digraph license_compatibility {
	graph [ranksep=0.5, fontname=DejaVu Sans, nodesep=0.125];
	edge [color=black];
	node [fontname=DejaVu Sans, style=filled, height=0, width=0, shape=box, fontcolor=black, color=lightgrey, \fontsize=10];

	subgraph non_copyleft {
		node[color="palegreen"];
		// rank=cluster;
		
		// http://opensource.org/proliferation-report:
		// Licenses that are popular and widely used or with strong communities	
		
		apache2[label="Apache\nLicense, v2"]; // copyleft=no, dfsg=yes, linking=yes
		bsd3c[label="3 clause BSD\n(New BSD)"]; // copyleft=no, dfsg=yes, linking=yes
		x11[label="X11 License\n(MIT License)"]; // copyleft=no, dfsg=yes, linking=yes
		
		// http://opensource.org/proliferation-report:
		// Other/Miscellaneous licenses
		
		artistic2[label="Artistic\nLicense, v2"]; // copyleft=no, dsfg=yes, linking=yes
		zlib[label="Zlib License"]; // copyleft=no, dfsg=yes, linking=yes
		
		// More licenses not mentioned in report
		
		bsd4c[label="4 clause BSD\n(Original BSD)"]; // copyleft=no, dfsg=yes, linking=yes
		bsd2c[label="2 clause BSD\n(FreeBSD)"]; // copyleft=no, dfsg=yes, linking=yes
		ms_pl[label="Microsoft\nPublic License"]; // copyleft=no, dfsg=?, linking=yes
	}
	subgraph can_link_nonfree {
		node[color="lightgoldenrod"];
		// rank=cluster;
		
		// http://opensource.org/proliferation-report:
		// Licenses that are popular and widely used or with strong communities	
		
		lgpl2[label="Lesser\nGPL, v2"]; // copyleft=yes, dfsg=yes, linking=yes
		mozilla1_1[label="Mozilla Public\nLicense, v1.1"]; // copyleft="limited", dfsg=yes, linking=yes
		cpl[label="Common\nPublic License"]; // copyleft=yes, dfsg=yes, linking=yes
		eclipse[label="Eclipse\nPublic License"]; // copyleft=yes, dfsg=?, linking=yes
		
		// http://opensource.org/proliferation-report:
		// Non-reusable licenses
		// "Many ... of these licenses fall into the category of vanity licenses."
		
		python[label="Python\nLicense"];
		
		// More licenses not mentioned in report
		
		lgpl3[label="Lesser\nGPL, v3"];
		lgpl2later[label="Lesser GPL,\nv2 or later"];
	}
	subgraph strong_copyleft {
		node[color="pink2"];
		// rank=cluster; 
		
		// http://opensource.org/proliferation-report:
		// Licenses that are popular and widely used or with strong communities	
		
		gpl2[label="GPL, v2"]; // copyleft=yes, dfsg=yes, linking=no
		cddl[label="CDDL"]; // Common Development and Distribution License: copyleft=yes, dfsg=?, linking=no
		
		// More licenses not mentioned in report
		
		gpl3[label="GPL, v3"];
		gpl2later[label="GPL, v2 or later"];
		affero1[label="Affero\nGPL, v1"]; // copyleft=yes, dfsg=yes, linking=no
		affero3[label="Affero\nGPL, v3"]; // copyleft=yes, dfsg=yes, linking=no
		affero1later[label="Affero GPL,\nv1 or later"]; // copyleft=yes, dfsg=yes, linking=no
		ms_rl[label="Microsoft\nReciprocal License"]; // copyleft=yes, dfsg=?, linking=no
	}

	gpl2later -> gpl2;
	gpl2later -> gpl3;
	lgpl2later -> lgpl2;
	lgpl2later -> lgpl3;
	lgpl2later -> gpl2later;
	lgpl2 -> gpl2;
	lgpl3 -> gpl3;
	apache2 -> gpl3;
	artistic2 -> gpl2later;
	gpl3 -> affero3;
	affero1later -> affero1;
	affero1later -> affero3;
	bsd2c -> bsd3c; // lgpl2later;
	bsd3c -> lgpl2later;
	bsd3c -> bsd4c;
	python -> lgpl2later;
	zlib -> lgpl2later;
	ms_pl -> ms_rl;
	x11 -> lgpl2later;
	
}