folksonomy: free-tagging instead of single categories per URL

[naught101]

Folksonomy is one of the best ways to use crowd-sourced intelligence to build up a useful categorisation system. It would be super cool if PeARS supported this.

I think the requirements would be:

1. Allow multiple categories per URL. This could be as simple as changing the categories input to a comma-separated values list, and tweaking the auto-complete to match.
2. Allow relationships to be build between categories. This would involve editable category pages, with the ability to bi-directionally link categories (or perhaps just have a "parent categories" field that's the same as the multiple-category field on URLs - note that recursive loops in category systems like this are completely fine, as long as you're aware of that possibility while building interfaces).
3. Allow users to suggest changes to categories for URLs and category - this is important to allow categories to be split up finer and finer as more information gets added to the system.

The second part and 3rd parts could definitely come later, the first part would be useful immediately, IMO.