No abstract

Service modeling is an important step in designing serviceoriented systems. There are multiple levels of design because service science includes both the business rationale and the IT implementation of the services. As business and IT perspectives differ, the modeling techniques are different, and often the respective modeling languages are disconnected or ad-hoc. We propose a new service-modeling approach for connecting the business modeling and the web service modeling by presenting these two perspectives in a single model. We present a multistage modeling process for capturing different perspectives and creating models iteratively by working with levels of abstraction from higher to lower. The model is then used as an input in order to generate a REST API specification in the OpenAPI format to feed the next stages of the service life-cycle.