+>>>> I see; at least, your response is encouraging (that it's not hard). I could even find some work that can give similar features: [[structured page data#another_kind_of_links]] -- they envisage a pagespec like `data_link(Depends on,bugs/bugA)`, thus a "separation of dependencies between bugs from arbitrary links". Indeed, having many relations that can be used in the formulas defining classes of objects (like pagespecs here) is a common thing, so this would be a nice feature. (I'll be trying out the patches there first, probably.) In general, extending the language of pagespecs to something more powerful (like [[!wikipedia description logics]]) seems to be a nice possible feature. I saw a discussion of similar ideas about the extension of the pagespec language somewhere here. --Ivan Z.