With the prevalence of service-oriented architecture (SOA),web services have become the dominat-ing technology to construct workflow systems.As a workflow is the composition of a series of interrelatedweb services which realize its activities,the interoperability of workflows can be treated as the composi-tion of web services.To address it,a framework for interoperability of business process execution lan-guage (BPEL)-based workflows is presented,which can perform three phases,that is,transformation,conformance test and execution.The core components of the framework are proposed,especially howthese components promote interoperability.In particular,dynamic binding and re-composition of work-flows in terms of web service testing are presented.Besides,an example of business-to-business (B2B)collaboration is provided to illustrate how to perform composition and conformance test.
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