“…Research into the automated generation of multimedia presentations has resulted in a number of knowledge-based systems that are able to generate multimedia presentations with minimal or no human intervention. Some of these systems focus on innovative presentation techniques [2,6,7,18,45] that facilitate the synthesis of multimedia documents and plan how to present this material to various users. These approaches are insightful as they model the authoring process from a planning point of view but they are not sufficient for the authoring processes described in Section 2 as their top-down planning approach is too limited for scenarios where neither the individual user requirements nor the requested material can be predicted in advance.…”