From: ellson <devnull@localhost>
Date: Fri, 25 Jul 2008 16:28:53 +0000 (+0000)
Subject: rename all .dot in graphs/ to .gv
X-Git-Tag: LAST_LIBGRAPH~32^2~3803
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=91b2ae98445cca40782708d99318166ad4060f57;p=graphviz

rename all .dot in graphs/ to .gv
fixup "make test" to use .gv
---

diff --git a/graphs/directed/NaN.gv b/graphs/directed/NaN.gv
new file mode 100644
index 000000000..200540ca5
--- /dev/null
+++ b/graphs/directed/NaN.gv
@@ -0,0 +1,126 @@
+digraph xyz {
+orientation=landscape;
+ratio=compress;
+size="16,10";
+AbstractMemory -> Memory;
+AliasedMemory -> AliasedMemory;
+AliasedMemory -> Memory;
+Architecture -> ROOT;
+Assembly -> ROOT;
+AtomProperties -> NRAtom;
+AtomWr -> Wr;
+Break -> Break;
+Break -> Target;
+Breakpoint -> Breakpoint;
+Breakpoint -> Event;
+Breakpoint -> ROOT;
+CDB -> Target;
+CDB -> Thread;
+CommonFrame -> Target;
+ControlOps -> InterpF;
+Displayed -> Displayed;
+Displayed -> InterpTypes;
+ETimer -> RTHeapRep;
+Event -> Event;
+Event -> ROOT;
+Event -> Target;
+EventHandler -> ROOT;
+EventHandler -> StandardEvents;
+Expression -> ROOT;
+ExpressionServer -> Expression;
+FollowBreakpoint -> Breakpoint;
+Formatter -> ROOT;
+Formatter -> Thread;
+Frame -> Frame;
+Frame -> Memory;
+Frame -> Target;
+FrameClass -> Frame;
+IntIntTbl -> IntIntTbl;
+IntIntTbl -> ROOT;
+Interp -> InterpF;
+Interp -> ROOT;
+InterpF -> Interp;
+InterpF -> InterpF;
+InterpF -> ROOT;
+InterpScan -> TokenStream;
+InterpTypes -> InterpTypes;
+InterpTypes -> ROOT;
+List -> Thread;
+LoadState -> LoadState;
+LoadState -> LoadStateRep;
+LoadState -> ROOT;
+LoadStateRep -> LoadState;
+LocationRep -> Memory;
+MC68Frame -> CommonFrame;
+MC68GCommonFrame -> EventHandler;
+MUTEX  -> ROOT;
+Memory -> Displayed;
+Memory -> InterpTypes;
+MipsFrame -> CommonFrame;
+MipsFrame -> InterpTypes;
+MipsGCommonFrame -> EventHandler;
+NRAtom -> AtomProperties;
+NRAtom -> ROOT;
+NopBreakpoint -> Breakpoint;
+PSFormatter -> InterpTypes;
+PSInterp -> InterpTypes;
+PSLoadState -> InterpTypes;
+PSMemory -> InterpTypes;
+ProtectedWire -> ProtectedWire;
+ProtectedWire -> Wire;
+RTHeap -> RTHeapRep;
+RTHeapRep -> ROOT;
+Rd -> RdClass;
+RdClass -> MUTEX;
+RegisterMemory -> Memory;
+Scope -> ROOT;
+Scope -> Scope;
+Scope -> Target;
+SourceLoc -> Target;
+SourceMap -> ROOT;
+SparcFrame -> CommonFrame;
+SparcGCommonFrame -> EventHandler;
+StandardEvents -> StandardEvents;
+StandardEvents -> Target;
+StreamWire -> Wire;
+Symbol -> Displayed;
+Symbol -> Symbol;
+TThread -> ROOT;
+TThread -> Target;
+Target -> Displayed;
+Target -> Event;
+Target -> FrameClass;
+Target -> ROOT;
+Target -> TThread;
+Target -> Target;
+Target -> TargetF;
+Target -> Thread;
+TargetF -> Target;
+TargetState -> Assembly;
+TextRd -> Rd;
+TextWr -> Wr;
+Thread -> ROOT;
+Thread -> Thread;
+TokenStream -> ROOT;
+TokenStream -> TokenStream;
+Trap -> ROOT;
+TrapMemory -> Memory;
+UFileRd -> Rd;
+UFileRd -> UFileRd;
+UFileWr -> UFileWr;
+UFileWr -> Wr;
+UnixHandler -> Event;
+UnixHandler -> UnixHandler;
+UserBreak -> Break;
+UserBreak -> Breakpoint;
+UserBreak -> Event;
+UserBreak -> Trap;
+UserBreak -> UserBreak;
+VaxFrame -> CommonFrame;
+VaxGCommonFrame -> EventHandler;
+Wire -> ROOT;
+Wire -> TrapMemory;
+Wire -> Wire;
