The SML Language for Structured Modeling: Levels 3 and 4
Abstract
This is the second of two articles on the principal features of SML, a language for expressing structured models. The prior article covered levels 1 and 2. The present article covers the remaining levels, with special attention to the characteristics of SML that, collectively, make it unique. The intended audience includes evaluators of other modeling languages, designers of modeling languages and systems, and those following the development of structured modeling.

