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XML Query Evaluation in Validation and Monitoring of Web Service Interface Contracts
Abstract
Web service interface contracts define constraints on the patterns of XML messages exchanged between cooperating peers. The authors provide a translation between Linear Temporal Logic (LTL) and a subset of the XML Query Language XQuery, and show that an efficient validation of LTL formulæ can be achieved through the evaluation of XQuery expressions on message traces. Moreover, the runtime monitoring of interface constraints is possible by feeding the trace of messages to a streaming XQuery processor. This shows how advanced XML query processing technologies can be leveraged to perform trace validation and runtime monitoring in web service production environments.
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