+Wr -> WrClass;
+WrClass -> MUTEX;
+}
diff --git a/graphs/directed/abstract.gv b/graphs/directed/abstract.gv
new file mode 100644
index 000000000..08955e1c6
--- /dev/null
+++ b/graphs/directed/abstract.gv
@@ -0,0 +1,71 @@
+digraph abstract {
+	size="6,6";
+	S24 -> 27;
+	S24 -> 25;
+	S1 -> 10;
+	S1 -> 2;
+	S35 -> 36;
+	S35 -> 43;
+	S30 -> 31;
+	S30 -> 33;
+	9 -> 42;
+	9 -> T1;
+	25 -> T1;
+	25 -> 26;
+	27 -> T24;
+	2 -> 3;
+	2 -> 16;
+	2 -> 17;
+	2 -> T1;
+	2 -> 18;
+	10 -> 11;
+	10 -> 14;
+	10 -> T1;
+	10 -> 13;
+	10 -> 12;
+	31 -> T1;
+	31 -> 32;
+	33 -> T30;
+	33 -> 34;
+	42 -> 4;
+	26 -> 4;
+	3 -> 4;
+	16 -> 15;
+	17 -> 19;
+	18 -> 29;
+	11 -> 4;
+	14 -> 15;
+	37 -> 39;
+	37 -> 41;
+	37 -> 38;
+	37 -> 40;
+	13 -> 19;
+	12 -> 29;
+	43 -> 38;
+	43 -> 40;
+	36 -> 19;
+	32 -> 23;
+	34 -> 29;
+	39 -> 15;
+	41 -> 29;
+	38 -> 4;
+	40 -> 19;
+	4 -> 5;
+	19 -> 21;
+	19 -> 20;
+	19 -> 28;
+	5 -> 6;
+	5 -> T35;
+	5 -> 23;
+	21 -> 22;
+	20 -> 15;
+	28 -> 29;
+	6 -> 7;
+	15 -> T1;
+	22 -> 23;
+	22 -> T35;
+	29 -> T30;
+	7 -> T8;
+	23 -> T24;
+	23 -> T1;
+}
diff --git a/graphs/directed/alf.gv b/graphs/directed/alf.gv
new file mode 100644
index 000000000..cf58f4320
--- /dev/null
+++ b/graphs/directed/alf.gv
@@ -0,0 +1,32 @@
+digraph Alf {
+size = "6,9";
+node [ shape = record ];
+Decl [ label = "\n\nDecl|{name|access|decl_flags|extern_c_linkage}"];
+Nontype_decl [ label = "Nontype_decl|{type}"];
+Defined_decl [ label = "Defined_decl|{linkage}"];
+Data_decl [ label = "Data_decl|{storage_class}"];
+Function_decl [ label = "Function_decl|{formals|defaults}"];
+Data [ label = "Data|{initializer}"];
+Function [ label = "Function|{body}"];
+Constructor [ label = "Constructor|{member_initializers}"];
+Aggregate ->  Type_decl ;
+Class -> Aggregate;
+Union -> Aggregate;
+Data -> Data_decl;
+Data -> Defn;
+Data_decl -> Defined_decl;
+Data_member ->  Nontype_decl ;
+Defined_decl -> Nontype_decl;
+Defn -> Defined_decl;
+Enum ->  Type_decl ;
+Enumerator ->  Nontype_decl ;
+Function -> Defn;
+Function -> Function_decl;
+Constructor -> Function;
+Destructor -> Function;
+Function_decl -> Defined_decl;
+Nontype_decl ->  Decl ;
+Template_type_arg ->  Type_decl ;
+Type_decl ->  Decl ;
+Typedef ->  Type_decl ;
+}
diff --git a/graphs/directed/arrows.gv b/graphs/directed/arrows.gv
new file mode 100644
index 000000000..e84b04a33
--- /dev/null
+++ b/graphs/directed/arrows.gv
@@ -0,0 +1,77 @@
+digraph G {
+	graph [rankdir=LR nodesep=0]
+	node [shape=point label=""]
+	edge [fontsize=10]
+	_box -> box [arrowhead=box label=box]
+	box -> boxbox [arrowhead=boxbox label=boxbox]
+	_box -> lbox [arrowhead=lbox label=lbox]
+	lbox -> lboxlbox [arrowhead=lboxlbox label=lboxlbox]
+	_box -> rbox [arrowhead=rbox label=rbox]
+	rbox -> rboxrbox [arrowhead=rboxrbox label=rboxrbox]
+	_box -> olbox [arrowhead=olbox label=olbox]
+	olbox -> olboxolbox [arrowhead=olboxolbox label=olboxolbox]
+	_box -> orbox [arrowhead=orbox label=orbox]
+	orbox -> orboxorbox [arrowhead=orboxorbox label=orboxorbox]
+	_box -> obox [arrowhead=obox label=obox]
+	obox -> oboxobox [arrowhead=oboxobox label=oboxobox]
+	_crow -> crow [arrowhead=crow label=crow]
+	crow -> crowcrow [arrowhead=crowcrow label=crowcrow]
+	_crow -> lcrow [arrowhead=lcrow label=lcrow]
