product of:
  0.03879309 = sum of:
    0.03879309 = sum of:
      0.008140436 = weight(_text_:a in 5920) [ClassicSimilarity], result of:
        0.008140436 = score(doc=5920,freq=12.0), product of:
          0.043477926 = queryWeight, product of:
            1.153047 = idf(docFreq=37942, maxDocs=44218)
            0.037706986 = queryNorm
          0.18723148 = fieldWeight in 5920, product of:
            3.4641016 = tf(freq=12.0), with freq of:
              12.0 = termFreq=12.0
            1.153047 = idf(docFreq=37942, maxDocs=44218)
            0.046875 = fieldNorm(doc=5920)
      0.030652655 = weight(_text_:22 in 5920) [ClassicSimilarity], result of:
        0.030652655 = score(doc=5920,freq=2.0), product of:
          0.13204344 = queryWeight, product of:
            3.5018296 = idf(docFreq=3622, maxDocs=44218)
            0.037706986 = 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)

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

Type

a

0.018649647 = product of:
  0.037299294 = sum of:
    0.037299294 = sum of:
      0.006646639 = weight(_text_:a in 131) [ClassicSimilarity], result of:
        0.006646639 = score(doc=131,freq=8.0), product of:
          0.043477926 = queryWeight, product of:
            1.153047 = idf(docFreq=37942, maxDocs=44218)
            0.037706986 = queryNorm
          0.15287387 = fieldWeight in 131, product of:
            2.828427 = tf(freq=8.0), with freq of:
              8.0 = termFreq=8.0
            1.153047 = idf(docFreq=37942, maxDocs=44218)
            0.046875 = fieldNorm(doc=131)
      0.030652655 = weight(_text_:22 in 131) [ClassicSimilarity], result of:
        0.030652655 = score(doc=131,freq=2.0), product of:
          0.13204344 = queryWeight, product of:
            3.5018296 = idf(docFreq=3622, maxDocs=44218)
            0.037706986 = 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)

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

Type

a

0.018649647 = product of:
  0.037299294 = sum of:
    0.037299294 = sum of:
      0.006646639 = weight(_text_:a in 3837) [ClassicSimilarity], result of:
        0.006646639 = score(doc=3837,freq=8.0), product of:
          0.043477926 = queryWeight, product of:
            1.153047 = idf(docFreq=37942, maxDocs=44218)
            0.037706986 = queryNorm
          0.15287387 = fieldWeight in 3837, product of:
            2.828427 = tf(freq=8.0), with freq of:
              8.0 = termFreq=8.0
            1.153047 = idf(docFreq=37942, maxDocs=44218)
            0.046875 = fieldNorm(doc=3837)
      0.030652655 = weight(_text_:22 in 3837) [ClassicSimilarity], result of:
        0.030652655 = score(doc=3837,freq=2.0), product of:
          0.13204344 = queryWeight, product of:
            3.5018296 = idf(docFreq=3622, maxDocs=44218)
            0.037706986 = 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(1/2)

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

Type

a

0.0022209487 = product of:
  0.0044418974 = sum of:
    0.0044418974 = product of:
      0.008883795 = sum of:
        0.008883795 = weight(_text_:a in 97) [ClassicSimilarity], result of:
          0.008883795 = score(doc=97,freq=42.0), product of:
            0.043477926 = queryWeight, product of:
              1.153047 = idf(docFreq=37942, maxDocs=44218)
              0.037706986 = queryNorm
            0.20432885 = fieldWeight in 97, product of:
              6.4807405 = tf(freq=42.0), with freq of:
                42.0 = termFreq=42.0
              1.153047 = idf(docFreq=37942, 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.
An interesting but somewhat confusing article telling how the writers described web pages with Dublin Core metadata, including a faceted classification, and built a system that lets users browse the collection through the facets. They seem to want to cover too much in a short article, and unnecessary space is given over to screen shots showing how Dublin Core metadata was entered. The screen shots of the resulting browsable system are, unfortunately, not as enlightening as one would hope, and there is no discussion of how the system was actually written or the technology behind it. Still, it could be worth reading as an example of such a system and how it is treated in journals.

