Example
An ATL program (T1.atl here) will take model Ma.xmi as input and will produce model Mb.xmi as output. Both models may be expressed in the OMG XMI standard. The model Ma conforms to metamodel MMa.km3. Model Mb conforms to metamodel MMb.km3. The KM3 notation is a simple and neutral metamodel specification language.
The ATL program itself (T1.atl here) is also a model, so it conforms to a metamodel (the ATL metamodel) not presented here.
An ATL program is composed of a header, of a set of side-effect free functions called helpers and of a set of rules.
Read more about this topic: ATLAS Transformation Language
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