+	lcrow -> lcrowlcrow [arrowhead=lcrowlcrow label=lcrowlcrow]
+	_crow -> rcrow [arrowhead=rcrow label=rcrow]
+	rcrow -> rcrowrcrow [arrowhead=rcrowrcrow label=rcrowrcrow]
+	_diamond -> diamond [arrowhead=diamond label=diamond]
+	diamond -> diamonddiamond [arrowhead=diamonddiamond label=diamonddiamond]
+	_diamond -> ldiamond [arrowhead=ldiamond label=ldiamond]
+	ldiamond -> ldiamondldiamond [arrowhead=ldiamondldiamond label=ldiamondldiamond]
+	_diamond -> rdiamond [arrowhead=rdiamond label=rdiamond]
+	rdiamond -> rdiamondrdiamond [arrowhead=rdiamondrdiamond label=rdiamondrdiamond]
+	_diamond -> oldiamond [arrowhead=oldiamond label=oldiamond]
+	oldiamond -> oldiamondoldiamond [arrowhead=oldiamondoldiamond label=oldiamondoldiamond]
+	_diamond -> ordiamond [arrowhead=ordiamond label=ordiamond]
+	ordiamond -> ordiamondordiamond [arrowhead=ordiamondordiamond label=ordiamondordiamond]
+	_diamond -> odiamond [arrowhead=odiamond label=odiamond]
+	odiamond -> odiamondodiamond [arrowhead=odiamondodiamond label=odiamondodiamond]
+	_dot -> dot [arrowhead=dot label=dot]
+	dot -> dotdot [arrowhead=dotdot label=dotdot]
+	_dot -> odot [arrowhead=odot label=odot]
+	odot -> odotodot [arrowhead=odotodot label=odotodot]
+	_inv -> inv [arrowhead=inv label=inv]
+	inv -> invinv [arrowhead=invinv label=invinv]
+	_inv -> linv [arrowhead=linv label=linv]
+	linv -> linvlinv [arrowhead=linvlinv label=linvlinv]
+	_inv -> rinv [arrowhead=rinv label=rinv]
+	rinv -> rinvrinv [arrowhead=rinvrinv label=rinvrinv]
+	_inv -> olinv [arrowhead=olinv label=olinv]
+	olinv -> olinvolinv [arrowhead=olinvolinv label=olinvolinv]
+	_inv -> orinv [arrowhead=orinv label=orinv]
+	orinv -> orinvorinv [arrowhead=orinvorinv label=orinvorinv]
+	_inv -> oinv [arrowhead=oinv label=oinv]
+	oinv -> oinvoinv [arrowhead=oinvoinv label=oinvoinv]
+	_none -> none [arrowhead=none label=none]
+	none -> nonenone [arrowhead=nonenone label=nonenone]
+	_normal -> normal [arrowhead=normal label=normal]
+	normal -> normalnormal [arrowhead=normalnormal label=normalnormal]
+	_normal -> lnormal [arrowhead=lnormal label=lnormal]
+	lnormal -> lnormallnormal [arrowhead=lnormallnormal label=lnormallnormal]
+	_normal -> rnormal [arrowhead=rnormal label=rnormal]
+	rnormal -> rnormalrnormal [arrowhead=rnormalrnormal label=rnormalrnormal]
+	_normal -> olnormal [arrowhead=olnormal label=olnormal]
+	olnormal -> olnormalolnormal [arrowhead=olnormalolnormal label=olnormalolnormal]
+	_normal -> ornormal [arrowhead=ornormal label=ornormal]
+	ornormal -> ornormalornormal [arrowhead=ornormalornormal label=ornormalornormal]
+	_normal -> onormal [arrowhead=onormal label=onormal]
+	onormal -> onormalonormal [arrowhead=onormalonormal label=onormalonormal]
+	_tee -> tee [arrowhead=tee label=tee]
+	tee -> teetee [arrowhead=teetee label=teetee]
+	_tee -> ltee [arrowhead=ltee label=ltee]
+	ltee -> lteeltee [arrowhead=lteeltee label=lteeltee]
+	_tee -> rtee [arrowhead=rtee label=rtee]
+	rtee -> rteertee [arrowhead=rteertee label=rteertee]
+	_vee -> vee [arrowhead=vee label=vee]
+	vee -> veevee [arrowhead=veevee label=veevee]
+	_vee -> lvee [arrowhead=lvee label=lvee]
+	lvee -> lveelvee [arrowhead=lveelvee label=lveelvee]
+	_vee -> rvee [arrowhead=rvee label=rvee]
+	rvee -> rveervee [arrowhead=rveervee label=rveervee]
+}
