"Louise F. Spiteri writes: "Folksonomies have the potential to add much value to public library catalogs by enabling clients to store, maintain, and organize items of interest in the catalog using their own tags. Tags were acquired over a 30-day period from the daily tag logs of three folksonomy sites, Del.icio.us, Furl, and Technorati. The tags were evaluated against section 6 (choice and form of terms) of the National Information Standards Organization guidelines for the construction of controlled vocabularies."...

"Philosophical relativism appears to be the underlying philosophy behind folksonomies. Because of those underpinnings, it is possible to jettison the limitations of a traditional classification statement such as "A is not B". In a folksonomy system, "A is relative to B", because each item's index terms will depend on the individual user and the tags he or she decides to use. A philosophy of relativism allows folksonomy to draw on many users with various perceptions to classify a document instead of relying on one individual cataloger to set the index terms for that item. Thus, classification terms become relative to each user."