CaptSolo: see also issue wiki page
karlcow: "I have written a set of four plugins (parser/meta.py, action/metasearch.py, macro/MetaSearch.py, macro/BrowseMeta.py) to implement facet browsing, tagging, and meta search in MoinMoin 1.3. I use the syntax for tagging"
ldodds: Assembling a list of bots being used by semweb folk, ideally with semweb smarts built-in