Type of Document	Dissertation
Author	Ouzzani, Mourad
URN	etd-04272004-124255
Title	Efficient Delivery of Web Services
Degree	PhD
Department	Computer Science
Advisory Committee	Advisor Name Title Bouguettaya, Athman Committee Chair Barkhi, Reza Committee Member Chen, Ing-Ray Committee Member Fox, Edward Alan Committee Member Ramakrishnan, Naren Committee Member
Keywords	Web Databases Query Optimization Semantic Web Web Services
Date of Defense	2004-01-16
Availability	unrestricted
Abstract This dissertation addresses issues for the efficient access to Web databases and services. We propose a distributed ontology for a meaningful organization of and efficient access to Web databases. Next, we dedicate most of our work on presenting a comprehensive query infrastructure for the emerging concept of Web services. The core of this query infrastructure is to enable the efficient delivery of Web services based on the concept of Quality of Web Service. Treating Web services as first class objects is a fundamental step towards achieving the envisioned Semantic Web. Semantics-aware processing of information requires intensive use of Web services. In our research, we propose a new query model where queries are resolved by combining Web service invocations. To efficiently deploy such scheme, we propose an optimization strategy based on aggregating Quality of Web service (QoWS) of different Web services. QoWS is adjusted through a dynamic rating scheme and multilevel matching. Web service rating provides an assessment of their behavior. The multilevel matching allows a larger solution space by enabling similar and partial answers.
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