Footnote

Vgl. auch: Devadason, F.J.: Facet analysis and Semantic Web: musings of a student of Ranganathan. Unter: http://www.geocities.com/devadason.geo/FASEMWEB.html#FacetedIndex.

Type

a

0.0022155463 = product of:
  0.0044310926 = sum of:
    0.0044310926 = product of:
      0.008862185 = sum of:
        0.008862185 = weight(_text_:a in 2417) [ClassicSimilarity], result of:
          0.008862185 = score(doc=2417,freq=8.0), product of:
            0.043477926 = queryWeight, product of:
              1.153047 = idf(docFreq=37942, maxDocs=44218)
              0.037706986 = queryNorm
            0.20383182 = fieldWeight in 2417, product of:
              2.828427 = tf(freq=8.0), with freq of:
                8.0 = termFreq=8.0
              1.153047 = idf(docFreq=37942, maxDocs=44218)
              0.0625 = fieldNorm(doc=2417)
      0.5 = coord(1/2)
  0.5 = coord(1/2)

Abstract

An online series of articles explaining controlled vocabularies and, in particular, faceted classification. It is not yet finished, but what they have covered is very well done, practical and informative, with useful advice and a full treatment. It is worth reading now, and when they actually get to performing facet analysis and making a faceted system, it will make a very useful reference.

0.0022155463 = product of:
  0.0044310926 = sum of:
    0.0044310926 = product of:
      0.008862185 = sum of:
        0.008862185 = weight(_text_:a in 2461) [ClassicSimilarity], result of:
          0.008862185 = score(doc=2461,freq=8.0), product of:
            0.043477926 = queryWeight, product of:
              1.153047 = idf(docFreq=37942, maxDocs=44218)
              0.037706986 = queryNorm
            0.20383182 = fieldWeight in 2461, product of:
              2.828427 = tf(freq=8.0), with freq of:
                8.0 = termFreq=8.0
              1.153047 = idf(docFreq=37942, maxDocs=44218)
              0.0625 = fieldNorm(doc=2461)
      0.5 = coord(1/2)
  0.5 = coord(1/2)

Abstract

An online series of articles explaining controlled vocabularies and, in particular, faceted classification. It is not yet finished, but what they have covered is very well done, practical and informative, with useful advice and a full treatment. It is worth reading now, and when they actually get to performing facet analysis and making a faceted system, it will make a very useful reference.

0.0022155463 = product of:
  0.0044310926 = sum of:
    0.0044310926 = product of:
      0.008862185 = sum of:
        0.008862185 = weight(_text_:a in 2469) [ClassicSimilarity], result of:
          0.008862185 = score(doc=2469,freq=8.0), product of:
            0.043477926 = queryWeight, product of:
              1.153047 = idf(docFreq=37942, maxDocs=44218)
              0.037706986 = queryNorm
            0.20383182 = fieldWeight in 2469, product of:
              2.828427 = tf(freq=8.0), with freq of:
                8.0 = termFreq=8.0
              1.153047 = idf(docFreq=37942, maxDocs=44218)
              0.0625 = fieldNorm(doc=2469)
      0.5 = coord(1/2)
  0.5 = coord(1/2)

Abstract

An online series of articles explaining controlled vocabularies and, in particular, faceted classification. It is not yet finished, but what they have covered is very well done, practical and informative, with useful advice and a full treatment. It is worth reading now, and when they actually get to performing facet analysis and making a faceted system, it will make a very useful reference.

0.0021981692 = product of:
  0.0043963385 = sum of:
    0.0043963385 = product of:
      0.008792677 = sum of:
        0.008792677 = weight(_text_:a in 2181) [ClassicSimilarity], result of:
          0.008792677 = score(doc=2181,freq=14.0), product of:
            0.043477926 = queryWeight, product of:
              1.153047 = idf(docFreq=37942, maxDocs=44218)
              0.037706986 = queryNorm
            0.20223314 = fieldWeight in 2181, product of:
              3.7416575 = tf(freq=14.0), with freq of:
                14.0 = termFreq=14.0
              1.153047 = idf(docFreq=37942, 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.

