Search (47 results, page 1 of 3)

  • × author_ss:"Chan, L.M."
  1. Chan, L.M.; Hodges, T.: Entering the millennium : a new century for LCSH (2000) 0.02 
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    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
  2. 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) 0.02 
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    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
    Type
    a
  3. Chan, L.M.; Hodges, T.L.: Library of Congress Classification (LCC) (2009) 0.02 
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    Abstract
    The Library of Congress Classification (LCC), originally designed for classifying the Library's own collection, is now used in a wide range of libraries, both in the United States and abroad. This entry recounts its history and development from its genesis to the present time, leading up to an explanation of LCC structure, tables, and notation. It then considers the system's potential for wider application in the online age, through speculation on using LCC as a tool for (a) partitioning large files; (b) generating domain-specific taxonomies; and (c) integrating classification and controlled subject terms for improved retrieval in the online public access catalog (OPAC) and the Internet. Finally, analyzing both its strong and relatively weak features, it addresses the question of whether in its current state LCC is in all respects ready for playing such roles
    Date
    27. 8.2011 14:22:42
    Type
    a
  4. Chan, L.M.; Mitchell, J.S.: Dewey Decimal Classification : principles and applications (2003) 0.02 
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    Object
    DDC-22
  5. Chan, L.M.: Library of Congress Subject Headings : principles and application (1995) 0.02 
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    Date
    25.11.2005 18:37:22
  6. Chan, L.M.; Hodges, T.L.: ¬The Library of Congress Classification (2000) 0.00 
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    Source
    The future of classification. Ed. R. Marcella u. A. Maltby
    Type
    a
  7. Chan, L.M.: ¬A subject cataloging code? (1989) 0.00 
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    Abstract
    Contribution to a thematic issue devoted to a subject control in on-line catalogues. Examines whether a subject cataloguing code is, at this point in time, necessary or economically feasible, as well as questioning who will develop such a code and if experiences with AACR2 should make librarians fearful or hopeful about similar work with subject headings.
    Type
    a
  8. Chan, L.M.: Functions of a subject authority file (1991) 0.00 
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    Source
    Subject authorities in the online environment: papers from a conference program held in San Francisco, 29.6.1987. Ed.: K.M. Drabenstott
    Type
    a
  9. Chan, L.M.; Vizine-Goetz, D.: Feasibility of a computer-generated subject validation file based on frequency of occurrence of assigned LC Subject Headings (1995) 0.00 
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  10. Chan, L.M.: Dewey 18: another step in an evolutionary step (1972) 0.00 
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  11. Chan, L.M.: ¬The period subdivision in subject headings (1972) 0.00 
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    a
  12. O'Neill, E.T.; Chan, L.M.: FAST - a new approach to controlled subject access (2008) 0.00 
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    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
  13. Chan, L.M.; Vizine-Goetz, D.: Towards a computer-generated subject validation file : feasibility and usefulness (1998) 0.00 
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    Abstract
    Recognition, by libraries, of the need for improved efficiency and reliability in subject authority control in catalogues led to a study of the feasibility of automatically creating a subject heading validation file by scanning the OLUC. The premises were: that although the file would not be axhaustive, it would contain the majority of frequently used headings; and that the predicted level of accurary in the file would be high. A sample file of Library of Congress assigned subject headings, from the OCLC Subject Headings Corrections database was analyzed. Results showed that: the frequency of use varies inversely with the number of headings at a given rrate of use; a small number of headings with high frequencies of use accounts for the majority of total use, while a large proportion shows very low frequency of use; topical headings account for 2/3 of assigned headings; and error and obsolescence rates are both low and are in inverse relationship to the frequency of heading use. Concludes that an automatically generated subject heading validation file is feasible and could serve various purposes, including: verification of subject heading strings constructed by cataloguers; updating of subject headings in catalogue maintenance; and validation of subject headings during retrospective catalogue conversion
    Type
    a
  14. Chan, L.M.: Dewey Decimal classification : organizing the world of knowledge for the world (1997) 0.00 
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    Dewey Decimal Classification: Edition 21 and International perspectives: papers from a workshop presented at the General Conference of the International Deferation of Library Associations and Institutions (IFLA), Beijing, China, August 29, 1996. Ed.: L.M. Chan and J.S. Mitchell
    Type
    a
  15. Chan, L.M.: 'American poetry' but 'Satire, American' : the direct and inverted forms of subject headings containing national adjectives (1973) 0.00 
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  16. Chan, L.M.: Library of Congress Classification as an online retrieval tool : potentials and limitations (1986) 0.00 
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  17. Zeng, M.; Chan, L.M.: Ensuring interoperability among subject vocabularies and knowledge organization schemes : a methodological analysis (2002) 0.00 
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  18. Chan, L.M.; Childress, E.; Dean, R.; O'Neill, E.T.; Vizine-Goetz, D.: ¬A faceted approach to subject data in the Dublin Core metadata record (2001) 0.00 
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    Abstract
    This article describes FAST, the Faceted Application of Subject Terminology, a project at OCLC to make Library of Congress Subject Headings easier to use in Dublin Core metadata by breaking out facets of space, time, and form. Work on FAST can be watched at its web site, http://www.miskatonic.org/library/, which has recent presentations and reports. It is interesting to see facets and Dublin Core combined, though both LCSH and FAST subject headings are beyond what most people making a small faceted classification would want or need.
    Type
    a
  19. Chan, L.M.: Dewey Decimal Classification : Edition 21 and international perspectives. Opening remarks (1997) 0.00 
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    Abstract
    In respect to the nature and quantity of available information, 1876 was a very different world from the one we know in the 1990s. Yet in spite of over a century of changes, the Dewey Decimal Classification (DDC), the system that helped organize a small college library, has grown to one that is helping the whole world organize its vast store of information resources. In this closing session, I would like to summarize some of the major factors that have contributed so far to the Dewey system's success as an information organization tool. I will also discuss ongoing efforts to ensure its viability in the future
    Source
    Dewey Decimal Classification: Edition 21 and international perspectives. Papers from a workshop presented at the General Conference of the International Federation of Library Associations and Institutions (IFLA), Beijing, China, August 29,1996. Ed.: L.M. Chan u. J.S. Mitchell
    Type
    a
  20. Yi, K.; Chan, L.M.: ¬A visualization software tool for Library of Congress Subject Headings (2008) 0.00 
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    Content
    The aim of this study is to develop a software tool, VisuaLCSH, for effective searching, browsing, and maintenance of LCSH. This tool enables visualizing subject headings and hierarchical structures implied and embedded in LCSH. A conceptual framework for converting the hierarchical structure of headings in LCSH to an explicit tree structure is proposed, described, and implemented. The highlights of VisuaLCSH are summarized below: 1) revealing multiple aspects of a heading; 2) normalizing the hierarchical relationships in LCSH; 3) showing multi-level hierarchies in LCSH sub-trees; 4) improving the navigational function of LCSH in retrieval; and 5) enabling the implementation of generic search, i.e., the 'exploding' feature, in searching LCSH.
    Type
    a

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