Meet UD_Czech-PDTC: A Large and Genre-Rich Treebank in Universal Dependencies

arXiv cs.CL Papers
czech treebank universal-dependencies dataset nlp computational-linguistics genre-rich

Summary

This paper introduces UD_Czech-PDTC, a large and genre-diverse treebank for Czech in the Universal Dependencies framework, derived from the Prague Dependency Treebank-Consolidated. It describes the conversion process and differences between annotation schemes.

arXiv:2606.24337v1 Announce Type: new Abstract: Czech has been part of Universal Dependencies since its first release in 2015. It has also been one of the best represented languages, with the Prague Dependency Treebank being order of magnitude larger than most other UD treebanks. More recently, three other datasets from the Prague family were added and the annotations thoroughly revisited, forming the "Prague Dependency Treebank-Consolidated" (PDT-C). In comparison to the original PDT, PDT-C is more than twice as large, but it is also much more diverse in terms of genres and domains. In this paper, we describe the conversion of the new resource to Universal Dependencies. While the two annotation schemes are relatively similar at the first sight, there are numerous small differences in topology of the dependency structures and in granularity of the POS and relation type inventories. We demonstrate a selection of such differences on examples, discuss the diverging motivations, as well as ways to overcome the differences during conversion. We argue that while PDT is less "universal" and more tightly bound to one language, its multi-layer annotation is rich and provides all information needed for basic UD trees, and much more.
Original Article
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# Meet UD_Czech-PDTC: A Large and Genre-Rich Treebank in Universal Dependencies
Source: [https://arxiv.org/abs/2606.24337](https://arxiv.org/abs/2606.24337)
[View PDF](https://arxiv.org/pdf/2606.24337)

> Abstract:Czech has been part of Universal Dependencies since its first release in 2015\. It has also been one of the best represented languages, with the Prague Dependency Treebank being order of magnitude larger than most other UD treebanks\. More recently, three other datasets from the Prague family were added and the annotations thoroughly revisited, forming the "Prague Dependency Treebank\-Consolidated" \(PDT\-C\)\. In comparison to the original PDT, PDT\-C is more than twice as large, but it is also much more diverse in terms of genres and domains\. In this paper, we describe the conversion of the new resource to Universal Dependencies\. While the two annotation schemes are relatively similar at the first sight, there are numerous small differences in topology of the dependency structures and in granularity of the POS and relation type inventories\. We demonstrate a selection of such differences on examples, discuss the diverging motivations, as well as ways to overcome the differences during conversion\. We argue that while PDT is less "universal" and more tightly bound to one language, its multi\-layer annotation is rich and provides all information needed for basic UD trees, and much more\.

## Submission history

From: Milan Straka \[[view email](https://arxiv.org/show-email/897090c7/2606.24337)\] **\[v1\]**Tue, 23 Jun 2026 09:22:42 UTC \(988 KB\)

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