Block-oriented system modelling allows to define physically meaningful connection points between logically separated parts of a system. This work presents a class of systems in block oriented structure, which allow to apply a simple way of databased modelling. The definition of the class via a few key properties is given, as well as a suitable identification approach. Afterwards it is shown, that the very common system of a hydraulic motion control with servo pumps fits into this system class and the presented method is applied and verified in a simulation example.