Using a Formal Method to Verify the Temporal Semantics of SMIL Documents

Several works have been dedicated to the authoring and presentation of interactive multimedia applications to be distributed over the web, but few of them address semantic verification issues of these documents. This paper presents a formal approach for the design and semantic verification of SMIL documents which relies on the classical reachability analysis performed on RT-LOTOS specifications and on the utilization of a simple scheduling graph. Furthermore, some erroneous semantic interpretations of SMIL documents which are not conformant with the reference behavior expressed by the scheduling graph are illustrated using some currently available SMIL players.