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Form subdivisions : their identification and use in LCSH

Autore: Edward T O'NeillLois Mai ChanEric ChildressRebecca J DeanLynn M El-HoshyTutti gli autori
Edizione/Formato:   Articolo scaricabile : Document   Computer File : English
Pubblicazione:Library resources & technical services (Online) Vol. 45, no. 4 (October 2001)
Banca dati:WorldCat
Sommario:
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  Per saperne di più…
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Tipo materiale: Document, Risorsa internet
Tipo documento: Internet Resource, Article, Computer File
Tutti gli autori / Collaboratori: 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
Numero OCLC: 53944050
Note: 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)).
Descrizione: 1 online resource (pages 187-197) : charts
Responsabilità: Edward T. O'Neill, Lois Mai Chan, Eric Childress, Rebecca Dean, Lynn M. El-Hoshy, Diane Vizine-Goetz.

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 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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