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This page pertains to UD version 2.

UD Slovak SNK

Language: Slovak (code: sk)
Family: Indo-European, Slavic

This treebank has been part of Universal Dependencies since the UD v1.4 release.

The following people have contributed to making this treebank part of UD: Katarína Gajdošová, Mária Šimková, Daniel Zeman.

Repository: UD_Slovak-SNK
Search this treebank on-line: PML-TQ
Download all treebanks: UD 2.14

License: CC BY-SA 4.0

Genre: fiction, nonfiction, news

Questions, comments? General annotation questions (either Slovak-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 [zeman (æt) ufal • mff • cuni • cz]. 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 in non-UD style, automatically converted to UD
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


The Slovak UD treebank is based on data originally annotated as part of the Slovak National Corpus, following the annotation style of the Prague Dependency Treebank.

Slovak Dependency Treebank (Slovenský závislostný korpus) was created as part of the Slovak National Corpus at the Ľ. Štúr Institute of the Slovak Academy of Sciences. The original annotation follows the guidelines of the Prague Dependency Treebank (Czech), slightly modified in the spirit of Slovak grammatical tradition. Morphological tags, lemmas and dependency relations have been assigned manually to every word.

The present dataset is a subset of the original treebank. We automatically selected the sentences where the two human annotators 100% agreed on the analysis. This increases the quality and trustworthiness of the data but it also results in selecting short sentences most of the time. An extended version may be published in the future when manually merged and checked annotation is available.

This subset annotated in the original PDT-like style is available separately, see http://hdl.handle.net/11234/1-1822 and cite as

Gajdošová, Katarína; Šimková, Mária et al., 2016, Slovak Dependency Treebank, LINDAT/CLARIN digital library at the Institute of Formal and Applied Linguistics, Charles University in Prague, http://hdl.handle.net/11234/1-1822.

UD_Slovak contains the same data with annotation converted to conform to the Universal Dependencies guidelines. The original treebank was prepared by a team led by Katarína Gajdošová and Mária Šimková. Selection of sentences for this subset and conversion to Universal Dependencies was done by Dan Zeman.



Statistics of UD Slovak SNK

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).

Reflexive Verbs

Reflexive Passive

Verbs with Reflexive Core Objects

Relations Overview