hscale=auto;
{
    compress=yes;
    defstyle arrow [arrow.color=purple];
    a->b [arrow.gvtype=vee]: normal;
    b->c [arrow.gvtype=inv]: inv;
    a->b [arrow.gvtype=sharp]: sharp;
    b->c [arrow.gvtype=vee]: vee;
    a->b [arrow.gvtype=crow]: crow;
    b->c [arrow.gvtype=tee]: tee;
    a->b [arrow.gvtype=curve]: curve;
    b->c [arrow.gvtype=icurve]: icurve;
    a->b [arrow.gvtype=box]: box;
    b->c [arrow.gvtype=sbox]: sbox;
    a->b [arrow.gvtype=diamond]: diamond;
    b->c [arrow.gvtype=sdiamond]: sdiamond;
    a->b [arrow.gvtype=dot]: dot;
    b->c [arrow.gvtype=sdot]: sdot;
    nudge;
    block a->b [arrow.gvtype=vee]: vee;
    block b->c [arrow.gvtype=tee]: tee;
    block a->b [arrow.gvtype=inv]: inv;
    block b->c [arrow.gvtype=sbox]: sbox;
    block a->b [arrow.gvtype=diamond]: 
         gv: diamond;
    block b->c [arrow.gvtype="xmul=0.5|odot"]:  
         gv: odot, xmul=0.5;
};


---;


defcolor brown=139,69,19;
a<->b-c [arrow.gvtype=tinyreddotsizenormalbluenormal];
a<->b-c [arrow.gvtype="smallredlwidth=0.5|osdot|lwidth=1|sizenormalbluenormal"];
a<-b-c [arrow.gvtype=smallnormalbigredicurveredicurve,
        arrow.gvstarttype=graytee];
a<->b [arrow.gvendtype="tiny|color=0,192,0|linesizenormalbrownnormal"];
join b->c [arrow.size=normal, arrow.gvstarttype="xmul=0.5|tee"]; 
a->b-c [arrow.size=normal, arrow.gvtype=onormaltee];
a<->b-c [arrow.gvtype=bluetinynormalgreensmallteeredsizenormaltee];
a->b-c [arrow.gvendtype=llinegrayllinelgraylline,
        arrow.gvmidtype="lwidth=3|llinelline",
        arrow.size=normal];
a<->b-c [arrow.size=normal, arrow.gvendtype=orsharp];
