AbstractInteractive videodisc technology is likely to have a significant impact upon many aspects of education and training. However, before this medium can be effectively utilized considerable attention must be given to overcoming the present problems associated with courseware authoring. Solutions to these problems are to be found in the provision of suitable courseware development aids. In particular, there is a requirement for a powerful and easy‐to‐use author language. This paper describes the approach used by the PHILVAS authoring sys