Layer Diagram - Overview
Used to illustrate layerings, i.e. quadratic
Elements of a set thus appear in two different, hierarchically distinct, roles in the relation.
Thus an ordering criterion exists, so that an element can be ordered as a
junior of another element. E.g. if a set consists of routines in a computer program and the relation is "A calls B", routines can assume the role of the caller or the callee.
These masters are part of all stencil sets, not only Layer Diagram.