I'm trying to implement Sentiments Analysis functionality and looking for useful features which can be extracted from tweet messages.The features which I have in my mind for now are:
- Sentiment words
- Emotion icons
- Exclamation marks
- Negation words
- Intensity words(very,really etc)
Is there any other useful features for this task? My goal is not only detect that tweet is positive or negative but also I need to detect level of positivity or negativity(let say in a scale from 0 to 100). Any inputs or references to printed papers are very welcome.
Thanks.