digraph mtz_utils {
        ranksep=".5 equally";
        node [fixedsize,width=2.0,height=1.0,fontname="Helvetica"];
	reflfile [label="Any standard\n(non multi-record)\nformatted\nreflection file",style=filled,fillcolor=lightgrey];
	import [shape=box,label="Convert to MTZ\n& Standardise"];
	mtzout [label="MTZ",fontname="Times-Italic"];
	mtzin [label="MTZ",fontname="Times-Italic"];
	export [shape=box,label="Convert from MTZ"];
	ext_prog [shape=box,label="SHELX,         CNS,\nTNT,        XtalView",style=filled,fillcolor=lightgrey];
//
	reflfile -> import -> mtzout;
	mtzin -> export -> ext_prog;
}