diff --git a/graphs/directed/awilliams.gv b/graphs/directed/awilliams.gv
new file mode 100644
index 000000000..7f01a145c
--- /dev/null
+++ b/graphs/directed/awilliams.gv
@@ -0,0 +1,188 @@
+digraph pvn {
+	ordering=out;
+
+	node_1 -> node_2;
+	node_1 [label="ID: 1\ntype: 48\nnbr out: 0\nnbr chi: 11"];
+	node_2 [label="ID: 2\ntype: 8\nnbr out: 0\nnbr chi: 0"];
+	node_1 -> node_3;
+	node_3 [label="ID: 3\ntype: 1\nnbr out: 0\nnbr chi: 0"];
+	node_1 -> node_4;
+	node_4 [label="ID: 4\ntype: 6\nnbr out: 0\nnbr chi: 0"];
+	node_1 -> node_5;
+	node_5 [label="ID: 5\ntype: 14\nnbr out: 0\nnbr chi: 0"];
+	node_1 -> node_6;
+	node_6 [label="ID: 6\ntype: 14\nnbr out: 0\nnbr chi: 0"];
+	node_1 -> node_7;
+	node_7 [label="ID: 7\ntype: 49\nnbr out: 0\nnbr chi: 0"];
+	node_7 -> node_8;
+	node_8 [label="ID: 8\ntype: 45\nnbr out: 2\nnbr chi: 0"];
+	node_8 -> node_9;
+	node_9 [label="ID: 9\ntype: 48\nnbr out: 0\nnbr chi: 4"];
+	node_9 -> node_10;
+	node_10 [label="ID: 10\ntype: 8\nnbr out: 0\nnbr chi: 0"];
+	node_9 -> node_11;
+	node_11 [label="ID: 11\ntype: 1\nnbr out: 0\nnbr chi: 0"];
+	node_9 -> node_12;
+	node_12 [label="ID: 12\ntype: 5\nnbr out: 0\nnbr chi: 0"];
+	node_9 -> node_13;
+	node_13 [label="ID: 13\ntype: 16\nnbr out: 0\nnbr chi: 0"];
+	node_8 -> node_14;
+	node_14 [label="ID: 14\ntype: 39\nnbr out: 1\nnbr chi: 0"];
+	node_14 -> node_15;
+	node_15 [label="ID: 15\ntype: 55\nnbr out: 0\nnbr chi: 0"];
+	node_15 -> node_16;
+	node_16 [label="ID: 16\ntype: 48\nnbr out: 0\nnbr chi: 3"];
+	node_16 -> node_17;
+	node_17 [label="ID: 17\ntype: 1\nnbr out: 0\nnbr chi: 0"];
+	node_16 -> node_18;
+	node_18 [label="ID: 18\ntype: 6\nnbr out: 0\nnbr chi: 0"];
+	node_16 -> node_19;
+	node_19 [label="ID: 19\ntype: 45\nnbr out: 1\nnbr chi: 0"];
+	node_19 -> node_20;
+	node_20 [label="ID: 20\ntype: 48\nnbr out: 0\nnbr chi: 5"];
+	node_20 -> node_21;
+	node_21 [label="ID: 21\ntype: 38\nnbr out: 0\nnbr chi: 0"];
+	node_20 -> node_22;
+	node_22 [label="ID: 22\ntype: 8\nnbr out: 0\nnbr chi: 0"];
+	node_20 -> node_23;
+	node_23 [label="ID: 23\ntype: 1\nnbr out: 0\nnbr chi: 0"];
+	node_20 -> node_24;
+	node_24 [label="ID: 24\ntype: 5\nnbr out: 0\nnbr chi: 0"];
+	node_20 -> node_25;
+	node_25 [label="ID: 25\ntype: 16\nnbr out: 0\nnbr chi: 0"];
+	node_19 -> node_26;
+	node_26 [label="ID: 26\ntype: 41\nnbr out: 12\nnbr chi: 0"];
+	node_26 -> node_27;
+	node_27 [label="ID: 27\ntype: 48\nnbr out: 0\nnbr chi: 5"];
+	node_27 -> node_28;
+	node_28 [label="ID: 28\ntype: 38\nnbr out: 0\nnbr chi: 0"];
+	node_27 -> node_29;
+	node_29 [label="ID: 29\ntype: 8\nnbr out: 0\nnbr chi: 0"];
+	node_27 -> node_30;
+	node_30 [label="ID: 30\ntype: 1\nnbr out: 0\nnbr chi: 0"];
+	node_27 -> node_31;
+	node_31 [label="ID: 31\ntype: 5\nnbr out: 0\nnbr chi: 0"];
+	node_27 -> node_32;
+	node_32 [label="ID: 32\ntype: 16\nnbr out: 0\nnbr chi: 0"];
+	node_26 -> node_27;
+	node_26 -> node_27;
+	node_26 -> node_27;
+	node_26 -> node_27;
+	node_26 -> node_27;
+	node_26 -> node_27;
+	node_26 -> node_27;
+	node_26 -> node_27;
+	node_26 -> node_27;
+	node_26 -> node_27;
+	node_26 -> node_27;
+	node_26 -> node_33;
+	node_33 [label="ID: 33\ntype: 48\nnbr out: 0\nnbr chi: 5"];
+	node_33 -> node_34;
+	node_34 [label="ID: 34\ntype: 38\nnbr out: 0\nnbr chi: 0"];
+	node_33 -> node_35;