Type

a

0.0021451935 = product of:
  0.004290387 = sum of:
    0.004290387 = product of:
      0.008580774 = sum of:
        0.008580774 = weight(_text_:a in 3966) [ClassicSimilarity], result of:
          0.008580774 = score(doc=3966,freq=30.0), product of:
            0.043477926 = queryWeight, product of:
              1.153047 = idf(docFreq=37942, maxDocs=44218)
              0.037706986 = queryNorm
            0.19735932 = fieldWeight in 3966, product of:
              5.477226 = tf(freq=30.0), with freq of:
                30.0 = termFreq=30.0
              1.153047 = idf(docFreq=37942, 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.

Source

Subject retrieval in a networked environment: Proceedings of the IFLA Satellite Meeting held in Dublin, OH, 14-16 August 2001 and sponsored by the IFLA Classification and Indexing Section, the IFLA Information Technology Section and OCLC. Ed.: I.C. McIlwaine

Type

a

0.0019582848 = product of:
  0.0039165695 = sum of:
    0.0039165695 = product of:
      0.007833139 = sum of:
        0.007833139 = weight(_text_:a in 2549) [ClassicSimilarity], result of:
          0.007833139 = score(doc=2549,freq=16.0), product of:
            0.043477926 = queryWeight, product of:
              1.153047 = idf(docFreq=37942, maxDocs=44218)
              0.037706986 = queryNorm
            0.18016359 = fieldWeight in 2549, product of:
              4.0 = tf(freq=16.0), with freq of:
                16.0 = termFreq=16.0
              1.153047 = idf(docFreq=37942, 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.

Type

a

0.001938603 = product of:
  0.003877206 = sum of:
    0.003877206 = product of:
      0.007754412 = sum of:
        0.007754412 = weight(_text_:a in 3826) [ClassicSimilarity], result of:
          0.007754412 = score(doc=3826,freq=2.0), product of:
            0.043477926 = queryWeight, product of:
              1.153047 = idf(docFreq=37942, maxDocs=44218)
              0.037706986 = queryNorm
            0.17835285 = fieldWeight in 3826, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              1.153047 = idf(docFreq=37942, maxDocs=44218)
              0.109375 = fieldNorm(doc=3826)
      0.5 = coord(1/2)
  0.5 = coord(1/2)

Type

a

0.0019187195 = product of:
  0.003837439 = sum of:
    0.003837439 = product of:
      0.007674878 = sum of:
        0.007674878 = weight(_text_:a in 2900) [ClassicSimilarity], result of:
          0.007674878 = score(doc=2900,freq=6.0), product of:
            0.043477926 = queryWeight, product of:
              1.153047 = idf(docFreq=37942, maxDocs=44218)
              0.037706986 = queryNorm
            0.17652355 = fieldWeight in 2900, product of:
              2.4494898 = tf(freq=6.0), with freq of:
                6.0 = termFreq=6.0
              1.153047 = idf(docFreq=37942, maxDocs=44218)
              0.0625 = fieldNorm(doc=2900)
      0.5 = coord(1/2)
  0.5 = coord(1/2)

Abstract

An online series of articles explaining controlled vocabularies and, in particular, faceted classification. It is not yet finished, but what they have covered is very well done, practical and informative, with useful advice and a full treatment. It is worth reading now, and when they actually get to performing facet analysis and making a faceted system, it will make a very useful reference.

0.0019187195 = product of:
  0.003837439 = sum of:
    0.003837439 = product of:
      0.007674878 = sum of:
        0.007674878 = weight(_text_:a in 5141) [ClassicSimilarity], result of:
          0.007674878 = score(doc=5141,freq=6.0), product of:
            0.043477926 = queryWeight, product of:
              1.153047 = idf(docFreq=37942, maxDocs=44218)
              0.037706986 = queryNorm
            0.17652355 = fieldWeight in 5141, product of:
              2.4494898 = tf(freq=6.0), with freq of:
                6.0 = termFreq=6.0
              1.153047 = idf(docFreq=37942, maxDocs=44218)
              0.0625 = fieldNorm(doc=5141)
      0.5 = coord(1/2)
  0.5 = coord(1/2)

Abstract

An online series of articles explaining controlled vocabularies and, in particular, faceted classification. It is not yet finished, but what they have covered is very well done, practical and informative, with useful advice and a full treatment. It is worth reading now, and when they actually get to performing facet analysis and making a faceted system, it will make a very useful reference.

