Since the earliest days of the "semantic web,", millions of dollars and hours of coding effort have been thrown at the problem of really organizing large corpuses of information, with two approaches emerging: rigid ontologies (like the Dewey Decimal system) that require a system's users to be deeply expert in the structures they're working in; and "folksonomies" (aka hashtags), which allow anyone to tag anything with anything, and leads to fragmentation (like #sign or #signs; or #photos, #pix, and #pictures, etc). Read the rest