+	node_35 [label="ID: 35\ntype: 14\nnbr out: 0\nnbr chi: 0"];
+	node_33 -> node_36;
+	node_36 [label="ID: 36\ntype: 14\nnbr out: 0\nnbr chi: 0"];
+	node_33 -> node_37;
+	node_37 [label="ID: 37\ntype: 20\nnbr out: 0\nnbr chi: 0"];
+	node_33 -> node_38;
+	node_38 [label="ID: 38\ntype: 16\nnbr out: 0\nnbr chi: 0"];
+	node_15 -> node_39;
+	node_39 [label="ID: 39\ntype: 45\nnbr out: 1\nnbr chi: 0"];
+	node_39 -> node_40;
+	node_40 [label="ID: 40\ntype: 16\nnbr out: 0\nnbr chi: 0"];
+	node_39 -> node_41;
+	node_41 [label="ID: 41\ntype: 48\nnbr out: 0\nnbr chi: 3"];
+	node_41 -> node_42;
+	node_42 [label="ID: 42\ntype: 14\nnbr out: 0\nnbr chi: 0"];
+	node_41 -> node_43;
+	node_43 [label="ID: 43\ntype: 1\nnbr out: 0\nnbr chi: 0"];
+	node_41 -> node_44;
+	node_44 [label="ID: 44\ntype: 6\nnbr out: 0\nnbr chi: 0"];
+	node_15 -> node_45;
+	node_45 [label="ID: 45\ntype: 48\nnbr out: 0\nnbr chi: 4"];
+	node_45 -> node_46;
+	node_46 [label="ID: 46\ntype: 14\nnbr out: 0\nnbr chi: 0"];
+	node_45 -> node_47;
+	node_47 [label="ID: 47\ntype: 45\nnbr out: 1\nnbr chi: 0"];
+	node_47 -> node_48;
+	node_48 [label="ID: 48\ntype: 14\nnbr out: 0\nnbr chi: 0"];
+	node_47 -> node_49;
+	node_49 [label="ID: 49\ntype: 14\nnbr out: 0\nnbr chi: 0"];
+	node_45 -> node_50;
+	node_50 [label="ID: 50\ntype: 14\nnbr out: 0\nnbr chi: 0"];
+	node_45 -> node_51;
+	node_51 [label="ID: 51\ntype: 45\nnbr out: 1\nnbr chi: 0"];
+	node_51 -> node_52;
+	node_52 [label="ID: 52\ntype: 45\nnbr out: 1\nnbr chi: 0"];
+	node_52 -> node_53;
+	node_53 [label="ID: 53\ntype: 54\nnbr out: 0\nnbr chi: 0"];
+	node_52 -> node_54;
+	node_54 [label="ID: 54\ntype: 16\nnbr out: 0\nnbr chi: 0"];
+	node_51 -> node_55;
+	node_55 [label="ID: 55\ntype: 48\nnbr out: 0\nnbr chi: 3"];
+	node_55 -> node_56;
+	node_56 [label="ID: 56\ntype: 14\nnbr out: 0\nnbr chi: 0"];
+	node_55 -> node_57;
+	node_57 [label="ID: 57\ntype: 1\nnbr out: 0\nnbr chi: 0"];
+	node_55 -> node_58;
+	node_58 [label="ID: 58\ntype: 6\nnbr out: 0\nnbr chi: 0"];
+	node_15 -> node_59;
+	node_59 [label="ID: 59\ntype: 48\nnbr out: 0\nnbr chi: 5"];
+	node_59 -> node_60;
+	node_60 [label="ID: 60\ntype: 38\nnbr out: 0\nnbr chi: 0"];
+	node_59 -> node_61;
+	node_61 [label="ID: 61\ntype: 8\nnbr out: 0\nnbr chi: 0"];
+	node_59 -> node_62;
+	node_62 [label="ID: 62\ntype: 1\nnbr out: 0\nnbr chi: 0"];
+	node_59 -> node_63;
+	node_63 [label="ID: 63\ntype: 5\nnbr out: 0\nnbr chi: 0"];
+	node_59 -> node_64;
+	node_64 [label="ID: 64\ntype: 16\nnbr out: 0\nnbr chi: 0"];
+	node_15 -> node_65;
+	node_65 [label="ID: 65\ntype: 48\nnbr out: 0\nnbr chi: 5"];
+	node_65 -> node_66;
+	node_66 [label="ID: 66\ntype: 38\nnbr out: 0\nnbr chi: 0"];
+	node_65 -> node_67;
+	node_67 [label="ID: 67\ntype: 14\nnbr out: 0\nnbr chi: 0"];
+	node_65 -> node_68;
+	node_68 [label="ID: 68\ntype: 14\nnbr out: 0\nnbr chi: 0"];
+	node_65 -> node_69;
+	node_69 [label="ID: 69\ntype: 20\nnbr out: 0\nnbr chi: 0"];
+	node_65 -> node_70;
+	node_70 [label="ID: 70\ntype: 16\nnbr out: 0\nnbr chi: 0"];
+	node_14 -> node_71;
+	node_71 [label="ID: 71\ntype: 45\nnbr out: 1\nnbr chi: 0"];
+	node_71 -> node_72;
+	node_72 [label="ID: 72\ntype: 16\nnbr out: 0\nnbr chi: 0"];
+	node_71 -> node_73;
+	node_73 [label="ID: 73\ntype: 48\nnbr out: 0\nnbr chi: 3"];
+	node_73 -> node_74;
