I also liked the conclusion that 2 tag sets may be required. I tag generously, with one eye on Technorati & the hope that readers will come here from tag search. This is less useful for my internal del.icio.us "tags as categories" system, where 10 broad & recurrent tags would help the reader navigate my site more efficiently. Maybe tags can't really be categories after all?
Tagging is described as a 1 stage process, where you think of many concepts and tag them, seems natural, intuitive, easy, and fun (well fun for librarians!)
Seems like an easy process; although when considering later retrieval you have to think carefully about the tag names for future findability…but I guess the first concepts that come to mind are probably going to work best
Categorising is described as a 2 step process, where you think of many concepts but you only choose one concept for the item.
Filed In: folksonomy, tags, categories