Christian, Inside the directx thread you asserted that there are things that ANTLR can do and Spirit can't. This met with some resistance, but I would like to take a different approach. Please post a working code example, along with rationale for why you want to do it, that shows something ANTLR can do, but Spirit can't. The goal is to move this out of the land of unsupported allegations, and into specific examples that can promote specific responses. My experience of Joel and Hartmut suggests that if you have any such real examples, they will use them as a basis for improving Spirit, a process which benefits everyone. If you display examples, and Hartmut and Joel (or anyone else) respond by providing working examples of how Spirit does that, too, then better information is propagated on the list, and again everyone benefits. In general, this is a better way to critique by comparison. Provide actual working code for the comparison, and there is far less room for misinterpretation of intent or conclusions. John