Transformation of Binary Relationships with Particular Multiplicity

The paper deals with one small step in the process of model driven development (MDD) or model driven architecture (MDA) widely used terms nowadays. MDD de nes techniques to develop software systems using variety of models together with a set of transformations. MDD speci es several levels of models depending on abstraction ranging from computation independent models (CIM) to platform independent models (PIM) into platform speci c models (PSM), and implementation speci c models (ISM). Many CASE tools provide automated support for generating more speci c models from more abstract ones e.g. PSM or ISM from PIM. This task is referred to as forward engineering. Many tools also provide automated support for generating more abstract models from more speci c ones e.g. PIM from PSM or ISM. This task is referred to as reverse engineering. Some tools also support round-trip engineering, which involves both forward and reverse engineering steps such that software artifacts (model and code) become synchronized. However, these tools need exact transformation rules to be de ned for such transformations. This paper describes basic principles and restrictions for transformations of binary relationships and transformations of binary relationships with the particular multiplicity from PIM level into PSM level. The idea is illustrated on examples.