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The Computer Journal 2000 43(5):364-385; doi:10.1093/comjnl/43.5.364
© 2000 by British Computer Society
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Data Visualization Operators for Whoweda

Sourav S. Bhowmick1, Sanjay Madria2, Wee Keong Ng1 and Ee-Peng Lim1

1 Centre for Advanced Information Systems, School of Applied Science, Nanyang Technological University, Singapore 639798 2 Department of Computer Science, University of Missouri, Rolla, MO 65409, USA Email: madrias@umr.edu 3 A shorter version of this paper appeared in Data Warehousing and Data Mining Workshop held in conjunction with ER'98.

The effective representation and manipulation of web data is currently an active area of research in databases. In a data warehouse specially designed for web information, web information coupling provides the means to derive useful information from the WWW. Web information is materialized in the form of web tuples and stored in web tables. In this paper, we discuss web data visualization operators such as web nest, web unnest, web coalesce, web expand, web pack, web unpack and web sort in the context of our web warehousing system called WHOWEDA (Warehouse of Web Data) to provide users with the flexibility to view sets of web documents in perspectives which may be more meaningful.

Received 7 July, 1999. Revised 29 May, 2000.


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