Applications require access to multiple information sources and the data of other applications. WSDL-based web services are becoming a popular way of making information sources available on the web and, hence, to applications that need to consume them – often via data integration systems that combine the data of multiple sources. We argue that the function signature paradigm that is used today by web services cannot capture the query capabilities provided by structurally rich and functionally powerful information sources, such as relational databases. We propose the Query Set Specification Language (QSSL) that allows the concise description of sets of parameterized XPath queries. A QSS is embedded in a WSDL specification to form a specialized type of web services, called Data Services. Data Services connect the calls that the source accepts with the underlying schema. QSSL will be enhanced to describe subsets of XQuery expressions beyond XPath ones.
The authors of these documents have submitted their reports to this technical report series for the purpose of non-commercial dissemination of scientific work. The reports are copyrighted by the authors, and their existence in electronic format does not imply that the authors have relinquished any rights. You may copy a report for scholarly, non-commercial purposes, such as research or instruction, provided that you agree to respect the author's copyright. For information concerning the use of this document for other than research or instructional purposes, contact the authors. Other information concerning this technical report series can be obtained from the Computer Science and Engineering Department at the University of California at San Diego, firstname.lastname@example.org.
[ Search ]