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Application of Graph Transformation for Automating Web Service Discovery Heckel, Reiko Cherchago, Alexey SOA graph transformation contracts The paper represents current achievements of an ongoing research that aims to develop a formal approach supporting an automatic selection of a Web service sought by a requestor. The approach is based on the matching the requestor’s requirements for a "useful" service against the service description offered by the provider. We focus on the checking behavioral compatibility between operation contracts specifying pre-conditions and effects of required and provided operations. Graph transformation rules with positive application conditions are proposed as a visual formal notation for contracts. The desired dependence between requestor and provider contracts is determined by the semantic compatibility relation and syntactic matching procedure that is sound w.r.t. this relation. Schloss Dagstuhl – Leibniz-Zentrum für Informatik Reiko Heckel and Alexey Cherchago 2005 Is Part Of Dagstuhl Seminar Proceedings, Volume 4101, Language Engineering for Model-Driven Software Development (2005) InProceedings Text doc-type:ResearchArticle publishedVersion application/pdf doi:10.4230/DagSemProc.04101.6 urn:nbn:de:0030-drops-121 https://drops.dagstuhl.de/entities/document/10.4230/DagSemProc.04101.6 eng https://creativecommons.org/licenses/by/4.0/legalcode