QVT13 — QVTo: Standard Library mode and namespace

The QVTo Standard Library has no model and consequently no namespace.

This encourages a major confusion:

The QVToLib::Model and QVToLib::Transformation types used in the QVTo Standard Library are at a different meta-level to UML::Model and QVTbase::Transformation. We have the uncomfortable situation that a QVToLib::Model is an instance of a QVTbase::TypedModel and a QVToLib::Transformation is an instance of a QVTbase::Transformation.

As a minimum the distinct namespaces should be identified and modeled.

Possibly QVToLib::Model and QVToLib::Transformation should be renamed. Since they have no namespace they are currently unuseable in code; their sole purpose is for specification of implementation behavior.

QVTo Standard Library mode and namespace

The QVTo Standard Library has no model and consequently no namespace.

This encourages a major confusion:

The QVToLib::Model and QVToLib::Transformation types used in the QVTo Standard Library are at a different meta-level to UML::Model and QVTbase::Transformation. We have the uncomfortable situation that a QVToLib::Model is an instance of a QVTbase::TypedModel and a QVToLib::Transformation is an instance of a QVTbase::Transformation.

As a minimum the distinct namespaces should be identified and modeled.

Possibly QVToLib::Model and QVToLib::Transformation should be renamed. Since they have no namespace they are currently unuseable in code; their sole purpose is for specification of implementation behavior.

Discussion

It is difficult to make sensible progress until the OCL work in progress modeling libraries provides the solution.