Wgraph:Ming01.wgl

 node Apriori {label "Apriori\nAprioriTid\nAprioriHybrid"}
 node FP-Tree {}
 node GSP {}
 node FreeSpan {}
 node PrefixSpan {}
 node TPrefixSpan {}
 edge Apriori FP-Tree {label "improve" kind rightbentnear}
 edge Apriori GSP {label "improve" kind rightbentnear}
 edge GSP PrefixSpan {label "improve"}
 edge GSP FreeSpan {label "improve"}
 edge FreeSpan PrefixSpan {label "improve"}
 edge PrefixSpan TPrefixSpan {label "improve"}

 nodetype * {width 100 height 80 color lightgrey}
 orientation = left_to_right