Definition of a Linguistic Resource for Opinion Mining

Many approaches to Opinion Mining are based on linguistic resources, lexicons or lists of words. The lack of suitable and/or available resources is one of the main problems in the process of opinion extraction and in general in the analysis of textual resources based on a linguistic approach. In this paper we describe FreeWordNet, a linguistic resource based on WordNet and useful in the automatic method we propose for the extraction of features in a general domain. In FreeWordNet each synset is enriched with a set of properties related to adjectives and adverbs and has a positive, negative or objective value associated. The properties associated to each synset support a better identification of the sentiment expressed in relation to the domain and give more details about the relevant terms or the expressions having an opinion associated.