PIM --> transformation --> PSM --> transformation --> Code

PIM: Platform independent model, which describes the system froma business perspective

PSM: platform specific model, specifies the system in terms of constructs available in a specific implementation technology

A transformation is the automatic generation of a target model from a source model according to some transformation definition.

A transformation definition is a set of transformation rules

A transformation rule defines how one or more constructs in the source language can be transformed into one or more constructs in the target language.

Is typically a one-shot modelling approach: straight from model/specs to code. No complex chains of refinement, no model-to-model transformations. Gaining a lot of traction

Advantages
- clearer message than model drive/based
- no complex chains of refinement or transformations
- more modelling expertise
- technology ismore mature
- benefits more clear