a kind of controlled vocabulary. A thesaurus can form part of an ontology and be represented in the Simple Knowledge Organization System (SKOS). Thesauri are used in natural language processing for word-sense disambiguation and text simplification for machine translation systems. See also Conceptual dictionary Bibliography W.E. Collinson, "Comparative Synonymics: Some Principles and Illustrations", Transactions of the Philological Society 38:1:54–77, November 1939, Gerda Hassler, "Lafaye's Dictionnaire des synonymes in the History of Semantics" in Sheli Embleton, John E. Joseph, Hans-Josef Hiederehe, The Emergence of the Modern Language Sciences, John Benjamins 1999, , p. 1:27–40 Werner Hüllen, "Roget's Thesaurus, deconstructed" in Historical Dictionaries and Historical Dictionary Research, papers from the International Conference on Historical Lexicography and Lexicology, University of Leicester, 2002, Max Niemeyer Verlag 2004, , p. 83–94 Werner Hüllen, A history of Roget's thesaurus : origins, development, and design, Oxford University Press 2004, Werner Hüllen, Networks and Knowledge in Roget's Thesaurus, Oxford, January 2009, , Gertrude E. Noyes, "The Beginnings of the Study of Synonyms in England", Publications of the Modern Language Association of America (PMLA) 66:6:951–970 (December 1951) Eric Stanley, "Polysemy and Synonymy and how these Concepts were Understood from the Eighteenth Century onwards in Treatises, and Applied in Dictionaries of English" in Historical Dictionaries and Historical Dictionary Research, papers from the International Conference on Historical Lexicography and Lexicology, University of Leicester, 2002, Max Niemeyer Verlag 2004, , p. 157–184 References External links OneLook Thesaurus in OneLook online Reference works Dictionaries by type Lexical semantics es:Tesauro#En literatura