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- [papers.md](https://md.mova.elamur.ai/free/en/docs/treebanks/lv/lvtb/papers/) — Papers: UD_Latvian-LVTB

# UD_Latvian-LVTB

Treebank card from UD release 2.18: metadata and texts come from `UD_Latvian-LVTB/README.md`; size is counted by streaming the `.conllu` files and checked against the release `stats.xml`. Generated by `tools/treebanks build`; do not edit by hand. Papers: [Papers: UD_Latvian-LVTB](https://md.mova.elamur.ai/free/en/docs/treebanks/lv/lvtb/papers/); seeds: `seeds/`; converter: `convert.md`.

| Field | Value |
| --- | --- |
| UD name | UD_Latvian-LVTB |
| Language | Latvian (`lv`) |
| Family | IE |
| Treebank code | `lv_lvtb` |
| UD page | [universaldependencies.org/treebanks/lv lvtb/index.html](https://universaldependencies.org/treebanks/lv_lvtb/index.html) |
| License | CC BY-SA 4.0 |
| Genres | news, fiction, legal, spoken, academic |
| Text in data | yes |
| Parallel | no |
| In UD since | UD v1.3 |
| Authors | Lauma Pretkalniņa; Laura Rituma; Gunta Nešpore-Bērzkalne; Baiba Saulīte; Artūrs Znotiņš; Normunds Grūzītis |
| Contact | [lauma@ailab.lv](mailto:lauma@ailab.lv), [normunds@ailab.lv](mailto:normunds@ailab.lv) |
| Development | outside the UD repo (elsewhere): fixes go to the source or the converter |

## Annotation layers

| Layer | Origin |
| --- | --- |
| Lemmas | manual native |
| UPOS | converted from manual |
| XPOS | manual native |
| Features | converted from manual |
| Relations | converted from manual |

UD scale: *manual native* — annotated by hand directly in UD; *converted from manual* — converted from manual annotation in another scheme; *converted with corrections* — converted and partly corrected by hand; *automatic with corrections* — automatic, with partial manual corrections; *automatic* — automatic; *not available* — the layer is absent.

## Size

| Split | Sentences | Tokens | Words | Multiword tokens | Empty nodes |
| --- | --- | --- | --- | --- | --- |
| train | 15 059 | 258 266 | 258 266 | 0 | 585 |
| dev | 2 109 | 34 729 | 34 729 | 0 | 116 |
| test | 2 412 | 37 323 | 37 323 | 0 | 175 |
| **total** | 19 580 | 330 318 | 330 318 | 0 | 876 |

Tokens are surface tokens (Spanish `vámonos` is one), words are syntactic words (`vamos` + `nos`); multiword tokens are those split into several words; empty nodes are the `N.M` nodes of the enhanced graph.

## Summary

> Latvian UD Treebank is based on Latvian Treebank ([LVTB](http://sintakse.korpuss.lv)), being created at University of Latvia, Institute of Mathematics and Computer Science, [Artificial Intelligence Laboratory](http://ailab.lv).

## Introduction

> Latvian UD Treebank v2.18 consists of 19'580 sentences (330'318 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](http://sintakse.korpuss.lv/versions.html). 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.

- [← previous UD_Latvian-Cairo](https://md.mova.elamur.ai/free/en/docs/treebanks/lv/cairo/)
- [↑ back to Latvian (lv) — UD 2.18 treebanks](https://md.mova.elamur.ai/free/en/docs/treebanks/lv/)