Acceleo

Acceleo is an open-source code generator framework designed for model-driven development. It is part of the Eclipse Modeling Project and implements the OMG's MOFM2T Model to Text standard, providing a template-based approach to generate textual artifacts from models expressed in EMF metamodels such as Ecore and UML.

Users write generator modules in .mtl files. Each module contains templates that map model elements to text. Templates can reference model properties, navigate relationships with OCL expressions, and include control structures like if and for. A typical generation starts from a root model element; the engine applies templates to produce one or more output files.

Acceleo supports multi-file generation, project-aware traceability, and integration with Eclipse tooling. It can be invoked from the Eclipse UI, integrated into build processes via Maven or ANT, and can generate code in languages such as Java, C++, and other textual targets depending on templates. It relies on EMF to load models and metamodels, enabling round-trip or forward-model generation in model-driven development environments.

License and ecosystem: Acceleo is released under the Eclipse Public License and has been maintained as part of the Eclipse EMF ecosystem. It is commonly used to automate code generation from UML, SysML, and other domain models, enabling developers to produce consistent boilerplate and project structure.