Categories and Tags

Main problems of folksonomy tagging
Four main problems of folksonomy tagging are plurals, polysemy, synonymy, and depth (specificity) of tagging. Folksonomy-based systems can employ optional authority control of subject keywords, place, personal, or corporate names and resource titles, by connecting the system to established authority control files or controlled vocabularies using new techniques. A folksonomy-based system needs a controlled vocabulary and a suggestion-based system. (Wikipedia, 2008)