@RocketMan, the parsers don’t emit a RAML domain document (after expansion), indeed. Currently there is nothing that does this completely. But rest assured, the team from MuleSoft is working on it.
The API Modeling Framework (AMF), which includes parser for RAML as well, will help with exactly what you need. So stay tuned for more news on their side.
In the meanwhile, go check out https://github.com/raml-org/api-modeling-framework. It’s a preview of some capabilities of AMF.