+	node_74 [label="ID: 74\ntype: 14\nnbr out: 0\nnbr chi: 0"];
+	node_73 -> node_75;
+	node_75 [label="ID: 75\ntype: 1\nnbr out: 0\nnbr chi: 0"];
+	node_73 -> node_76;
+	node_76 [label="ID: 76\ntype: 6\nnbr out: 0\nnbr chi: 0"];
+	node_8 -> node_77;
+	node_77 [label="ID: 77\ntype: 45\nnbr out: 1\nnbr chi: 0"];
+	node_77 -> node_78;
+	node_78 [label="ID: 78\ntype: 16\nnbr out: 0\nnbr chi: 0"];
+	node_77 -> node_79;
+	node_79 [label="ID: 79\ntype: 48\nnbr out: 0\nnbr chi: 3"];
+	node_79 -> node_80;
+	node_80 [label="ID: 80\ntype: 14\nnbr out: 0\nnbr chi: 0"];
+	node_79 -> node_81;
+	node_81 [label="ID: 81\ntype: 1\nnbr out: 0\nnbr chi: 0"];
+	node_79 -> node_82;
+	node_82 [label="ID: 82\ntype: 6\nnbr out: 0\nnbr chi: 0"];
+	node_1 -> node_83;
+	node_83 [label="ID: 83\ntype: 38\nnbr out: 0\nnbr chi: 0"];
+	node_1 -> node_84;
+	node_84 [label="ID: 84\ntype: 8\nnbr out: 0\nnbr chi: 0"];
+	node_1 -> node_85;
+	node_85 [label="ID: 85\ntype: 1\nnbr out: 0\nnbr chi: 0"];
+	node_1 -> node_86;
+	node_86 [label="ID: 86\ntype: 5\nnbr out: 0\nnbr chi: 0"];
+	node_1 -> node_87;
+	node_87 [label="ID: 87\ntype: 16\nnbr out: 0\nnbr chi: 0"];
+}
diff --git a/graphs/directed/clust.gv b/graphs/directed/clust.gv
new file mode 100644
index 000000000..319d5ca44
--- /dev/null
+++ b/graphs/directed/clust.gv
@@ -0,0 +1,22 @@
+digraph G {
+	subgraph cluster_0 {
+		label = "hello world";
+		a -> b;
+		a -> c;
+		color = hotpink;
+	}
+
+	subgraph cluster_1 {
+		label = "MSDOT";
+		style= "dashed";
+		color=purple;
+		x -> y;
+		x -> z;
+		y -> z;
+		y -> q;
+	}
+
+	top -> a;
+	top -> y;
+	y -> b;
+}
diff --git a/graphs/directed/clust1.gv b/graphs/directed/clust1.gv
new file mode 100644
index 000000000..71c472250
--- /dev/null
+++ b/graphs/directed/clust1.gv
@@ -0,0 +1,8 @@
+digraph G {
+	subgraph cluster_c0 {a0 -> a1 -> a2 -> a3;}
+	subgraph cluster_c1 {b0 -> b1 -> b2 -> b3;}
+	x -> a0;
+	x -> b0;
+	a1 -> a3;
+	a3 -> a0;
+}
diff --git a/graphs/directed/clust2.gv b/graphs/directed/clust2.gv
new file mode 100644
index 000000000..27cc5884f
--- /dev/null
+++ b/graphs/directed/clust2.gv
@@ -0,0 +1,8 @@
+digraph G {
+	subgraph cluster_c0 {a0 -> a1 -> a2 -> a3;}
+	subgraph cluster_c1 {b0 -> b1 -> b2 -> b3;}
+	x -> a0;
+	x -> b0;
+	a1 -> b3;
+	b3 -> a1;
+}
diff --git a/graphs/directed/clust3.gv b/graphs/directed/clust3.gv
new file mode 100644
index 000000000..6efae4243
--- /dev/null
+++ b/graphs/directed/clust3.gv
@@ -0,0 +1,8 @@
+digraph G {
+	subgraph cluster_c0 {a0 -> a1 -> a2 -> a3;}
+	subgraph cluster_c1 {b0 -> b1 -> b2 -> b3;}
+	x -> a0;
+	x -> b0;
+	a1 -> b3;
+	b1 -> a3;
+}
diff --git a/graphs/directed/clust4.gv b/graphs/directed/clust4.gv
new file mode 100644
index 000000000..67dcd4c24
--- /dev/null
+++ b/graphs/directed/clust4.gv
@@ -0,0 +1,27 @@
+digraph G {
+
+	subgraph cluster_0 {
+		style=filled;
+		color=lightgrey;
+		node [style=filled,color=white];
+		a0 -> a1 -> a2 -> a3;
+		label = "process #1";
+	}
+
+	subgraph cluster_1 {
+		node [style=filled];
+		b0 -> b1 -> b2 -> b3;
+		label = "process #2";
+		color=blue
+	}
+	start -> a0;
+	start -> b0;
+	a1 -> b3;
+	b2 -> a3;
+	a3 -> a0;
+	a3 -> end;
+	b3 -> end;
+
+	start [shape=Mdiamond];
+	end [shape=Msquare];
+}
diff --git a/graphs/directed/clust5.gv b/graphs/directed/clust5.gv
