This blog post presents some improvements of the existing features of Acceleo. Acceleo is a pragmatic implementation of the Object Management Group (OMG) MOF Model to Text Language (MTL) standard. You do not need to be an expert to start using the plug-ins and create your first code generator. One of the improvement is the traceability for each line of code of which part of the generation template generated it, and which model element triggered its generation. This feature is intensively used in the UML to Java generator, an open source Eclipse plugin that allows you to generate Java source code from a UML model.