Wgraph:Ming01.wgl

 node Apriori {label "Apriori\nAprioriTid\nAprioriHybrid\n1994"}
 node FP-Tree {label "FP-Tree\n2000"}
 node GSP {label "GSP\n1996"}
 node FreeSpan {label "FreeSpan\n2000"}
 node PrefixSpan {label "PrefixSpan\n2004"}
 node TPrefixSpan {label "TPrefixSpan\n2007"}
 node FUFP {label "FUFP\n2007"}
 node Pre-FUFP {label "Pre-FUFP\n2008"}

 edge Apriori FP-Tree {label "improve" kind rightbentnear}
 edge FP-Tree FUFP{label "improve" kind rightbentnear}
 edge FUFP Pre-FUFP{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 120 height 80 color LIGHTYELLOW}
 orientation = left_to_right