Carlyle, A.: Matching LCSH and user vocabulary in the library catalog (1989)
0.01
0.010468863 = product of:
0.04187545 = sum of:
0.04187545 = weight(_text_:library in 449) [ClassicSimilarity], result of:
0.04187545 = score(doc=449,freq=6.0), product of:
0.13870415 = queryWeight, product of:
2.6293786 = idf(docFreq=8668, maxDocs=44218)
0.052751686 = queryNorm
0.30190483 = fieldWeight in 449, product of:
2.4494898 = tf(freq=6.0), with freq of:
6.0 = termFreq=6.0
2.6293786 = idf(docFreq=8668, maxDocs=44218)
0.046875 = fieldNorm(doc=449)
0.25 = coord(1/4)
- Abstract
- Central to subject searching is the match between user vocabulary and the headings from Library of Congress Subject-Headings (LCSH) used in a library catalog. This paper evaluates previous matching studies, proposes a detailed list of matching categories, and tests LCSH in a study using these categories. Exact and partial match categories are defined for single LCSH and multiple LCSH matches to user expressions. One no-match category is included. Transaction logs from ORION, UCLA's online Information system, were used to collect user expressions for a comparison of LCSH and user language. Results show that single LCSH headings match user expressions exactly about 47% of the time; that single subject heading matches, including exact matches, comprise 74% of the total; that partial matches, to both single and multiple headings, comprise about 21% of the total; and that no match occurs 5% of the time.