License: Creative Commons Attribution 3.0 Unported license (CC BY 3.0)
When quoting this document, please refer to the following
DOI: 10.4230/OASIcs.SLATE.2014.169
URN: urn:nbn:de:0030-drops-45689
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Gonçalo Oliveira, Hugo ; Santos, António Paulo ; Gomes, Paulo

Assigning Polarity Automatically to the Synsets of a Wordnet-like Resource

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This article describes work towards the automatic creation of a conceptual polarity lexicon for Portuguese. For this purpose, we take advantage of a polarity lexicon based on single lemmas to assign polarities to the synsets of a wordnet-like resource. We assume that each synset has the polarity of the majority of its lemmas, given by the initial lexicon. After that, polarity is propagated to other synsets, through different types of semantic relations. The relation types used were selected after manual evaluation. The main result of this work is a lexicon with more than 10,000 synsets with an assigned polarity, with accuracy of 70% or 79%, depending on the human evaluator. For Portuguese, this is the first synset-based polarity lexicon we are aware of. In addition to this contribution, the presented approach can be applied to create similar resources for other languages.

BibTeX - Entry

  author =	{Hugo Gon{\c{c}}alo Oliveira and Ant{\'o}nio Paulo Santos and Paulo Gomes},
  title =	{{Assigning Polarity Automatically to the Synsets of a Wordnet-like Resource}},
  booktitle =	{3rd Symposium on Languages, Applications and Technologies},
  pages =	{169--184},
  series =	{OpenAccess Series in Informatics (OASIcs)},
  ISBN =	{978-3-939897-68-2},
  ISSN =	{2190-6807},
  year =	{2014},
  volume =	{38},
  editor =	{Maria Jo{\~a}o Varanda Pereira and Jos{\'e} Paulo Leal and Alberto Sim{\~o}es},
  publisher =	{Schloss Dagstuhl--Leibniz-Zentrum fuer Informatik},
  address =	{Dagstuhl, Germany},
  URL =		{},
  URN =		{urn:nbn:de:0030-drops-45689},
  doi =		{10.4230/OASIcs.SLATE.2014.169},
  annote =	{Keywords: sentiment analysis, polarity, lexicon, wordnet, Portuguese}

Keywords: sentiment analysis, polarity, lexicon, wordnet, Portuguese
Collection: 3rd Symposium on Languages, Applications and Technologies
Issue Date: 2014
Date of publication: 18.06.2014

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