c1 [label="Crawling"];
t2 [label="Temporum"];
d1 [label="Database"];
+ m1 [label="Manual"];
subgraph cluster_1 {
node [shape="rectangle",fontsize=10,nodesep=0.7,ranksep=0.75,width=1];
label="Publication";
}
i2 -> c1 [ltail=cluster_0];
- i0 -> d1 [ltail=cluster_0];
+ i0 -> m1 [ltail=cluster_0];
+ m1 -> d1 [ltail=cluster_0];
c1 -> t2;
t2 -> d1;
d1 -> o2 [lhead=cluster_1];