Shirky begründet, warum es z.B. beim social bookmarking sinnvoll ist, a posteriori einfache Begriffe als Tags zu verwenden - statt zu versuchen, eine übergreifende hierarchische Organisation der links zu schaffen.
"Folksonomy is a neologism for a practice of collaborative categorization using simple tags in a flat namespace. This feature has begun appearing in a variety of social software
EXAMINATION OF THE SYSTEMIC PROPERTIES AND FORMS of interaction that characterize classification and categorization reveals fundamental syntactic differences between the structure of classification systems and the structure of categorization systems.