Apriori is an algorithm for frequent item set mining and association rule learning over relational databases. It proceeds by identifying the frequent individual items in the database and extending them to larger and larger item sets as long as those item sets appear sufficiently often in the database.
P. Kalaivani, D. Hanirex, and D. Kaliyamurthie. International Journal on Recent and Innovation Trends in Computing and Communication, 3 (3):
1142--1144(March 2015)