diff --git a/arekit/common/data/const.py b/arekit/common/data/const.py
index 5f352288..98024c85 100644
--- a/arekit/common/data/const.py
+++ b/arekit/common/data/const.py
@@ -8,10 +8,6 @@
 OPINION_ID = "opinion_id"
 OPINION_LINKAGE_ID = "linkage_id"
 
-# Corresponds to fields with attitude ends. (values, STRING)
-SOURCE = 'source'
-TARGET = 'target'
-
 # Corresponds to fields with attitude ends. (indices, INT)
 S_IND = 's_ind'
 T_IND = 't_ind'