GLIMPSE

GLIMPSE

GLIMPSE is a text indexing and retrieval software program originally developed at the University of Arizona by Udi Manber, Sun Wu, and Burra Gopal. A web server version called WebGlimpse is now being maintained under a pay per line licence. Neither project could be considered open source although there are some similarities.

GLIMPSE stands for GLobal IMPlicit SEarch. While many text indexing schemes create quite large indexes (usually around 50% of the size of the original text), a GLIMPSE-created index is only 2-4% of the size of the original text. It takes a great deal of inspiration from Agrep which was also developed at the University of Arizona, but uses a high level index where Agrep parses all the text each time.

The basic algorithm is similar to other text indexing and retrieval engines, except that the text records in the index are huge, consisting of multiple files each. This index is searched using a boolean matching algorithm like most other text indexing and retrieval engines. After one or more of these large text records is matched, then Agrep is used to actually scan for the exact text desired. While this is slower than traditional totally indexed approaches, the advantage of the smaller index is seen to be advantageous to the individual user. This approach would not work particularly well across websites, but would work reasonably well for a single site, or a single workstation. In addition, the smaller index can be created faster than a full index.

External links

* [http://webglimpse.net/ Glimpse and WebGlimpse home page]
* [http://webglimpse.net/pubs/glimpse.pdf Original Glimpse paper] (PDF)


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  • Glimpse — Glimpse, v. t. To catch a glimpse of; to see by glimpses; to have a short or hurried view of. [1913 Webster] Some glimpsing and no perfect sight. Chaucer. [1913 Webster] …   The Collaborative International Dictionary of English

  • Glimpse — Glimpse, n. [For glimse, from the root of glimmer.] [1913 Webster] 1. A sudden flash; transient luster. [1913 Webster] LIght as the lightning glimpse they ran. Milton. [1913 Webster] 2. A short, hurried view; a transitory or fragmentary… …   The Collaborative International Dictionary of English

  • Glimpse — Glimpse, v. i. [imp. & p. p. {Glimpsed}; p. pr. & vb. n. {Glimpsing}.] to appear by glimpses; to catch glimpses. Drayton. [1913 Webster] …   The Collaborative International Dictionary of English

  • glimpse — [n] brief look eye, eyeball*, flash*, gander*, glance, glom*, gun*, impression, lamp*, look see*, peek, peep, quick look, sight, sighting, slant, squint, swivel*; concept 623 Ant. stare glimpse [v] look briefly catch sight of, check out, descry,… …   New thesaurus

  • glimpse — index find (discover), pierce (discern), spy, vision (dream) Burton s Legal Thesaurus. William C. Burton …   Law dictionary

  • glimpse — (v.) c.1400, to glisten, be dazzling, probably from O.E. *glimsian shine faintly, from P.Gmc. *glim (see GLEAM (Cf. gleam)). If so, the intrusive p would be there to ease pronunciation. Sense of catch a quick view first recorded mid 15c. Related …   Etymology dictionary

  • glimpse — n glance, peep, peek, *look, sight, view Contrasted words: surveying or survey, observing or observation, contemplating or contemplation (see corresponding verbs at SEE): scrutiny, examination, inspection (see under SCRUTINIZE) …   New Dictionary of Synonyms

  • glimpse — ► NOUN ▪ a momentary or partial view. ► VERB ▪ see briefly or partially. ORIGIN originally in the sense «shine faintly»: probably Germanic, related to GLIMMER(Cf. ↑glimmering) …   English terms dictionary

  • glimpse — [glimps] vt. glimpsed, glimpsing [ME glimsen (with unhistoric p ) < base of OE glæm (see GLEAM), akin to MHG glimsen, MDu glinsen] to catch a brief, quick view of, as in passing; perceive momentarily and incompletely vi. to look quickly;… …   English World dictionary

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