> People need to be able to go gradually.
Yeah, tried that before. See [1] (Template:Tag). But that would be
quite the kludge. There are plenty of ways to change the category
system. What should come first is either a dicatorial decree or - if
it must - a vote/!vote for switching systems.
If that is decided a bot could easily be run to write a flattened
category list onto every category page. That list would have to be
manually reviewed for goofs like Aryeh pointed out.
Furthermore we'd have to blacklist every category that does not
describe a singular concept. Can be done using templates that are
manually set and read out by bots.
(abbreviated) example:
Category:Churches in Guernsey
would get a template on its category page with all the categories that
occur somewhere above "Category:Churches in Guernsey" in the tree:
Category:Churches in Normandy
Category:Religious_buildings_in_Guernsey
Category:Religious buildings in Normandy
Category:Buildings in Guernsey
Category:Guernsey
Category:Religion in Guernsey
Category:Buildings in Normandy
Category:Architecture of Normandy
Category:Normandy
Category:Architecture of Europe
Category:Provinces of France
Category:Provinces
Category:History of France
Category:History
Category:History of Europe by country
Category:France
...
A ginormous list. However every blacklisted category could already be
filtered out! Leaving us with
Category:Guernsey
Category:Normandy
Category:Provinces
Category:History
Category:France
...
Well Category:Churches better be in there somewhere ;-). Anyhow that
list will be much shorter now, and users can weed out nonsense
categories like the abstract Category:History and Category:Provinces
quickly. A bot could then recategorize all images in the reviewed
category.
[1]
http://commons.wikimedia.org/w/index.php?title=Special:Undelete&target=…