informal_approach


 * Informal approaches** argue that classification can be informal, decentralised, incremental and emergent. Such informal structures, sometimes called folksonomies, are shared vocabularies that emerge in an online environment where users independently assign their own categories; consensus is not required.

Summarise cases of informal approaches

Cases include

Tools include
 * Del.icio.us™ ([|http://del.icio.us])

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