This paper presents a novel approach based on the Appraisal Theory to analyze user-generated, open-ended online restaurant reviews. We selected reviews (N=1100) from restaurants of two Portuguese touristic regions and focus, through content analysis, on the recognition of the main aspects, sentiments and types of attitude mentioned in such reviews. We also measure the interrater agreement on the recognition of ...
Tese de doutoramento, Informática (Engenharia Informática), 2009, Universidade de Lisboa, Faculdade de Ciências ; Existing textual information is knowledge-rich and grows exponentially in time. To be useful to systems performing some type of intelligent processing, this knowledge needs to be automatically handled. Ontologies have emerged as the preferred unifying semantic representation of knowledge in texts a...
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