Made a start at adding subcategories to CGI::Wiki::Plugin::Categoriser - but oh dear, it's all so horribly kludgey. I'm trying to stick with the wiki conventions of doing categories, yet trying to "do them properly" at the same time, and it just feels like a mess. I need them, though, to make the specialised food search for OpenGuides. Guess I'll just plug on with it; it's kind of an ugly module to start with anyhow.