Model-Driven and Software Product Line Engineering - Model-Driven and Software Product Line Engineering - page 133

transformation rule. A Workflow must take into account a
set of ExecutionConditions , which depends on a set of
Features with a particular SelectionType , SELECTED or
NOT _ SELECTED . Finally, an Aspect must be woven if its
executionCondition appears in a feature configuration.
Figure 4.18. Decision model including external composition
Creating executable model transformation workflows from
decision models. As we mentioned before, we use the oAW
modeling framework and the Xtend and Xpand model
transformation languages to implement our approach and
application example.We then transformed our decision models
into oAW workflows that include the required instructions (1)
to execute model transformations in different stages (external
composition), and (2) to modify a baseline ordering of a set
of transformation rules (internal composition [WAG 08a]).
For transforming our decision models into oAW workflows,
we created a model-to-text transformation. This model-to-text
transformation is provided at [ARB 12]. We use it in the