-
Chan, L.M.: Instructional materials used in teaching cataloging and classification (1987)
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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.
- Source
- Cataloging and classification quarterly. 7(1987) no.4, S.131-144
-
Zeng, M.L.; Chan, L.M.: Trends and issues in establishing interoperability among knowledge organization systems (2004)
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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.
-
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)
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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
-
Chan, L.M.: Dewey Decimal classification : organizing the world of knowledge for the world (1997)
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- Source
- 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
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Chan, L.M.: Library of Congress Classification as an online retrieval tool : potentials and limitations (1986)
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-
Chan, L.M.: Cataloging and classification : an introduction (1994)
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-
Chan, L.M.: Immroth's guide to the Library of Congress Classification (1980)
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-
Chan, L.M.: ¬A guide to the Library of Congress Classification (1999)
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-
Chan, L.M.: Dewey Decimal Classification : a practical guide (1996)
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-
Chan, L.M.: Dewey Decimal Classification : Edition 21 and international perspectives. Opening remarks (1997)
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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
-
Chan, L.M.: ¬The principle of uniform heading in descriptive cataloging : ideal and reality (1983)
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- Source
- Cataloging and classification quarterly. 3(1983) no.4, S.19-35
-
Yi, K.; Chan, L.M.: Linking folksonomy to Library of Congress subject headings : an exploratory study (2009)
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- 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.
-
Chan, L.M.; Mitchell, J.S.; Alex, H. (Übers.); Heiner-Freiling, M. (Übers.); Preuss, M. (Übers.): Dewey-Dezimalklassifikation : Theorie und Praxis (2006)
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- Footnote
- Die zunehmende Nutzung der DDC im deutschsprachigen Raum wird in den kommenden Jahren in der bibliothekarischen Ausbildung und Praxis zu einer stärkeren Nachfrage nach Informations- und Unterrichtsmaterialien zu dieser Klassifikation führen. Die deutsche Übersetzung des DDC-Lehrbuchs Dewey Decimal Classification: Principles and Application bietet für Studierende und praktisch mit dem DDC-Klassifizieren und -Recherchieren Arbeitende eine umfassende Einführung in die theoretischen Grundlagen der Klassifikation, ergänzt durch fachliche Aspekte und viele Einzelbeispiele. Der Gebrauch der Hilfstafeln und die Notationssynthesezwei wesentliche Elemente der DDC - werden detailliert erläutert und mit praktischen Übungen vertieft.
-
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)
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-
Chan, L.M.: Alphabetical arrangement and subject collocation in Library of Congress Subject Headings (1977)
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- Abstract
- Beginning with Cutter, theorists of subject headings have conceded that certain elements of systematic arrangement in the dictionary catalog are inevitable; yet the fact that no specific guidelines have ever been developed for the determination of the extent to which subject collocation at the expense of specific and direct entry should be allowed has resulted in the many irregularities and inconsistencies now existing in the LCSH
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Chan, L.M.: ¬The period subdivision in subject headings (1972)
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Chan, L.M.; Vizine-Goetz, D.: Towards a computer-generated subject validation file : feasibility and usefulness (1998)
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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
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Chan, L.M.: Functions of a subject authority file (1991)
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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
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Chan, L.M.: Library of Congress Subject Headings : principles and application (2005)
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- Abstract
- The only comprehensive treatise an the Library of Congress Subject Headings system, now fully updated to address LCSH in the electronic environment.
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Chan, L.M.: 'American poetry' but 'Satire, American' : the direct and inverted forms of subject headings containing national adjectives (1973)
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