W poszukiwaniu często wystepujących wzorców międzytransakcyjnych w bazach danych
[Mining frequent inter-transaction patterns from transaction databases]

Thanh-Ngo Nguyen (Katedra Systemów Informatycznych, PWr, Wrocław)


Traditional association analysis is intra-transactional because it focuses on 
association relationships among itemsets within a transaction. For example, an 
intra-transaction association rule might be: "If the stock prices of Microsoft 
and IBM go up, the price of Intel is likely to go up on the same day". However, 
intra-transactional approaches cannot capture a rule like: "If the stock prices 
of Microsoft and IBM go up, the price of Intel is likely to go up two days 
later". To solve this problem, inter-transaction association rule mining extends 
the association rules to describe association relationships among itemsets across 
several transactions.