From the main Eclipse menu invoke File->Import...
Select Plug-in Development->Plugins and Fragments
Next
The default settings (Import As: binary projects) are adequate
Next
Select org.eclipse.gmt.umlx.qvtr.examples
Add-> then Next
The imported project is a new project and so has no natures.
In order for the QVTc or QVTr builder
to analyze the source files and add error markers it is necessary to use
UMLX Natures->Add QVTcore Nature
or UMLX Natures->Add QVTrelation Nature from the
right button menu of the org.eclipse.gmt.umlx.qvtr.examples
project within Navigator or Package Explorer Views.
In order to view or modify
the (Meta-Model) Registrations it is similarly necessary to use
UMLX Natures->Add Model Registry Nature.
Open qvtr/qvtr2qvt2/Relation2Core.qvtr.
The contents will be shown highlighted, and since this transformation is work in progress a number of meta-model compliance errors are also shown.
The examples have been changed fractionally to resolve incompatibilities with the Ballot 3 QVT syntax.
Duplication of meta-models has been reduced by moving all meta-models to the root folder of each example.
The DNF example has two errors becuase it makes use of an unspecified and undefined ID property.