0.0019187195 = product of:
  0.003837439 = sum of:
    0.003837439 = product of:
      0.007674878 = sum of:
        0.007674878 = weight(_text_:a in 2468) [ClassicSimilarity], result of:
          0.007674878 = score(doc=2468,freq=6.0), product of:
            0.043477926 = queryWeight, product of:
              1.153047 = idf(docFreq=37942, maxDocs=44218)
              0.037706986 = queryNorm
            0.17652355 = fieldWeight in 2468, product of:
              2.4494898 = tf(freq=6.0), with freq of:
                6.0 = termFreq=6.0
              1.153047 = idf(docFreq=37942, maxDocs=44218)
              0.0625 = fieldNorm(doc=2468)
      0.5 = coord(1/2)
  0.5 = coord(1/2)

Abstract

An online series of articles explaining controlled vocabularies and, in particular, faceted classification. It is not yet finished, but what they have covered is very well done, practical and informative, with useful advice and a full treatment. It is worth reading now, and when they actually get to performing facet analysis and making a faceted system, it will make a very useful reference.

0.0018577921 = product of:
  0.0037155843 = sum of:
    0.0037155843 = product of:
      0.0074311686 = sum of:
        0.0074311686 = weight(_text_:a in 5674) [ClassicSimilarity], result of:
          0.0074311686 = score(doc=5674,freq=10.0), product of:
            0.043477926 = queryWeight, product of:
              1.153047 = idf(docFreq=37942, maxDocs=44218)
              0.037706986 = queryNorm
            0.1709182 = fieldWeight in 5674, product of:
              3.1622777 = tf(freq=10.0), with freq of:
                10.0 = termFreq=10.0
              1.153047 = idf(docFreq=37942, maxDocs=44218)
              0.046875 = fieldNorm(doc=5674)
      0.5 = coord(1/2)
  0.5 = coord(1/2)

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.

Type

a

0.0018577921 = product of:
  0.0037155843 = sum of:
    0.0037155843 = product of:
      0.0074311686 = sum of:
        0.0074311686 = weight(_text_:a in 791) [ClassicSimilarity], result of:
          0.0074311686 = score(doc=791,freq=10.0), product of:
            0.043477926 = queryWeight, product of:
              1.153047 = idf(docFreq=37942, maxDocs=44218)
              0.037706986 = queryNorm
            0.1709182 = fieldWeight in 791, product of:
              3.1622777 = tf(freq=10.0), with freq of:
                10.0 = termFreq=10.0
              1.153047 = idf(docFreq=37942, 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.

Type

a

0.0016959244 = product of:
  0.0033918489 = sum of:
    0.0033918489 = product of:
      0.0067836978 = sum of:
        0.0067836978 = weight(_text_:a in 96) [ClassicSimilarity], result of:
          0.0067836978 = score(doc=96,freq=12.0), product of:
            0.043477926 = queryWeight, product of:
              1.153047 = idf(docFreq=37942, maxDocs=44218)
              0.037706986 = queryNorm
            0.15602624 = fieldWeight in 96, product of:
              3.4641016 = tf(freq=12.0), with freq of:
                12.0 = termFreq=12.0
              1.153047 = idf(docFreq=37942, maxDocs=44218)
              0.0390625 = fieldNorm(doc=96)
      0.5 = coord(1/2)
  0.5 = coord(1/2)

