index3.dot

digraph {
	a1 -> t1;
	a2 -> t1;
	a3 -> t1;

	a4 -> t2;
	a5 -> t2;
	a6 -> t2;

	t1 -> r1;
	t2 -> r2;

	subgraph cluster0 {
		color="#888888";
		t1[label="template.html"];
		t2[label="template.html"];
	}

	a1[label="article1.xml", style="filled", fillcolor="#cccccc"];
	a2[label="article2.xml"];
	a3[label="article3.xml"];

	a4[label="article1.xml"];
	a5[label="article2.xml", style="filled", fillcolor="#cccccc"];
	a6[label="article3.xml"];

	r1[label="result1.html"];
	r2[label="result2.html"];
}