Wei, M.; Xu, L.: Boolean mapping algorithms across heterogeneous information sources (1998)
0.00
0.001330559 = product of:
0.011975031 = sum of:
0.011975031 = weight(_text_:of in 3293) [ClassicSimilarity], result of:
0.011975031 = score(doc=3293,freq=4.0), product of:
0.061262865 = queryWeight, product of:
1.5637573 = idf(docFreq=25162, maxDocs=44218)
0.03917671 = queryNorm
0.19546966 = fieldWeight in 3293, product of:
2.0 = tf(freq=4.0), with freq of:
4.0 = termFreq=4.0
1.5637573 = idf(docFreq=25162, maxDocs=44218)
0.0625 = fieldNorm(doc=3293)
0.11111111 = coord(1/9)
- Abstract
- Notes the difficulties of searching over heterogeneous information sources where query languages are not unifrom. Presents a model where Boolean queries are composed in one rich front end language. For each query and target source, the query is transformed into a subsuming query that can be supported by the source but may return extra documents. The results are then processed by a filter query to yield the correct results
- Source
- Journal of the China Society for Scientific and Technical Information. 17(1998) no.3, S.185-189