<m:diagram orientace="vodorovně">

			compound=true;

			node[shape=box];

			subgraph cluster_in {

			label = "Inputs:";

			cli;

			fstab;

			}

			subgraph cluster_tr {

			label = "Transformations:";

			grep;

			sed;

			}

			subgraph cluster_out {

			label = "Outputs:";

			xml;

			tabular;

			gui;

			}

			cli -> grep  [ltail=cluster_in, lhead=cluster_tr];

			grep -> xml [ltail=cluster_tr, lhead=cluster_out];

			// cli -> xml [ltail=cluster_in, lhead=cluster_out];

		</m:diagram>