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Sentiment Analysis and Opinion Mining by Bing Liu

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CHAPTER 3

Document Sentiment Classification

Starting from this chapter, we discuss the current major research directions or topics and their core techniques. Sentiment classification is perhaps the most extensively studied topic (also see the Pang and Lee, 2008). It aims to classify an opinion document as expressing a positive or negative opinion or sentiment. The task is also commonly known as the document-level sentiment classification because it considers the whole document as a basic information unit. A large majority of research papers on this topic classifies online reviews. We thus also define the problem in the review context, but the definition is also applicable to other similar contexts.

 

Problem definition: Given an opinion document ...

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