/* */ // " " = -> , ; ] [ digraph node edge subgraph size page ratio margin nodesep ranksep ordering rankdir pagedir rank rotate center nslimit mclimit layers color bgcolor URL height width fixedsize shape label shape fontsize fontname fillcolor fontcolor style layer regular peripheries sides orientation distortion skew minlen weight dir tailclip headclip arrowhead arrowtail arrowsize headlabel taillabel labelfontcolor labelfontname labelfontsize labeldistance labelangle samehead sametail constraint fill compress auto same min max record polygon epsf plaintext ellipse circle egg triangle box diamond trapezium parallelogram house hexagon octagon. filled solid dashed dotted bold invis forward back both none none normal inv dot odot invdot invodot true false LR TB