:82-946360/《PLC200》webAWorkflow-basedWebServiceCompositionSystem()MALin-pingHAOKe-gang:web,。web,。,。。:web;;;web:TP393:AAbstract:Inthiswork,wepresentawebservicecompositionsystemthatprovidesanenvironmentforspecifyingtheflowmodelofthecompositeserviceandtheuser'sconstraintsonthecompositeservice.Weadoptourpreviousworkonworkflowmodelingandschedulingunderresourceallocationconstraintsforwebservicecompositionandextenditwithservicediscoveryfunctionalities.Inmodelingthecompositeservice,thesystemguidestheuserforselectingtherelevantservicetypes.Inbothguidingfunctionalityandtheservicediscoveryphase,ontologybasedsemanticinformationoftheservicesisutilized.Keywords:DynamicWebServiceComposition;ResourceSelection;ConstraintSatisfactionProblem;SemanticWebServices:1008-0570(2009)01-3-0015-021web,web。webweb。。web。webweb。web,。1。。web。。,()。,。,,。。。2,(,,,),UDDI,web,。1。。web(CompositeWebServiceLanguage,CWSL)。CWSL。,。。,,,。。2。。。()。Xor。,,。()。(:,): ! #$ ! %&