Document (#4828)

Author

Wittan, I.H.
Bell, T.C.
Nevill, C.G.

Title

Indexing and compressing full-text databases for CD-ROM

Source

Journal of information science. 17(1991) no.5, S.265-271

Year

1991

Abstract

CD-ROM is an attractive delivery vehicle for full text databases. Large storage capacity and low access speed, carefully designed indexing structures, including a concordance, are necessary to enable the text to be retrieved efficiently. However, the indexes are sufficiently large that they tax the ability of the main store to hold them when processing queries. The use of compression techniques can substantially increase the volume of text that a disc can accomodate, and substantially decrease the amount of primary storage needed to hold the indexes. Describes a suitable indexing mechanism, and its compression potential using modern compression methods. It is possible to double the amount of text that can be stored on a CD-ROM disc and include a full concordance and indexes as well

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