In: Angewandte Informatik, No. 7, pages 296-304. 1987. In German.
Abstract: This paper presents elements of a computer language and the resulting semantic conditions via nets. Especially in the field of real-time data processing it is of vast importance to take into account the condition of the general system environment. PEARL is a computer language which has been developed for real-time programming, whereas Petri nets are especially suited to discern system conditions in an overview.