digraph hexBinary { 

// pattern [label=""];
n0[label="grammars: W2 D8 2E PER 1E"];
n1[ label="seq"];
n0 -> n1;
n2[ label="0-*"];
n1 -> n2;
n3[ label="re"];
n2 -> n3;
n4[ label="seq"];
n3 -> n4;
n5[ label="2-2"];
n4 -> n5;
n6[ label="charClass"];
n5 -> n6;
n7[ label="any_of"];
n6 -> n7;
n8[ label="'0' - '9'"];
n7 -> n8;
n9[ label="'a' - 'f'"];
n7 -> n9;
n10[ label="'A' - 'F'"];
n7 -> n10;
 }