- AKA: Collaborative Tagging, Social Classification, Social Indexing, Social Tagging.
- See: Portmanteau.
- A folksonomy is a system of classification derived from the practice and method of collaboratively creating and managing tags to annotate and categorize content; this practice is also known as collaborative tagging, social classification, social indexing, and social tagging. 
- The word folksonomy is a portmanteau of folk and taxonomy.
- (Dextre Clarke et al., 2008) ⇒ Stella Dextre Clarke, Alan Gilchrist, Ron Davies and Leonard Will. (2008). “Glossary of Terms Relating to Thesauri and Other Forms of Structured Vocabulary for Information Retrieval." Willpower Information
- a collection of terms allocated to resources by users in order to categorise or index them in a way that the users consider useful
- Terms in folksonomies, often called tags, are typically added in an uncontrolled manner, without any underlying structure or principles. They may be idiosyncratic, but may also use current terminology more quickly than it can be incorporated into a controlled and structured scheme.----
- (Golder & Huberman, 2006) ⇒ Scott A. Golder, and Bernardo A. Huberman. (2006). “Usage Patterns of Collaborative Tagging Systems.” In: Journal of Information Science, 32(2). doi:10.1177/0165551506062337