Wgraph:Ming01.wgl

 node Apriori {label "Algorithm:=Apriori,Algorithm:=AprioriTid,Algorithm:=AprioriHybrid\nConference:= VLDB Conference"}
 node FP-Tree {}
 node GSP {}
 node FreeSpan {}
 node PrefixSpan {}
 node TPrefixSpan {}
 edge Apriori FP-Tree {label "improve" linestyle dashed color blue thickness 4}
 edge Apriori GSP {label "improve" linestyle dotted 
                   arrowstyle 'half rhomb + filled circle' arrowcolor red
                   backarrowstyle 'filled circle + filled half box + dslash' backarrowsize 14 backarrowcolor magenta}
 edge GSP PrefixSpan {label "improve" kind leftbentnear}
 edge PrefixSpan TPrefixSpan {label "improve" kind rightbentnear}

 nodetype * {width 80 height 60 color yellow}
 yspace 300 splines yes
 orientation = left_to_right