Emmanuel Bernard Do you see any reason why that's omitted from the Configuration API? Without it, one cannot do the exact same thing as with validation.xml which I why I think it should be added (one use case being BVAL-581 Open which would allow the container (or our CDI PE) to bootstrap a validator factory based on a file WEB-INF/validation.xml by passing in the contents of that file programmatically, letting the implementation ignore any XML config.