Ahti Lohk


2020

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Some Issues with Building a Multilingual Wordnet
Francis Bond | Luis Morgado da Costa | Michael Wayne Goodman | John Philip McCrae | Ahti Lohk
Proceedings of the 12th Language Resources and Evaluation Conference

In this paper we discuss the experience of bringing together over 40 different wordnets. We introduce some extensions to the GWA wordnet LMF format proposed in Vossen et al. (2016) and look at how this new information can be displayed. Notable extensions include: confidence, corpus frequency, orthographic variants, lexicalized and non-lexicalized synsets and lemmas, new parts of speech, and more. Many of these extensions already exist in multiple wordnets – the challenge was to find a compatible representation. To this end, we introduce a new version of the Open Multilingual Wordnet (Bond and Foster, 2013), that integrates a new set of tools that tests the extensions introduced by this new format, while also ensuring the integrity of the Collaborative Interlingual Index (CILI: Bond et al., 2016), avoiding the same new concept to be introduced through multiple projects.

2014

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Some structural tests for WordNet with results
Ahti Lohk | Heili Orav | Leo Võhandu
Proceedings of the Seventh Global Wordnet Conference

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Dense Components in the Structure of WordNet
Ahti Lohk | Kaarel Allik | Heili Orav | Leo Võhandu
Proceedings of the Ninth International Conference on Language Resources and Evaluation (LREC'14)

This paper introduces a test-pattern named a dense component for checking inconsistencies in the hierarchical structure of a wordnet. Dense component (viewed as substructure) points out the cases of regular polysemy in the context of multiple inheritance. Definition of the regular polysemy is redefined ― instead of lexical units there are used lexical concepts (synsets). All dense components are evaluated by expert lexicographer. Based on this experiment we give an overview of the inconsistencies which the test-pattern helps to detect. Special attention is turned to all different kind of corrections made by lexicographer. Authors of this paper find that the greatest benefit of the use of dense components is helping to detect if the regular polysemy is justified or not. In-depth analysis has been performed for Estonian Wordnet Version 66. Some comparative figures are also given for the Estonian Wordnet (EstWN) Version 67 and Princeton WordNet (PrWN) Version 3.1. Analysing hierarchies only hypernym-relations are used.

2012

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First steps in checking and comparing Princeton WordNet and Estonian Wordnet
Ahti Lohk | Kadri Vare | Leo Võhandu
Proceedings of the EACL 2012 Joint Workshop of LINGVIS & UNCLH