digraph validation {
        ranksep=".5 equally";
        node [fixedsize,width=2.0,height=1.0,fontname="Helvetica"];
	sfdata_in [label="experimental\ndata and phases"];
	cdata_in [label="model\ncoordinates"];
	sfdep [shape=box,label="Structure Factors\nfor Deposition"];
	sfcheck [shape=box,label="Run SFCHECK\n& PROCHECK"];
	whatcheck [shape=box,label="Run WHATCHECK"];
	rotamer [shape=box,label="Run Rotamer"];
	sfdepdata_out [label="structure factors\nin mmCIF format"];
	sfcheckdata_out [label="analyses of\ngeometry and\nfit with data"];
	whatcheckdata_out [label="structure\nverification"];
	rotamerdata_out [label="rotamer\nanalysis"];
	ref_dep [shape=box,label="more refinement or\ndeposition at PDB"];
//
	sfdata_in -> sfdep [weight=8];
	sfdep -> sfdepdata_out [weight=8];
	sfdepdata_out -> ref_dep;
	sfdata_in -> sfcheck;
	sfcheck ->sfcheckdata_out [weight=8];
	sfcheckdata_out -> ref_dep;
	cdata_in -> sfcheck;
	cdata_in -> whatcheck;
	whatcheck -> whatcheckdata_out [weight=8];
	whatcheckdata_out -> ref_dep;
	cdata_in -> rotamer;
	rotamer -> rotamerdata_out [weight=8];
	rotamerdata_out -> ref_dep;
}