Are the XPath grammars proprietary in any way?

[wendellpiez]

Users and experimenters sometimes need to know what the IP restrictions apply to the grammars (if any are applicable: I am not a lawyer), which are excellent resources in their own right, available on the jwiXML demo page but not (as far as I can see) distributed independently (in the repo or elsewhere).

I have scraped a couple of these as fair game for development and testing purposes (with their sources duly noted), but would be most happy for assurances that I am not infringing in doing so. Specifically my interest is in the XPath grammars but in principle the same question might apply to any example.

Should the XPath (or other) grammars have a small disclaimer/license comment? Can they be available as a separate download?