A BrokenLink is a link which doesn't lead where it should. A wiki can't really have internal BrokenLinks, but we have plenty of URLs pointing outwards. If you do come across a BrokenLink, have a go at fixing it; if you can't, either delete it, or if you feel it's worth keeping and might be fixable by someone else, tag it by writing 'BrokenLink' next to it. That way, we can find all the BrokenLink__s by looking for BackLinks to this page. CategoryWiki