Sentiment analysis is the procedure by which
information is extracted from the opinions, appraisals and
emotions of people in regards to entities, events and their
attributes. In decision making,the opinions of others have a
significant effect on customers ease in making choices regards to
online shopping, choosing events, products, entities. In this paper,
the rule based domain independent sentiment analysis method is
proposed. The proposed method classifies subjective and
objective sentences from reviews and blog comments. The
semantic score of subjective sentences is extracted from
SentiWordNet to calculate their polarity as positive, negative or
neutral based on the contextual sentence structure. The results
show the effectiveness of the proposed method and it outperforms
the machine learning methods. The proposed method achieves an
accuracy of 87% at the feedback level and 83% at the sentence
level.