solid black solid black red rectangle blue diamond green rectangle violet rectangle red rectangle yellow rectangle gray note yellow oval 30 ortho label xlabel End of procedure { [ =< > =" " shape= color= fillcolor= color= fontname=" " fontsize= style=" " fontcolor= tooltip=" " ] } -> [ =" " color= style=" " fontname=" " fontsize= arrowhead=" " tooltip=" " labeltooltip=" " ] digraph " " { graph [splines= label=" " rankdir=" " ] } <B> WARNING </B> <B> CAUTION </B> <B> NOTE </B> none none {rank=same; } Yes No Yes No none {rank=same; } - - - - - - - - - - - <B> </B> * * <I> </I> / / <U> </U> _ _ <O> </O> ` ` <S> </S> - - <SUP> </SUP> ^ <SUB> </SUB> ( ) <FONT FACE="monospace"> </FONT> - . Step Preliminary requirement