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Pi-Web Join in a Web Warehouse
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Sourav S. Bhowmick,
Sanjay K. Madria,
Wee-Keong Ng, and
Ee-Peng Lim
View Paper (PDF)
Return to Session 5A: Data Warehousing
With the enormous amount of data stored in
the World Wide Web, it is increasingly important to design and develop powerful web
warehousing tools. The key objective of our web warehousing project, called WHOWEDA
(Warehouse of Web Data), is to design and implement a web warehouse that
materializes and manages useful information from the Web.
In this paper, we
introduce the concept of Pi-web join in the context of WHOWEDA. Pi-web join
operator is a web information manipulation operator to combine relevant web
information residing in two web tables. Informally, it is the combination of
web join and web project operators which filter out irrelevant information from a
joined web table. In this paper, we show how to construct the Pi-joined web table
and its schema. We also highlight the benefits of the Pi-web join operator.
Copyright(C) 2000 ACM
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