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  • × author_ss:"Chan, L.M."
  1. Chan, L.M.: Library of Congress Subject Headings : principles and application (1995) 0.04 
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    Date
    25.11.2005 18:37:22
  2. Chan, L.M.: Immroth's guide to the Library of Congress Classification (1980) 0.03 
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    Series
    Library science text series
  3. 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) 0.03 
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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
  4. Yi, K.; Chan, L.M.: Revisiting the syntactical and structural analysis of Library of Congress Subject Headings for the digital environment (2010) 0.03 
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    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.
    Source
    Journal of the American Society for Information Science and Technology. 61(2010) no.4, S.677-687
  5. Chan, L.M.; Comaroni, J.P.; Satija, M.P.: Dewey Decimal Classification : a practical guide (1994) 0.03 
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    Abstract
    Introduction to the methods of classifying and arranging library collections according to the DDC. It begins with a brief history of the DDC, followed by discussions, the methods of analyzing the subject content of documents to be classed, and the proper procedures of assigning class number. Its essential aims is to explain the proper methods of applying the DDC schedules, of locating and assigning the appropriate class number, and of synthesizing a class number if need be. Examples and exercises are based on ed. 20
    Footnote
    Rez. in: Herald of library science 34(1995) nos.1/2, S.102 (P.N. Kaula); Library resources and technical services 40(1996) no.1, S.99-101 (S.J. Smith)
  6. Chan, L.M.; Hodges, T.: Entering the millennium : a new century for LCSH (2000) 0.03 
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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
    Source
    The LCSH century: one hundred years with the Library of Congress Subject Headings system. Ed.: A.T.Stone
  7. Chan, L.M.; Hodges, T.L.: Library of Congress Classification (LCC) (2009) 0.03 
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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
    Source
    Encyclopedia of library and information sciences. 3rd ed. Ed.: M.J. Bates
  8. Chan, L.M.: ¬A guide to the Library of Congress Classification (1999) 0.03 
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    Series
    Library science text series
  9. Chan, L.M.: Instructional materials used in teaching cataloging and classification (1987) 0.02 
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    Abstract
    An informal survey was conducted for the purpose of identifying instructional materials used in teaching cataloging and classification in library and information science programs in the United States and Canada. Based on responses from instructors in these areas, three groups of instructional materials were identified: cataloging and classification tools, textbooks, and background and supplementary reading materials.
  10. Zeng, M.L.; Chan, L.M.: Trends and issues in establishing interoperability among knowledge organization systems (2004) 0.02 
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    Abstract
    This report analyzes the methodologies used in establishing interoperability among knowledge organization systems (KOS) such as controlled vocabularies and classification schemes that present the organized interpretation of knowledge structures. The development and trends of KOS are discussed with reference to the online era and the Internet era. Selected current projects and activities addressing KOS interoperability issues are reviewed in terms of the languages and structures involved. The methodological analysis encompasses both conventional and new methods that have proven to be widely accepted, including derivation/modeling, translation/adaptation, satellite and leaf node linking, direct mapping, co-occurrence mapping, switching, linking through a temporary union list, and linking through a thesaurus server protocol. Methods used in link storage and management, as weIl as common issues regarding mapping and methodological options, are also presented. It is concluded that interoperability of KOS is an unavoidable issue and process in today's networked environment. There have been and will be many multilingual products and services, with many involving various structured systems. Results from recent efforts are encouraging.
    Source
    Journal of the American Society for Information Science and technology. 55(2004) no.5, S.377-395
  11. Chan, L.M.; Mitchell, J.S.: Dewey Decimal Classification : principles and applications (2003) 0.02 
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    Object
    DDC-22
  12. Chan, L.M.: Library of Congress Subject Headings : Principles of structure and policies for application (1990) 0.01 
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    Editor
    Library of Congress / Cataloging Distribution Service
    Imprint
    Washington : Library of Congress
  13. 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) 0.01 
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    Source
    Annual review of OCLC research. 1995, S.46-50
  14. Chan, L.M.; Vizine-Goetz, D.: Towards a computer-generated subject validation file : feasibility and usefulness (1998) 0.01 
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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
  15. 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 
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    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
  16. Chan, L.M.; Hodges, T.L.: ¬The Library of Congress Classification (2000) 0.01 
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    Source
    The future of classification. Ed. R. Marcella u. A. Maltby
  17. Chan, L.M.; Hodges, T.: Subject cataloguing and classification : the late 1980s and beyond (1990) 0.01 
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    Abstract
    The chapter deals with methods of subject cataloguing, subject analysis and representation of library materials and outlines the practice of subject searching in library catalogs after the introduction of online catalogs. The vocabulary control methods in the Library of Congress Classification and LCSH are described and strategies for the use of theses systems in online retrieval situations are outlined
  18. Chan, L.M.: ¬The principle of uniform heading in descriptive cataloging : ideal and reality (1983) 0.01 
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    Abstract
    The principle of uniform heading underlies the rules for headings in descriptive cataloging in the American tradition. The rationale and the evolution of the principle are examined and its implications discussed in terms of the history of cataloging codes. The ideal embodied in the principle of uniform heading has been undergoing gradual modification in recent codes and considerably compromised in cataloging practice today.
  19. Chan, L.M.: ¬The Library of Congress Classification System in an online environment (1990) 0.01 
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    Abstract
    Advantages and disadvantages of on-line classification access are presented with special attention to Library of Congress Classification (LCC) features for subject browsing, known item-searching, enhancement of keyword and controlled vocabulary searching, and other unique retrieval capabilities.
    Footnote
    Paper presented at the 2nd Annette Lewis Phinazee Symposium on Classification as an enhancement of intellectual access to information in an online environment, held at the School of Library and Information Sciences, North Carolina Central University, Durham, North Carolina.
  20. O'Neill, E.T.; Chan, L.M.: FAST - a new approach to controlled subject access (2008) 0.01 
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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.
    Source
    New pespectives on subject indexing and classification: essays in honour of Magda Heiner-Freiling. Red.: K. Knull-Schlomann, u.a

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