Patent Document ID: 7987188
Application ID: 11844222

Base Claim:
1. A method of constructing a domain-specific sentiment classifier for classifying sentiment expressed by documents in a specified domain, comprising: scoring sentiments expressed by a plurality of domain-specific documents responsive to a domain-independent sentiment lexicon; identifying a set of high-sentiment documents responsive to the scoring; creating a domain-specific sentiment lexicon based at least in part on the set of high-sentiment documents; generating the domain-specific sentiment classifier responsive to the domain-specific sentiment lexicon; and storing the domain-specific sentiment classifier.

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Claim 6:
6. The method of claim 1 , wherein creating the domain-specific sentiment lexicon based at least in part on the set of high-sentiment documents comprises: identifying n-grams occurring within the documents in the set of high-sentiment documents; filtering the identified n-grams to remove n-grams unlikely to express sentiment in the specific domain; and storing the filtered n-grams as the domain-specific sentiment lexicon.