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Form subdivisions : their identification and use in LCSH

作者: Edward T O'NeillLois Mai ChanEric ChildressRebecca J DeanLynn M El-Hoshy所有作者
版本/格式:   可下載的文章 : 文獻   電腦資料 : 英語
刊登於:Library resources & technical services (Online) Vol. 45, no. 4 (October 2001)
資料庫:WorldCat
提要:
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  再讀一些...
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資料類型: 文獻, 網際網路資源
文件類型: 網路資源, 文章, 電腦資料
所有的作者/貢獻者: Edward T O'Neill; Lois Mai Chan; Eric Childress; Rebecca J Dean; Lynn M El-Hoshy; Diane Vizine-Goetz; OCLC. Office of Research.
ISSN:2159-9610
OCLC系統控制編碼: 53944050
注意: In: Library Resources & Technical services, Vol. 45, no. 4 (October 2001) p. 187-197.
Author affiliations: Edward T. O'Neill (Online Computer Library Center (OCLC)), Lois Mai Chan (University of Kentucky), Eric Childress (Online Computer Library Center (OCLC)), Rebecca Dean (Online Computer Library Center (OCLC)), Lynn M. El-Hoshy (Library of Congress), and Diane Vizine-Goetz (Online Computer Library Center (OCLC)).
描述: 1 online resource (pages 187-197) : charts
責任: Edward T. O'Neill, Lois Mai Chan, Eric Childress, Rebecca Dean, Lynn M. El-Hoshy, Diane Vizine-Goetz.

摘要:

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 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.

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