Search (10 results, page 1 of 1)

O'Neill, E.T.; Chan, L.M.; Childress, E.; Dean, R.; El-Hoshy, L.M.; Vizine-Goetz, D.: Form subdivisions : their identification and use in LCSH (2001) 0.04
```
0.04125603 = product of:
  0.08251206 = sum of:
    0.08251206 = sum of:
      0.04560902 = weight(_text_:bibliographic in 2205) [ClassicSimilarity], result of:
        0.04560902 = score(doc=2205,freq=2.0), product of:
          0.17672792 = queryWeight, product of:
            3.893044 = idf(docFreq=2449, maxDocs=44218)
            0.045395818 = queryNorm
          0.2580748 = fieldWeight in 2205, product of:
            1.4142135 = tf(freq=2.0), with freq of:
              2.0 = termFreq=2.0
            3.893044 = idf(docFreq=2449, maxDocs=44218)
            0.046875 = fieldNorm(doc=2205)
      0.03690304 = weight(_text_:22 in 2205) [ClassicSimilarity], result of:
        0.03690304 = score(doc=2205,freq=2.0), product of:
          0.15896842 = queryWeight, product of:
            3.5018296 = idf(docFreq=3622, maxDocs=44218)
            0.045395818 = queryNorm
          0.23214069 = fieldWeight in 2205, 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=2205)
  0.5 = coord(1/2)
```
Abstract

Form subdivisions have always been an important part of the Library of Congress Subject Headings. However, when the MARC format was developed, no separate subfield code to identify form subdivisions was defined. Form and topical subdivisions were both included within a general subdivision category. In 1995, the USMARC Advisory Group approved a proposal defining subfield v for form subdivisions, and in 1999 the Library of Congress (LC) began identifying form subdivisions with the new code. However, there are millions of older bibliographic records lacking the explicit form subdivision coding. Identifying form subdivisions retrospectively is not a simple task. An algorithmic method was developed to identify form subdivisions coded as general subdivisions. The algorithm was used to identify 2,563 unique form subdivisions or combinations of form subdivisions in OCLC's WorldCat. The algorithm proved to be highly accurate with an error rate estimated to be less than 0.1%. The observed usage of the form subdivisions was highly skewed with the 100 most used form subdivisions or combinations of subdivisions accounting for 90% of the assignments.

Date

10. 9.2000 17:38:22

Chan, L.M.; Mitchell, J.S.: Dewey Decimal Classification : principles and applications (2003) 0.02

0.021526773 = product of:
  0.043053545 = sum of:
    0.043053545 = product of:
      0.08610709 = sum of:
        0.08610709 = weight(_text_:22 in 3247) [ClassicSimilarity], result of:
          0.08610709 = score(doc=3247,freq=2.0), product of:
            0.15896842 = queryWeight, product of:
              3.5018296 = idf(docFreq=3622, maxDocs=44218)
              0.045395818 = queryNorm
            0.5416616 = fieldWeight in 3247, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              3.5018296 = idf(docFreq=3622, maxDocs=44218)
              0.109375 = fieldNorm(doc=3247)
      0.5 = coord(1/2)
  0.5 = coord(1/2)

Object: DDC-22

Chan, L.M.: Social bookmarking and subject indexing (2011) 0.02

0.01900376 = product of:
  0.03800752 = sum of:
    0.03800752 = product of:
      0.07601504 = sum of:
        0.07601504 = weight(_text_:bibliographic in 1806) [ClassicSimilarity], result of:
          0.07601504 = score(doc=1806,freq=2.0), product of:
            0.17672792 = queryWeight, product of:
              3.893044 = idf(docFreq=2449, maxDocs=44218)
              0.045395818 = queryNorm
            0.43012467 = fieldWeight in 1806, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              3.893044 = idf(docFreq=2449, maxDocs=44218)
              0.078125 = fieldNorm(doc=1806)
      0.5 = coord(1/2)
  0.5 = coord(1/2)

