Formal Approach for the Coherence Control of SMIL Documents

This paper presents a formal approach based on Time Petri net (TPN) for the coherence control of SMIL documents. TPN model has been widely used to specify real time systems. The question addressed by this paper is whether SMIL documents can be easily modelled by TPN model. For this purpose, we show how to translate a specification of a given document SMIL into a TPN. We have extended the TPN model with component concept which is the building block in the translation procedure. The reachability analysis of TPN allows to verify the consistency proprieties of a document. Furthermore, our model can be used to define scheduling policies.