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Croatian Dependency Treebank 2.0: New Annotation Guidelines for Improved Parsing / Agić, Željko ; Berović, Daša ; Merkler, Danijela ; Tadić, Marko.

By: Agić, Željko.
Contributor(s): Berović, Daša [aut] | Merkler, Danijela [aut] | Tadić, Marko [aut].
Material type: materialTypeLabelArticleDescription: 2313-2319.Other title: Croatian Dependency Treebank 2.0: New Annotation Guidelines for Improved Parsing [Naslov na engleskom:].Subject(s): 6.03 | 5.04 | dependency treebank, dependency parsing, Croatian language hrv | dependency treebank, dependency parsing, Croatian language engOnline resources: Click here to access online | Click here to access online In: Ninth International Conference on Language Resources and Evaluation (LREC 2014) (26-31.05.2014. ; Reykjavik, Island) Proceedings of the Ninth International Conference on Language Resources and Evaluation (LREC 2014) str. 2313-2319Calzolari, Nicoletta ; Choukri, Khalid ; Declerck, Thierry ; Loftsson, Hrafn ; Maegaard, Bente ; Mariani, Joseph ; Moreno, Asuncion ; Odijk, Jan ; Piperidis, SteliosSummary: We present a new version of the Croatian Dependency Treebank. It constitutes a slight departure from the previously closely observed Prague Dependency Treebank syntactic layer annotation guidelines as we introduce a new subset of syntactic tags on top of the existing tagset. These new tags are used in explicit annotation of subordinate clauses via subordinate conjunctions. Introducing the new annotation to Croatian Dependency Treebank, we also modify head attachment rules addressing subordinate conjunctions and subordinate clause predicates. In an experiment with data-driven dependency parsing, we show that implementing these new annotation guidelines leeds to a statistically significant improvement in parsing accuracy. We also observe a substantial improvement in inter-annotator agreement, facilitating more consistent annotation in further treebank development.
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We present a new version of the Croatian Dependency Treebank. It constitutes a slight departure from the previously closely observed Prague Dependency Treebank syntactic layer annotation guidelines as we introduce a new subset of syntactic tags on top of the existing tagset. These new tags are used in explicit annotation of subordinate clauses via subordinate conjunctions. Introducing the new annotation to Croatian Dependency Treebank, we also modify head attachment rules addressing subordinate conjunctions and subordinate clause predicates. In an experiment with data-driven dependency parsing, we show that implementing these new annotation guidelines leeds to a statistically significant improvement in parsing accuracy. We also observe a substantial improvement in inter-annotator agreement, facilitating more consistent annotation in further treebank development.

Projekt MZOS 130-1300646-0645

Projekt MZOS 130-1300646-1776

ENG

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