LX-UDParser is a UD parser for Portuguese, which adopts the Universal Dependency framework, with an initial performance of 90.87 for UAS and 88.01 for LAS under a ten-fold cross validation scheme.

It is described in this article:

António Branco, João Ricardo Silva, Luís Gomes and João Rodrigues, 2022, "Universal Grammatical Dependencies for Portuguese with CINTIL Data, LX Processing and CLARIN support", In Proceedings, 13th Conference on Language Resources and Evaluation (LREC2022).

which should be used as its canonical citation, and to which interested users are referred for detailed information.

This parser is trained with its companion CINTIL-UDep treebank, containing close to 38 K annotated sentences with over 470K tokens, which can be obtained here: https://hdl.handle.net/21.11129/0000-000E-8B2E-3.

You may also be interested in the following related resources that can also be found in this repository:

LX-USuite (https://hdl.handle.net/21.11129/0000-000F-327C-E),
LX-UTagger (https://hdl.handle.net/21.11129/0000-000E-8B2F-2),
LX-DepParser (https://hdl.handle.net/21.11129/0000-000E-598D-0),
LX-Parser (https://hdl.handle.net/21.11129/0000-000E-5999-2),
LX-Suite (https://hdl.handle.net/21.11129/0000-000E-5991-A),
LX-Tagger (https://hdl.handle.net/21.11129/0000-000B-D325-D).