Document (#1147)

Author

Chan, L.M.

Title

Library of Congress class numbers in online catalog searching

Source

RQ. 28(1989), S.530-536

Year

1989

Abstract

In addition to using title keywords and subject headings for searching in the online catalog, the searcher may also use class numbers as access points. Library of Congress class or call numbers are particular effective in certain kinds of specific-item subject searching and serve as supplements to keywords and descriptors, improving precision and recall. Class number searching in the database can produce unique results because these numbers collect citations in ways that differ from those of keywords and descriptors

Theme

Klassifikationssysteme im Online-Retrieval

Object

LCC

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