The Scene Description Language is intended to describe a scene. It is not meant for interaction. When Autodesk created SDL, the most important consideration was its ability to clearly and succinctly describe a scene. This includes sufficient scope to describe all aspects of a scene.
In addition, SDL had to be
The above considerations argued for a language rich in nouns and adjectives, with fewer verbs. In terms of computer language design, that means many data types with many optional modifiers and relatively few operations. The bulk of this document, therefore, deals with data.
