1. A system for generating an enhancement of an ontology, the system comprising: a memory unit configured to provide the ontology and to store the ontology with the enhancement; and a processing unit configured to: identify a service specification being represented by a class of the ontology, the service specification describing a capability of a service, compute a set of instances that are specified by the service specification and by a requirement specification, enhance the ontology with a generated class representing the set of instances, wherein the generated class represents a condition part of a selection rule, and generate an action part of the selection rule using an identification of the service so that a relation between the generated class and the service is represented by the selection rule.