OOHyTime from the time-based point of view: the case of synchronization specification in multimedia documents

HyTime is an ISO standard for the formal specification of the structure of interchangeable documents. OOHyTime has been proposed as an object-oriented view of the standard, with the aim of facilitating both its understanding and use. Initially, this paper introduces HyTime and OOHyTime and follows with details of the OOHyTime view of the modules Measurement and Scheduling, which allow the specification of temporal and spatial relations. Next, the corresponding OOHyTime model for constructors of those HyTime modules that are needed to provide the specification of temporal relations relevant to the process of multimedia synchronization. The usage of the presented work in the context of the World Wide Web is also discussed.