COLLABORATIVE HYPERDOCUMENTS AND PROTOTYPING GROUPWARE

In this paper we informally explain a new Trellis model that incorpora tes colored tokens into the previously-described timed-Petri-net-based definition. We give examples of using Trellis to define protocols for Computer Supported Cooperative Work (CSCW). We then explain an intere sting analog to procedure call we have developed for subdocument invoc ation in collaborative hyper-documents. Trellis prototype implementati ons are based around a client-server architecture and interpret their specifications. Consequently they provide an environment for the rapid prototyping and incremental development of multi-user distributed pro tocols, and for groupware based on such protocols.