subgraph cluster_meta {
	label = "Meta";
	dbversion;
}

subgraph cluster_content {
	label = "Content";
	content;
}

subgraph cluster_directory {
	label = "Directories";
	directory;
	directory_entry_dir;
	directory_entry_file;
	directory_entry_rev;
	directory_list_dir;
	directory_list_file;
	directory_list_rev;
}

subgraph cluster_revision {
	label = "Revisions";
	revision;
	revision_history;
	person;
}

subgraph cluster_release {
	label = "Releases";
	release;
}

subgraph cluster_occurrences {
	label = "Occurrences";
	occurrence;
	occurrence_history;
}

subgraph cluster_origins {
	label = "Origins";
	origin;
	fetch_history;
}

subgraph cluster_projects {
	label = "Projects";
	project;
	project_history;
}

subgraph cluster_organization {
	label = "Organizations";
	organization;
	list_history;
}

{
	edge [style = dashed];

	directory_entry_file -> content;
	directory_entry_rev -> revision;
	revision -> directory;
}