The AFINN lexicon is a list of English terms manually rated for valence with an integer between -5 (negative) and +5 (positive) by Finn Årup Nielsen between 2009 and 2011.
The original lexicon contains some multi-word phrases, but they are excluded here.
The original lexicon is distributed under the Open Database License (ODbL) v1.0. You are free to share, create works from, and adapt the lexicon, as long as you attribute the original lexicon in your work. If you adapt the lexicon, you must keep the adapted lexicon open and apply a similar license.
sentiment_afinn
A data frame with one row for each term
http://www2.imm.dtu.dk/pubdb/views/publication_details.php?id=6010
Finn Årup Nielsen A new ANEW: Evaluation of a word list for sentiment analysis in microblogs. Proceedings of the ESWC2011 Workshop on 'Making Sense of Microposts': Big things come in small packages 718 in CEUR Workshop Proceedings 93-98. 2011 May. http://arxiv.org/abs/1103.2903.