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Sentiment Analysis and Opinion Mining by Bing Liu

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CHAPTER 5

Aspect-based Sentiment Analysis

Following the natural progression of chapters, this chapter should focus on phrase- and word-level sentiment classification as the last two chapters were about document- and sentence-level classification. However, we leave that topic to the next chapter. In this chapter, we focus on aspect-based sentiment analysis as it is time to deal with the full problem defined in Chapter 2 and many phrase and word sentiments depend on aspect contexts.

As we discussed in the two previous chapters, classifying opinion texts at the document level or the sentence level is often insufficient for applications because they do not identify opinion targets or assign sentiments to such targets. Even if we assume that each ...

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