Series: IFLA series on bibliographic control; vol. 42

Chan, L.M.: Library of Congress Subject Headings : principles and application (1995) 0.02

0.01845152 = product of:
  0.03690304 = sum of:
    0.03690304 = product of:
      0.07380608 = sum of:
        0.07380608 = weight(_text_:22 in 3985) [ClassicSimilarity], result of:
          0.07380608 = score(doc=3985,freq=2.0), product of:
            0.15896842 = queryWeight, product of:
              3.5018296 = idf(docFreq=3622, maxDocs=44218)
              0.045395818 = queryNorm
            0.46428138 = fieldWeight in 3985, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              3.5018296 = idf(docFreq=3622, maxDocs=44218)
              0.09375 = fieldNorm(doc=3985)
      0.5 = coord(1/2)
  0.5 = coord(1/2)

Date: 25.11.2005 18:37:22

Chan, L.M.; Vizine-Goetz, D.: Errors and obsolete elements in assigned Library of Congress Subject Headings : implications for subject cataloging and subject authority control (1997) 0.01
```
0.013302632 = product of:
  0.026605263 = sum of:
    0.026605263 = product of:
      0.053210527 = sum of:
        0.053210527 = weight(_text_:bibliographic in 492) [ClassicSimilarity], result of:
          0.053210527 = score(doc=492,freq=2.0), product of:
            0.17672792 = queryWeight, product of:
              3.893044 = idf(docFreq=2449, maxDocs=44218)
              0.045395818 = queryNorm
            0.30108726 = fieldWeight in 492, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              3.893044 = idf(docFreq=2449, maxDocs=44218)
              0.0546875 = fieldNorm(doc=492)
      0.5 = coord(1/2)
  0.5 = coord(1/2)
```
Abstract

