Semantic cache mechanism for heterogeneous Web querying

In Web-based searching systems that access distributed information provider s, efficient query processing requires an advanced caching mechanism to red uce the query response time. The keyword-based querying is often the only w ay to retrieve data from Web providers, and therefore standard page-based a nd tuple-based caching mechanisms turn out to be improper for such a task. In this work, we develop a mechanism for efficient caching of Web queries a nd the answers received from heterogeneous Web providers. We also report re sults of experiments and show how the caching mechanism is implemented in t he Knowledge Broker system. (C) 1999 Published by Elsevier Science B.V. All rights reserved.