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

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Object: DDC-22

Chan, L.M.: Library of Congress Subject Headings : principles and application (1995) 0.01

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Date: 25.11.2005 18:37:22

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

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

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Date: 27. 5.2001 16:22:21

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) 0.01

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Date: 10. 9.2000 17:38:22

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

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Date: 27. 8.2011 14:22:42

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