Abstract

The paper looks at ways in which traditional classification and indexing tools have dealt with the relationships between constituent terms; variations in these are examined and compared with the methods used in machine searching, particularly of the Internet and World Wide Web. Apparent correspondences with features of index languages are identified, and further methods of applying classification and indexing theory to machine retrieval are proposed. There are various ways in which indexing and retrieval systems, both conventional and electronic, deal with the problem of searching for documents on a subject basis, and various approaches to the analysis and processing of a query. There appear to be three basic models; the taxonomic or structural system, in which the user is offered a map of the `universe of knowledge'; the language based system, which offers a vocabulary of the subject and a grammar for dealing with compound statements; and the mathematical model using the language of symbolic logic or the algebra of set theory

Type

a

0.0016959244 = product of:
  0.0033918489 = sum of:
    0.0033918489 = product of:
      0.0067836978 = sum of:
        0.0067836978 = weight(_text_:a in 2703) [ClassicSimilarity], result of:
          0.0067836978 = score(doc=2703,freq=12.0), product of:
            0.043477926 = queryWeight, product of:
              1.153047 = idf(docFreq=37942, maxDocs=44218)
              0.037706986 = queryNorm
            0.15602624 = fieldWeight in 2703, product of:
              3.4641016 = tf(freq=12.0), with freq of:
                12.0 = termFreq=12.0
              1.153047 = idf(docFreq=37942, maxDocs=44218)
              0.0390625 = fieldNorm(doc=2703)
      0.5 = coord(1/2)
  0.5 = coord(1/2)

Abstract

This paper discusses two inter-related themes: the retrieval potential of faceted thesauri and XML representations of fundamental facets. Initial findings are discussed from the ongoing 'FACET' project, in collaboration with the National Museum of Science and Industry. The work discussed seeks to take advantage of the structure afforded by faceted systems for multi-term queries and flexible matching, focusing in this paper an the Art and Architecture Thesaurus. A multi-term matching function yields ranked results with partial matches via semantic term expansion, based an a measure of distance over the semantic index space formed by thesaurus relationships. Our intention is to drive the system from general representations and a common query structure and interface. To this end, we are developing an XML representation based an work by the Classification Research Group an fundamental facets or categories. The XML representation maps categories to particular thesauri and hierarchies. The system interface, which is configured by the mapping, incorporates a thesaurus browser with navigation history together with a term search facility and drag and drop query builder.

Type

a

0.0016788795 = product of:
  0.003357759 = sum of:
    0.003357759 = product of:
      0.006715518 = sum of:
        0.006715518 = weight(_text_:a in 1395) [ClassicSimilarity], result of:
          0.006715518 = score(doc=1395,freq=6.0), product of:
            0.043477926 = queryWeight, product of:
              1.153047 = idf(docFreq=37942, maxDocs=44218)
              0.037706986 = queryNorm
            0.1544581 = fieldWeight in 1395, product of:
              2.4494898 = tf(freq=6.0), with freq of:
                6.0 = termFreq=6.0
              1.153047 = idf(docFreq=37942, maxDocs=44218)
              0.0546875 = fieldNorm(doc=1395)
      0.5 = coord(1/2)
  0.5 = coord(1/2)

Abstract

This article deals with the meaningful processing of information in relation to two systems of Information processing: pre-coordination and post-coordination. The different approaches are discussed, with emphasis an the need for a controlled vocabulary in information retrieval. Assigned indexing, which employs a controlled vocabulary, is described in detail. Types of indexing language can be divided into two broad groups - those using pre-coordinated terms and those depending an post-coordination. They represent two different basic approaches in processing and Information retrieval. The historical development of these two approaches is described, as well as the two tools that apply to these approaches: thesauri and subject headings.

Type

a

0.0016616598 = product of:
  0.0033233196 = sum of:
    0.0033233196 = product of:
      0.006646639 = sum of:
        0.006646639 = weight(_text_:a in 5599) [ClassicSimilarity], result of:
          0.006646639 = score(doc=5599,freq=8.0), product of:
            0.043477926 = queryWeight, product of:
              1.153047 = idf(docFreq=37942, maxDocs=44218)
              0.037706986 = queryNorm
            0.15287387 = fieldWeight in 5599, product of:
              2.828427 = tf(freq=8.0), with freq of:
                8.0 = termFreq=8.0
              1.153047 = idf(docFreq=37942, 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

Type

a