# Constituency Structure over Eojeol in Korean Treebanks

arXiv: https://arxiv.org/abs/2512.22487 · HTML: https://mlsanity.com/paper/2512.22487/

## Key facts

- Cited by 1 papers in the map (data through 14 Oct 2026).
- Builds on 4 of its 31 references that are in the map.
- First posted on arXiv 27 Dec 2025.

## Builds on (most cited first, 4 of 4)

- [Yet Another Format of Universal Dependencies for Korean](https://mlsanity.com/paper/2209.09742/) (2022)
- [K-UD: Revising Korean Universal Dependencies Guidelines](https://mlsanity.com/paper/2412.00856/) (2024)
- [Korean Named Entity Recognition Based on Language-Specific Features](https://mlsanity.com/paper/2305.06330/) (2023)
- [Word segmentation granularity in Korean](https://mlsanity.com/paper/2309.03713/) (2023)

## Built on by (most cited first, 1 of 1)

- [Representing and Parsing Korean Constituency Structure at Different Levels of Granularity](https://mlsanity.com/paper/2608.27035/) (2026)

## Abstract (arXiv)

The design of Korean constituency treebanks raises a central representational question concerning the choice of terminal units. Although Korean words are morphologically complex, treating morphemes as constituency terminals can obscure the distinction between word-internal morphology and phrase-level syntactic structure, and can create mismatches with eojeol-based dependency resources. This paper argues for an eojeol-based constituency representation, with morphological segmentation and fine-grained POS information encoded in a separate, non-constituent layer. A comparative analysis shows that, under explicit normalization assumptions, the Sejong, Penn Korean, and KAIST treebanks can be compared over a shared eojeol-based constituency backbone. Building on this result, we outline an eojeol-based annotation scheme that preserves interpretable constituency, supports cross-treebank comparison and constituency-dependency alignment, and provides a surface-form terminal layer for future end-to-end Korean constituency parsing.