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Table 1 A sample transaction database

From: GatewayNet: a form of sequential rule mining

ID Time Itemset ID Time Itemset
1 0 {I1,I2} 4 0 {I1}
1 1 {I3} 4 2 {I2,I3}
1 4 {I2,I3} 4 3 {I1,I2}
2 0 {I2} 5 0 {I1}
3 2 {I1} 5 1 {I1,I2}
3 5 {I2} 5 4 {I1,I2,I3}