====== Tagsets ======

Many corpora are annotated for word class -- for every word form in the corpus, there is a “pos” tag describing what part of speech it is (see [[cqp:corpus-structure|Corpus Structure]] for more information).

There is no generally agreed-upon set of word classes and no generally agreed-upon way of referring to word classes -- different corpora use different sets of tags. Thus, you always have to check the ''info'' file or the manual of a corpus in order to construct your queries.

Some widely-used tagsets for English are the following:

  * [[corpora:tagset-penn|The Penn tagset]]
  * [[corpora:tagset-penn-historical|The Historical English Penn Treebank tagset]]
  * [[corpora:tagset-treetagger|The Tree Tagger tagset]]
  * [[corpora:tagset-claws5|The CLAWS 5 tagset]], used, for example, for the British National Corpus
  * The [[corpora:tagset-claws7|CLAWS 7 tagset]], used, for example, in the BNC 2014.
  * The [[corpora:tagset-claws7-coxa| CLAWS 7 tagset (COCA/COHA version)]] – a variant of CLAWS 7 used in the Corpus of Contemporary American English and the Corpus of Historical American English

Most German corpora use (some version of) the STTS tagset:

  * [[corpora:tagset-stts-original|The original STTS tagset]]