An analysis of a sample of 9.442 headings assigned by the LoC to bibliographic records disclosed 2 types of invalid headings: those that were erroneous and those that were obsolete. Each type revealed recurring patterns. Errors and obsolete elements occuring in assigned heading involve MARC coding, terminology in main headings and subdivisions, application of subdivisions, and in mechanical elements such as punctuation and capitalization. Different headings (e.g. personal name, corporate name, topical, etc.) display different patterns as well as predominance of errors and obsoleteness. Although the overall error rate is low, an awareness and understanding of patterns of errors and obsolescnce in subject heading strings should contribute to improvement in subject heading assignment and subject authority control
O'Neill, E.T.; Chan, L.M.: FAST - a new approach to controlled subject access (2008) 0.01
```
0.011402255 = product of:
  0.02280451 = sum of:
    0.02280451 = product of:
      0.04560902 = sum of:
        0.04560902 = weight(_text_:bibliographic in 2181) [ClassicSimilarity], result of:
          0.04560902 = score(doc=2181,freq=2.0), product of:
            0.17672792 = queryWeight, product of:
              3.893044 = idf(docFreq=2449, maxDocs=44218)
              0.045395818 = queryNorm
            0.2580748 = fieldWeight in 2181, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              3.893044 = idf(docFreq=2449, 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.
O'Neill, E.T.; Childress, E.; Dean, R.; Kammerer, K.; Vizine-Goetz, D.; Chan, L.M.; El-Hoshy, L.: FAST: faceted application of subject terminology (2003) 0.01
```
0.00950188 = product of:
  0.01900376 = sum of:
    0.01900376 = product of:
      0.03800752 = sum of:
        0.03800752 = weight(_text_:bibliographic in 3816) [ClassicSimilarity], result of:
          0.03800752 = score(doc=3816,freq=2.0), product of:
            0.17672792 = queryWeight, product of:
              3.893044 = idf(docFreq=2449, maxDocs=44218)
              0.045395818 = queryNorm
            0.21506234 = fieldWeight in 3816, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              3.893044 = idf(docFreq=2449, maxDocs=44218)
              0.0390625 = fieldNorm(doc=3816)
      0.5 = coord(1/2)
  0.5 = coord(1/2)
```
Abstract

The Library of Congress Subject Headings schema (LCSH) is by far 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 is to retain the very rich vocabulary of LCSH while making the schema easier to understand, control, apply, and use. The schema maintains upward compatibility with LCSH, and any valid set of LC subject headings can be converted to FAST headings.

Chan, L.M.; Hodges, T.: Entering the millennium : a new century for LCSH (2000) 0.01

0.00922576 = product of:
  0.01845152 = sum of:
    0.01845152 = product of:
      0.03690304 = sum of:
        0.03690304 = weight(_text_:22 in 5920) [ClassicSimilarity], result of:
          0.03690304 = score(doc=5920,freq=2.0), product of:
            0.15896842 = queryWeight, product of:
              3.5018296 = idf(docFreq=3622, maxDocs=44218)
              0.045395818 = 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(1/2)

Date: 27. 5.2001 16:22:21

Chan, L.M.; Hodges, T.L.: Library of Congress Classification (LCC) (2009) 0.01

0.00922576 = product of:
  0.01845152 = sum of:
    0.01845152 = product of:
      0.03690304 = sum of:
        0.03690304 = weight(_text_:22 in 3842) [ClassicSimilarity], result of:
          0.03690304 = score(doc=3842,freq=2.0), product of:
            0.15896842 = queryWeight, product of:
              3.5018296 = idf(docFreq=3622, maxDocs=44218)
              0.045395818 = queryNorm
            0.23214069 = fieldWeight in 3842, 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=3842)
      0.5 = coord(1/2)
  0.5 = coord(1/2)

Date: 27. 8.2011 14:22:42

Yi, K.; Chan, L.M.: Linking folksonomy to Library of Congress subject headings : an exploratory study (2009) 0.01
```
0.0076015037 = product of:
  0.0152030075 = sum of:
    0.0152030075 = product of:
      0.030406015 = sum of:
        0.030406015 = weight(_text_:bibliographic in 3616) [ClassicSimilarity], result of:
          0.030406015 = score(doc=3616,freq=2.0), product of:
            0.17672792 = queryWeight, product of:
              3.893044 = idf(docFreq=2449, maxDocs=44218)
              0.045395818 = queryNorm
            0.17204987 = fieldWeight in 3616, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              3.893044 = idf(docFreq=2449, maxDocs=44218)
              0.03125 = fieldNorm(doc=3616)
      0.5 = coord(1/2)
  0.5 = coord(1/2)
```
Abstract

Purpose - The purpose of this paper is to investigate the linking of a folksonomy (user vocabulary) and LCSH (controlled vocabulary) on the basis of word matching, for the potential use of LCSH in bringing order to folksonomies. Design/methodology/approach - A selected sample of a folksonomy from a popular collaborative tagging system, Delicious, was word-matched with LCSH. LCSH was transformed into a tree structure called an LCSH tree for the matching. A close examination was conducted on the characteristics of folksonomies, the overlap of folksonomies with LCSH, and the distribution of folksonomies over the LCSH tree. Findings - The experimental results showed that the total proportion of tags being matched with LC subject headings constituted approximately two-thirds of all tags involved, with an additional 10 percent of the remaining tags having potential matches. A number of barriers for the linking as well as two areas in need of improving the matching are identified and described. Three important tag distribution patterns over the LCSH tree were identified and supported: skewedness, multifacet, and Zipfian-pattern. Research limitations/implications - The results of the study can be adopted for the development of innovative methods of mapping between folksonomy and LCSH, which directly contributes to effective access and retrieval of tagged web resources and to the integration of multiple information repositories based on the two vocabularies. Practical implications - The linking of controlled vocabularies can be applicable to enhance information retrieval capability within collaborative tagging systems as well as across various tagging system information depositories and bibliographic databases. Originality/value - This is among frontier works that examines the potential of linking a folksonomy, extracted from a collaborative tagging system, to an authority-maintained subject heading system. It provides exploratory data to support further advanced mapping methods for linking the two vocabularies.

Search (10 results, page 1 of 1)

Authors

Years

Types

Themes