[marcosdumay]

Yeah, I first heard that by the earlier 90's. Except that the timeframe was 10 years, not 5.

Most of the time, people don't want to bother with several ortogonal tag sets. That's because most of the time, just one hierarchical set is enough, and when it's not people simply put lots of data inside a single file, and use application specific tools for dealing with it.

AI will probably change that. But untill then, no, people won't organise their data in an n-dimensional space.