A very important feature of this generic textual syntax is the contribution concept. It allows us to contribute to an element defined elsewhere.

For example, I can define in a first model fragment a new feature for Intent, called synchronizer. Here I just want to give a very high-level overview of the synchronization mechanism. So I just say that it is not an UI Feature, and that it is implemented by some java class.

In another section, that could be located before or after this definition, I contribute to the definition of my Intent feature by adding technical considerations (for example that the Synchronization is delegated to a Job).