new file mode 100644
index 000000000..5edc2ce92
--- /dev/null
+++ b/graphs/directed/clust5.gv
@@ -0,0 +1,25 @@
+digraph G {
+size="6,6";
+	a -> b -> c;
+
+	subgraph cluster0 {
+		x0 -> y0;
+		x0 -> z0;
+	}
+
+	subgraph cluster1 {
+		x1 -> y1;
+		x1 -> z1;
+	}
+
+	subgraph cluster2 {
+		x2 -> y2;
+		x2 -> z2;
+	}
+
+	a -> x0;
+	b -> x1;
+	b -> x2;
+	a -> z2;
+	c -> z1;
+}
diff --git a/graphs/directed/crazy.gv b/graphs/directed/crazy.gv
new file mode 100644
index 000000000..b51d4987f
--- /dev/null
+++ b/graphs/directed/crazy.gv
@@ -0,0 +1,104 @@
+digraph "unix" {
+	graph [	fontname = "Helvetica-Oblique",
+		fontsize = 36,
+		label = "\n\n\n\nObject Oriented Graphs\nStephen North, 3/19/93",
+		size = "6,6" ];
+	node [	shape = polygon,
+		sides = 4,
+		distortion = "0.0",
+		orientation = "0.0",
+		skew = "0.0",
+		color = white,
+		style = filled,
+		fontname = "Helvetica-Outline" ];
+	"5th Edition" [sides=9, distortion="0.936354", orientation=28, skew="-0.126818", color=salmon2];
+	"6th Edition" [sides=5, distortion="0.238792", orientation=11, skew="0.995935", color=deepskyblue];
+	"PWB 1.0" [sides=8, distortion="0.019636", orientation=79, skew="-0.440424", color=goldenrod2];
+	LSX [sides=9, distortion="-0.698271", orientation=22, skew="-0.195492", color=burlywood2];
+	"1 BSD" [sides=7, distortion="0.265084", orientation=26, skew="0.403659", color=gold1];
+	"Mini Unix" [distortion="0.039386", orientation=2, skew="-0.461120", color=greenyellow];
+	Wollongong [sides=5, distortion="0.228564", orientation=63, skew="-0.062846", color=darkseagreen];
+	Interdata [distortion="0.624013", orientation=56, skew="0.101396", color=dodgerblue1];
+	"Unix/TS 3.0" [sides=8, distortion="0.731383", orientation=43, skew="-0.824612", color=thistle2];
+	"PWB 2.0" [sides=6, distortion="0.592100", orientation=34, skew="-0.719269", color=darkolivegreen3];
+	"7th Edition" [sides=10, distortion="0.298417", orientation=65, skew="0.310367", color=chocolate];
+	"8th Edition" [distortion="-0.997093", orientation=50, skew="-0.061117", color=turquoise3];
+	"32V" [sides=7, distortion="0.878516", orientation=19, skew="0.592905", color=steelblue3];
+	V7M [sides=10, distortion="-0.960249", orientation=32, skew="0.460424", color=navy];
+	"Ultrix-11" [sides=10, distortion="-0.633186", orientation=10, skew="0.333125", color=darkseagreen4];
+	Xenix [sides=8, distortion="-0.337997", orientation=52, skew="-0.760726", color=coral];
+	"UniPlus+" [sides=7, distortion="0.788483", orientation=39, skew="-0.526284", color=darkolivegreen3];
+	"9th Edition" [sides=7, distortion="0.138690", orientation=55, skew="0.554049", color=coral3];
+	"2 BSD" [sides=7, distortion="-0.010661", orientation=84, skew="0.179249", color=blanchedalmond];
+	"2.8 BSD" [distortion="-0.239422", orientation=44, skew="0.053841", color=lightskyblue1];
+	"2.9 BSD" [distortion="-0.843381", orientation=70, skew="-0.601395", color=aquamarine2];
+	"3 BSD" [sides=10, distortion="0.251820", orientation=18, skew="-0.530618", color=lemonchiffon];
+	"4 BSD" [sides=5, distortion="-0.772300", orientation=24, skew="-0.028475", color=darkorange1];
+	"4.1 BSD" [distortion="-0.226170", orientation=38, skew="0.504053", color=lightyellow1];
+	"4.2 BSD" [sides=10, distortion="-0.807349", orientation=50, skew="-0.908842", color=darkorchid4];
