Sharma Chakravarthy
ABSTRACT
The World Wide Web is an omni-present and an ever-expanding source of data. Data on the web is constantly increasing and changing. Many a times, users are interested in specific changes to the data on the web. Currently, in order to detect changes of interest, users have to poll the pages periodically and check for the changes of interest. WebVigiL is a general-purpose information monitoring and notification system. It handles the specification, intelligent fetch, detection, and propagation of changes as requested by a user while meeting the quality of service requirements. We use the active capability in the form of event-condition-action (ECA) rules, and a combination of push/pull paradigm for change monitoring. In this paper, we present an overview of the specification language and the run time management of sentinels. We discuss in detail the use of ECA rules for fetching and the adaptive learning algorithm used for fetching pages. We conclude with the implementation status of WebVigiL.
- Jacob, J, A. Sachde, and S. Chakravarthy, CX-Diff: A Change Detection Algorithm for XML Content and Change Presentation Issues in WebVigiL, in the Proc. of XSDM Workshop, Chicago, 2003, pp. 273--284.Google Scholar
- Jacob, J., et al., WebVigiL: An approach to Just-In-Time Information Propagation In Large Network-Centric Environments, in Web Dynamics Book. 2003, Springer-Verlag, 2004.Google Scholar
- Changedetection, http://www.changedetection.com.Google Scholar
- Douglis, F., et al., The AT&T Internet Difference Engine: Tracking and Viewing Changes on the Web, in World Wide Web. 1998, Baltzer Science Publishers. p. 27--44. Google ScholarDigital Library
- Bhowmick, S., et al. Detecting and Representing Relevant Web Deltas Using Web Join. in the Proc of ICDCS, 2000. Google ScholarDigital Library
- Mind-it, http://www.netmind.com/.Google Scholar
- Liu, L., et al. Information Monitoring on the Web: A Scalable Solution. in the Int'l Journal of World Wide Web, 2002. Google ScholarDigital Library
- Xyleme, http://www.xyleme.com/.Google Scholar
- Nguyen, B., et al. Monitoring XML Data on the Web. in the Proc. of ACM SIGMOD, 2001. Google ScholarDigital Library
- Chakravarthy, S. and D. Mishra, Snoop: An Expressive Event Specification Language for Active Databases. Data and Knowledge Engineering, 1994. 14(10): p. 1--26. Google ScholarDigital Library
- Anwar, E., L. Maugis, and S. Chakravarthy, A New Perspective on Rule Support for Object-Oriented Databases, in the Proc. of ACM SIGMOD, 1993, p. 99--108. Google ScholarDigital Library
- Pandrangi, N., et al. WebVigiL: User Profile-Based Change Detection for HTML/XML Documents, in the Proc. of BNCOD, Coventry, UK, 2003, pp. 38--55. Google ScholarDigital Library
- Deolasee, P, et al. Adaptive Push-Pull: Disseminating Dynamic Web Data. in the Proc. of WWW Conference. 2001. Hong Kong. Google ScholarDigital Library
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