Application Development is moving from monolithic systems towards distributed architectures based on middleware technologies such as Web Services. Such a kind of application requires a sophisticated monitoring framework that provides information on all levels from hardware over network up to the application level. Existing monitoring solutions do not provide such an integrated view. The GeneSyS IST project (IST-2001-34162) aims at the specification and development of such a framework. The basic concepts developed so far are presented within this position paper.