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This page pertains to UD version 2.

UD Latvian LVTB

Language: Latvian (code: lv)
Family: Indo-European, Baltic

This treebank has been part of Universal Dependencies since the UD v1.3 release.

The following people have contributed to making this treebank part of UD: Lauma Pretkalniņa, Laura Rituma, Baiba Saulīte, Gunta Nešpore-Bērzkalne, Normunds Grūzītis.

Repository: UD_Latvian-LVTB
Search this treebank on-line: PML-TQ
Download all treebanks: UD 2.14

License: CC BY-SA 4.0

Genre: news, fiction, legal, spoken, academic

Questions, comments? General annotation questions (either Latvian-specific or cross-linguistic) can be raised in the main UD issue tracker. You can report bugs in this treebank in the treebank-specific issue tracker on Github. If you want to collaborate, please contact [lauma (æt) ailab • lv, normunds (æt) ailab • lv]. Development of the treebank happens outside the UD repository. If there are bugs, either the original data source or the conversion procedure must be fixed. Do not submit pull requests against the UD repository.

Annotation Source
Lemmas annotated manually
UPOS annotated manually in non-UD style, automatically converted to UD
XPOS annotated manually
Features annotated manually in non-UD style, automatically converted to UD
Relations annotated manually in non-UD style, automatically converted to UD


Latvian UD Treebank is based on Latvian Treebank (LVTB), being created at University of Latvia, Institute of Mathematics and Computer Science, Artificial Intelligence Laboratory.

Latvian UD Treebank v2.14 consists of 18’850 sentences (317’369 tokens), and it has been obtained by automatic conversion of both the morphological and the syntactic annotations of the original LVTB treebank. LVTB data contains manually verified syntactic annotation according to a hybrid dependency-constituency schema, as well as manually verified morphological tags and lemmas. LVTB is released in parallel with Latvian UD Treebank since v2.2 and features the same version numbers. The corresponding LVTB versions are listed here. Key LvtbNodeId in Latvian UD Treebank CoNLL-U field MISC provides the mapping from Latvian UD Treebank to LVTB. Each LVTB version is superset of the corresponding Latvian UD Treebank version in terms of included sentences.


This work was supported by European Regional Development Fund under the grant agreement No. (Full Stack of Language Resources for Natural Language Understanding and Generation in Latvian) in synergy with the grant agreement No. The pilot project was supported by State Research Programme “National Identity”. The work was continued within the State Research Programme “Digital Resources for the Humanities” under the grant agreement No. VPP-IZM-DH-2020/1-0001, and now is continued in State Research Programme “Research on Modern Latvian Language and Development of Language Technology” under the grant agreement No. VPP-LETONIKA-2021/1-0006.

Statistics of UD Latvian LVTB

POS Tags






Tokenization and Word Segmentation



Nominal Features

Degree and Polarity

Verbal Features

Pronouns, Determiners, Quantifiers

Other Features


Auxiliary Verbs and Copula

Core Arguments, Oblique Arguments and Adjuncts

Here we consider only relations between verbs (parent) and nouns or pronouns (child).

Verbs with Reflexive Core Objects

Relations Overview