DonXML writes about Controlled Vocabularies (CVs), Thesauri and tagging blogs, images, etc. here. He and I have talked about this at length. As expected there are a number of naysayers about this concept. We predicted that it would be difficult to convince people that tagging via CV is valuable, practical and possible. Of course it would only benefit those who were willing to do a small amount of extra work. But it really isn't much more than what we do now with categories. On the flip side of this,...