Web services technology provides a platform on which we can develop distributed services. The interoperability among these services is achieved by various stan-dard protocols. In recent years, several researches suggested that process algebras provide a satisfactory assistance to the whole process of web services development. Business transactions, on the other hand, involve the coordination and interaction between multiple partners. With the emergence of web services, business trans-actions are conducted using these services. The coordination among the business processes is crucial, so is the handling of faults that can arise at any stage of a transaction. BPEL models the behavior of business process interaction by pro-viding a XML based grammar to describe the control logic required to coordinate the web services participating in a process ?ow. However, BPEL lacks a proper formal description where the composition of business processes cannot be formally veri?ed. Process algebra, on... Это и многое другое вы найдете в книге Web Service Composition (Mohammad Salah Uddin)