history.dot

/*	$Id$ */
digraph manpages {
	rankdir=LR;
	ranksep=0.15;
	nodesep=0.15;

	node [shape=ellipse,fontname="Helvetica",colorscheme=dark24,style=filled];
	edge [arrowhead=normal,arrowsize=0.5];

	subgraph { 
		node [color=1];
		runoff1 [label="RUNOFF" URL="#x1964_RUNOFF"];
		runoff4 [label="RUNOFF" URL="#x1966_RUNOFF"];
		runoff2 [label="roff" URL="#x1967_roff"];
		script [label="SCRIPT" URL="#x1967_SCRIPT"];
		runoff3 [label="runoff" URL="#x1969"]; 
		compose [label="compose" URL="#x1974_compose"]; 
	}

	subgraph {
		node [color=2];
		rf [label="rf" URL="#x1970_rf"];
		roff1 [label="roff(1)" URL="#x1971"];
		roff2 [label="roff" URL="#x1969_roff"];
		nroff [label="nroff(1)" URL="#x1972"];
		troff [label="troff(1)" URL="#x1973"];
		ditroff [label="ditroff(1)" URL="#x1979"];
		ptroff [label="troff(1)" URL="#x1992"];
		htroff [label="troff(1)" URL="#x2005_troff"];
	}

	subgraph {
		node [color=3];
		groff [label="groff(1)" URL="#x1989_groff"];
		awf [label="awf(1)" URL="#x1991_awf"];
		cawf [label="cawf(1)" URL="#x1991_cawf"];
		mandoc [label="mandoc(1)" URL="#x2008_mandoc"];
	}

	runoff1 -> { runoff4 runoff2 runoff3 script };
	runoff3 -> { roff1 compose rf roff2 };
	roff1 -> nroff;
	nroff -> troff;
	troff -> ditroff;
	ditroff -> { groff htroff ptroff awf };
	groff -> mandoc;
	awf -> cawf;


	subgraph {
		node[colorscheme=x11,color=white];
		1964 -> 1966 -> 1967 -> 1969 -> 1970 -> 1971 -> 1972 -> 
		1973 -> 1974 -> 1979 -> 1989 -> 1991 -> 1992 -> 2005 -> 2008;
	}

	{ rank = same; 1964 runoff1 };
	{ rank = same; 1967 script runoff2 };
	{ rank = same; 1969 runoff3 roff2 };
	{ rank = same; 1970 rf };
	{ rank = same; 1971 roff1 };
	{ rank = same; 1972 nroff };
	{ rank = same; 1973 troff };
	{ rank = same; 1974 compose };
	{ rank = same; 1979 ditroff };
	{ rank = same; 1989 groff };
	{ rank = same; 1991 awf cawf };
	{ rank = same; 1992 ptroff };
	{ rank = same; 2005 htroff };
	{ rank = same; 2008 mandoc };

}