Poo, D.C.C.; Khoo, C.S.G.: Online Catalog Subject Searching (2009)
0.01
0.0072074337 = product of:
0.0216223 = sum of:
0.0111087095 = weight(_text_:information in 3851) [ClassicSimilarity], result of:
0.0111087095 = score(doc=3851,freq=4.0), product of:
0.067498945 = queryWeight, product of:
1.7554779 = idf(docFreq=20772, maxDocs=44218)
0.03845047 = queryNorm
0.16457605 = fieldWeight in 3851, product of:
2.0 = tf(freq=4.0), with freq of:
4.0 = termFreq=4.0
1.7554779 = idf(docFreq=20772, maxDocs=44218)
0.046875 = fieldNorm(doc=3851)
0.010513592 = product of:
0.031540774 = sum of:
0.031540774 = weight(_text_:29 in 3851) [ClassicSimilarity], result of:
0.031540774 = score(doc=3851,freq=2.0), product of:
0.13525672 = queryWeight, product of:
3.5176873 = idf(docFreq=3565, maxDocs=44218)
0.03845047 = queryNorm
0.23319192 = fieldWeight in 3851, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.5176873 = idf(docFreq=3565, maxDocs=44218)
0.046875 = fieldNorm(doc=3851)
0.33333334 = coord(1/3)
0.33333334 = coord(2/6)
- Abstract
- The Online Public Access Catalog (OPAC) is an information retrieval system characterized by short bibliographic records, mainly of books, journals, and audiovisual materials available in a particular library. This, coupled with a Boolean search interface and a heterogeneous user population with diverse needs, presents special problems for subject searching by end users. To perform effective subject searching in the OPAC system requires a wide range of knowledge and skills. Various approaches to improving the OPAC design for subject searching have been proposed and are reviewed in this entry. The trend toward Web-based OPAC interfaces and the developments in Internet and digital library technologies present fresh opportunities for enhancing the effectiveness of the OPAC system for subject searching.
- Date
- 27. 8.2011 14:24:29
- Source
- Encyclopedia of library and information sciences. 3rd ed. Ed.: M.J. Bates
