I hadn't heard of Maude before, thanks! For those interested in this kind of thing, another well-known term-rewriting language is Pure (http://purelang.bitbucke

I hadn't heard of Maude before, thanks! For those interested in this kind of thing, another well-known term-rewriting language is Pure (http://purelang.bitbucket.org/ http://purelang.bitbucket.org/), which grew out of an earlier project called Q (http://q-lang.sourceforge.net/ http://q-lang.sourceforge.net/).