digraph {
	immutable_data [ label="Immutable metadata", shape="box" ];
	mutable_data [ label="Mutable metadata", shape="box" ];
	token_smart_contract [label="Token code", shape="box" ];

	network -> extension -> token -> token_smart_contract
	processor -> extension -> proof	
	extension -> meta -> mutable_data
	attachment -> proof -> immutable_data
}