Editing Word-sense disambiguation (section)

==External knowledge sources==
Knowledge is a fundamental component of WSD. Knowledge sources provide data which are essential to associate senses with words. They can vary from corpora of texts, either unlabeled or annotated with word senses, to machine-readable dictionaries, thesauri, glossaries, ontologies, etc. They can be{{sfn|Litkowski|2005|pp=753–761}}{{sfn|Agirre|Stevenson|2007|pp=217–251}} classified as follows:

Structured:

# [[Machine-readable dictionary|Machine-readable dictionaries]] (MRDs)
# [[Ontologies]]
# [[Thesauri]]

Unstructured:

# [[Collocation|Collocation resources]]
# Other resources (such as [[word frequency list]]s, [[stoplist]]s, domain labels,{{sfn|Magnini|Cavaglià|2000|pp=1413–1418}} etc.)
# [[text corpus|Corpora]]: raw corpora and sense-annotated corpora