Information Systems (TOIS)


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ACM Transactions on Information Systems (TOIS), Volume 15 Issue 3, July 1997

Experiences with selecting search engines using metasearch
Daniel Dreilinger, Adele E. Howe
Pages: 195-222
DOI: 10.1145/256163.256164
Search engines are among the most useful and high-profile resources on the Internet. The problem of finding information on the Internet has been replaced with the problem of knowing where search engines are, what they are designed to retrieve,...

Data structures for efficient broker implementation
Anthony Tomasic, Luis Gravano, Calvin Lue, Peter Schwarz, Laura Haas
Pages: 223-253
DOI: 10.1145/256163.256165
With the profusion of text databases on the Internet, it is becoming increasingly hard to find the most useful databases for a given query. To attack this problem, several existing and proposed systems employ brokers to direct user queries,...

Modeling word occurrences for the compression of concordances
A. Bookstein, S. T. Klein, T. Raita
Pages: 254-290
DOI: 10.1145/256163.256166
An earlier paper developed a procedure for compressing concordances, assuming that all alements occurred independently. The models introduced in that paper are extended here to take the possiblity of clustering into account. The concordance is...

Recursive hashing functions for n-grams
Jonathan D. Cohen
Pages: 291-320
DOI: 10.1145/256163.256168
Many indexing, retrieval, and comparison methods are based on counting or cataloguing n-grams in streams of symbols. The fastest method of implementing such operations is through the use of hash tables. Rapid hashing of...