The files in this repository contain mappings from treebank specific tagsets to a set of 12 universal part-of-speech tags. The 12 universal tags are: VERB - verbs (all tenses and modes) NOUN - nouns (common and proper) PRON - pronouns ADJ - adjectives ADV - adverbs ADP - adpositions (prepositions and postpositions) CONJ - conjunctions DET - determiners NUM - cardinal numbers PRT - particles or other function words X - other: foreign words, typos, abbreviations . - punctuation See "A Universal Part-of-Speech Tagset" by Slav Petrov, Dipanjan Das and Ryan McDonald for more details: http://arxiv.org/abs/1104.2086