A semantic wiki is a wiki that has an underlying model of the knowledge described in its pages. Regular, or syntactic, wikis have structured text and untyped hyperlinks. Semantic wikis, on the other hand, provide the ability to capture or identify information about the data within pages, and the relationships between pages, in ways that can be queried or exported like a database[1][2] through semantic queries.
Semantic wikis were first proposed in the early 2000s, and began to be implemented seriously around 2005.[3][4] As of 2021, well-known semantic wiki engines are Semantic MediaWiki and Wikibase.[5]
^A semantic wiki for collaborative knowledge formation, Sebastian Schaffert, Andreas Gruber, and Rupert Westenthaler, Research Report, Knowledge-based Information Systems Group, Salzburg Research, Austria,
November 23, 2005