Discovering Significant Sequential Patterns in Data Stream by an Efficient Two-Phase Procedure

Figure 2

A case of creating a tree and a header table. (a) The header table, (b) the tree after adding T₁, (c) the tree after adding T₂, (d) the tree after adding T₃, and (e) the tree after adding all transactions (pointer hidden).

(a)

(b)

(c)

(d)

(e)