How does Epsilon compare to the OMG family of languages?
There are two main differences: First, QVT, OCL and MTL are standards while languages in Epsilon are not. While having standards is arguably a good thing, by not having to conform to standardized specifications, Epsilon provides the agility to experiment with interesting new features and extensions to model management languages, and contribute small bits to advancing the level of understanding in the field. Examples of such interesting and novel features in Epsilon include interactive transformation, tight Java integration, extended properties, and support for transactions. Second, Epsilon provides specialized languages for tasks that are currently not explicitly targeted by the OMG standards. Examples of such tasks include interactive in-place model transformation, model comparison, and model merging.