This is a very basic classifier that gives a polarity (positive, negative, neutral) given a text and a polarity lexicon. It uses Tree-Tagger by Helmut Schmid for Bulgarian language. Please, pay attention to the private license of Tree-Tagger which only allows you to use the system for research purposes.

• Perl interpreter (in Linux)

echo брат ми е много щастлив | ./classif.sh

The system consists of two modules:

• the PoS tagger Tree-Tagger for Bulgarian
• a basic lexicon-based classifier in Perl that just counts positive and negative lemmas by looking up a polarity lexicon

The two modules are connected by means of the following pipeline:

./cmd/tree-tagger-bulgarian |./classif.perl ./resources/dico-bl.csv

The system makes uses of a polarity lexicon, dico-bl.csv, with more than 2,000 lemmas, built by Velyana Patsova.