Oh hurrah, I think that link is what I've been looking for for nearly a decade. I ran across it, or something like it, a long time ago and could never find it again. I don't remember all the special syntax, I think the one I found was written more in plain English with more examples (and I don't think the one I found back then mentioned ghoti either), but can't be sure it's been so long - maybe it was just that page and I don't remember it. It does have around the same number of rules I remember though.