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Form subdivisions : their identification and use in LCSH

著者: Edward T O'NeillLois Mai ChanEric ChildressRebecca J DeanLynn M El-Hoshyすべての著者
エディション/フォーマット:   ダウンロード可能な記事/論文 : Document   コンピューターファイル : English
出版:Library resources & technical services (Online) Vol. 45, no. 4 (October 2001)
データベース:WorldCat
概要:
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  続きを読む
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資料の種類: Document, インターネット資料
ドキュメントの種類: インターネットリソース, 記事, コンピューターファイル
すべての著者/寄与者: 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 No.: 53944050
注記: 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)).
物理形態: 1 online resource (pages 187-197) : charts
責任者: Edward T. O'Neill, Lois Mai Chan, Eric Childress, Rebecca Dean, Lynn M. El-Hoshy, Diane Vizine-Goetz.

概要:

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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