Success of Web services mainly depends on the availability of tools facilitating usage of technology within the addressed B2B integration problems. One severe problem in loosely coupled systems is service discovery including a sufficient matchmaking definition. The concept for service discovery in web service architecture is UDDI providing limited querying functionality and not being capable to deal with the multiple dimensions of a service, like for example semantic, workflow, or Quality of Service aspects. The IPSI Process Finder (IPSI-PF) realizes service discovery by extending the capabilities of UDDI by matchmaking of service descriptions. The extension is realized such that an integration of additional extensions can be added quite easily.