An FUSP-Tree Maintenance Algorithm for Record Modification

There are several algorithms proposed for maintaining the sequential patterns as records are inserted. In addition to record insertion, the pattern maintenance for record modification is also very important in the real-applications. In the past, we have proposed the fast updated sequential pattern tree (called FUSP tree) structure for handling record insertion. In this paper, we attempt to handle the maintenance of sequential patterns for record modification. We do the task by maintaining the FUSP tree and then generate the patterns whenever necessary. An FUSP-tree maintenance algorithm for record modification is thus proposed for reducing the execution time in reconstructing the tree. The proposed approach is expected to achieve a good trade-off between execution time and tree complexity.