Mac-Morpho (corpus of Brazilian Portuguese texts annotated with part-of-speech tags)

[fititnt]

• http://nilc.icmc.usp.br/macmorpho/
• Download: http://nilc.icmc.usp.br/macmorpho/macmorpho-v3.tgz
• Manual: http://nilc.icmc.usp.br/macmorpho/macmorpho-manual.pdf
• Disponível também via NLTK data http://www.nltk.org/nltk_data/

Mac-Morpho is a corpus of Brazilian Portuguese texts annotated with part-of-speech tags. Its first version was released in 2003 [1], and since then, two revisions have been made in order to improve the quality of the resource [2, 3].

The corpus is available for download split into train, development and test sections. These are 76%, 4% and 20% of the corpus total, respectively (the reason for the unusual numbers is that the corpus was first split into 80%/20% train/test, and then 5% of the train section was set aside for development). This split was used in [3], and new POS tagging research with Mac-Morpho is encouraged to follow it in order to make consistent comparisons possible.

• Download Mac-Morpho
• Download annotation manual (in Portuguese)
  NOTE: the manual was written for its original annotation, i.e., before the changes in the tagset were
  introduced. Therefore, it does not reflect the current state of the corpus.

Disclaimer: Mac-Morpho versions 1, 2 and 3 are licensed under a Creative Commons Attribution 4.0 International License. This means you can distribute, remix, tweak, and build upon Mac-Morpho versions, even commercially, as long as you give us the credit for the original creation. Mac-Morpho License.