In: Rozenberg, G.: Lecture Notes in Computer Science, Vol. 340: Advances in Petri Nets 1988, pages 249-265. Springer-Verlag, 1988.
Abstract: In the paper a proposal of schematic representation of natural language sentences is made. The basis for such representation is the theory of Petri Nets. It is the intention of this paper to show how some tenses and modalities can be expressed by nets and how they can be compared and differentiated by net methods.