*Sequential pattern mining* [2, 25, 56] is an important topic in data mining and is often applied to basket data analysis and Web usage analysis. There are some interesting applications of sequential data mining to moving object databases. First, we briefly explain the notion of sequential pattern mining.

Suppose that there are four moving objects and their movement histories are given as , , , and , where A to E are location symbols and represents a sequence. For example, means the moving object visits locations A, B, and C in this order. An example of a *sequential pattern* is meaning C is visited after A. Note that other places between A and C can be visited. For the above examples, this pattern matches *h*_{1}, *h*_{3}, and *h*_{4}. Since there are two matches ...

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