Searching the World Wide Web-Reference-Cited by-同舟云学术

Searching the World Wide Web

Published:1998-04-03 Issue:5360 Volume:280 Page:98-100
ISSN:0036-8075
Container-title:Science
language:en
Short-container-title:Science

Author:

Lawrence Steve¹,Giles C. Lee¹

Affiliation:

1. Computer Science, NEC Research Institute, 4 Independence Way, Princeton, NJ 08540, USA.(S.L.) or (C.L.G.)

Abstract

The coverage and recency of the major World Wide Web search engines was analyzed, yielding some surprising results. The coverage of any one engine is significantly limited: No single engine indexes more than about one-third of the “indexable Web,” the coverage of the six engines investigated varies by an order of magnitude, and combining the results of the six engines yields about 3.5 times as many documents on average as compared with the results from only one engine. Analysis of the overlap between pairs of engines gives an estimated lower bound on the size of the indexable Web of 320 million pages.

Publisher

American Association for the Advancement of Science (AAAS)

Subject

Multidisciplinary

Reference20 articles.

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2. Barrie J. M., Presti D. E., Science274, 371 (1996).

3. Taubes G., ibid271, 764 (1996).

4. P. T. Fox and J. L. Lancaster ibid. 266 994 (1994).

5. B. R. Schatz ibid. 275 327 (1997).

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