Hydra is a transformation toolkit along the lines of Dragon (Uber), but open source, and with a more advanced type system and other new features. Hydra maps dat

Hydra is a transformation toolkit along the lines of Dragon (Uber), but open source, and with a more advanced type system and other new features. Hydra maps data and schemas between languages in a way which maintains type conformance. It will even map functional programs between selected languages, including parts of its own source code.