Worldwide interoperability of application systems will only work with a standardised description of the services offered by theses application systems. We show that a specification framework that was introduced for the specification of software components can be transfused to fulfil the requirements to specify services in general. The argumentation is based on the theory of acting systems, which establishes generic relationships between actions and agents of actions. Thereby we will expose the similarities of different agents which are the basis for the transferability. For this reason it is possible to describe services all-embracing – from a technical as well from a business-organisational point of view.