+	"4.3 BSD" [sides=10, distortion="-0.030619", orientation=76, skew="0.985021", color=lemonchiffon2];
+	"Ultrix-32" [distortion="-0.644209", orientation=21, skew="0.307836", color=goldenrod3];
+	"PWB 1.2" [sides=7, distortion="0.640971", orientation=84, skew="-0.768455", color=cyan];
+	"USG 1.0" [distortion="0.758942", orientation=42, skew="0.039886", color=blue];
+	"CB Unix 1" [sides=9, distortion="-0.348692", orientation=42, skew="0.767058", color=firebrick];
+	"USG 2.0" [distortion="0.748625", orientation=74, skew="-0.647656", color=chartreuse4];
+	"CB Unix 2" [sides=10, distortion="0.851818", orientation=32, skew="-0.020120", color=greenyellow];
+	"CB Unix 3" [sides=10, distortion="0.992237", orientation=29, skew="0.256102", color=bisque4];
+	"Unix/TS++" [sides=6, distortion="0.545461", orientation=16, skew="0.313589", color=mistyrose2];
+	"PDP-11 Sys V" [sides=9, distortion="-0.267769", orientation=40, skew="0.271226", color=cadetblue1];
+	"USG 3.0" [distortion="-0.848455", orientation=44, skew="0.267152", color=bisque2];
+	"Unix/TS 1.0" [distortion="0.305594", orientation=75, skew="0.070516", color=orangered];
+	"TS 4.0" [sides=10, distortion="-0.641701", orientation=50, skew="-0.952502", color=crimson];
+	"System V.0" [sides=9, distortion="0.021556", orientation=26, skew="-0.729938", color=darkorange1];
+	"System V.2" [sides=6, distortion="0.985153", orientation=33, skew="-0.399752", color=darkolivegreen4];
+	"System V.3" [sides=7, distortion="-0.687574", orientation=58, skew="-0.180116", color=lightsteelblue1];
+	"5th Edition" -> "6th Edition";
+	"5th Edition" -> "PWB 1.0";
+	"6th Edition" -> LSX;
+	"6th Edition" -> "1 BSD";
+	"6th Edition" -> "Mini Unix";
+	"6th Edition" -> Wollongong;
+	"6th Edition" -> Interdata;
+	Interdata -> "Unix/TS 3.0";
+	Interdata -> "PWB 2.0";
+	Interdata -> "7th Edition";
+	"7th Edition" -> "8th Edition";
+	"7th Edition" -> "32V";
+	"7th Edition" -> V7M;
+	"7th Edition" -> "Ultrix-11";
+	"7th Edition" -> Xenix;
+	"7th Edition" -> "UniPlus+";
+	V7M -> "Ultrix-11";
+	"8th Edition" -> "9th Edition";
+	"1 BSD" -> "2 BSD";
+	"2 BSD" -> "2.8 BSD";
+	"2.8 BSD" -> "Ultrix-11";
+	"2.8 BSD" -> "2.9 BSD";
+	"32V" -> "3 BSD";
+	"3 BSD" -> "4 BSD";
+	"4 BSD" -> "4.1 BSD";
+	"4.1 BSD" -> "4.2 BSD";
+	"4.1 BSD" -> "2.8 BSD";
+	"4.1 BSD" -> "8th Edition";
+	"4.2 BSD" -> "4.3 BSD";
+	"4.2 BSD" -> "Ultrix-32";
+	"PWB 1.0" -> "PWB 1.2";
+	"PWB 1.0" -> "USG 1.0";
+	"PWB 1.2" -> "PWB 2.0";
+	"USG 1.0" -> "CB Unix 1";
+	"USG 1.0" -> "USG 2.0";
+	"CB Unix 1" -> "CB Unix 2";
+	"CB Unix 2" -> "CB Unix 3";
+	"CB Unix 3" -> "Unix/TS++";
+	"CB Unix 3" -> "PDP-11 Sys V";
+	"USG 2.0" -> "USG 3.0";
+	"USG 3.0" -> "Unix/TS 3.0";
+	"PWB 2.0" -> "Unix/TS 3.0";
+	"Unix/TS 1.0" -> "Unix/TS 3.0";
+	"Unix/TS 3.0" -> "TS 4.0";
+	"Unix/TS++" -> "TS 4.0";
+	"CB Unix 3" -> "TS 4.0";
+	"TS 4.0" -> "System V.0";
+	"System V.0" -> "System V.2";
+	"System V.2" -> "System V.3";
+}
diff --git a/graphs/directed/ctext.gv b/graphs/directed/ctext.gv
new file mode 100644
index 000000000..71e8cd3ec
--- /dev/null
+++ b/graphs/directed/ctext.gv
@@ -0,0 +1,17 @@
+digraph G {
+	xyz [label = "hello\nworld",color="slateblue",fontsize=24,fontname="Palatino-Italic",style=filled,fontcolor="hotpink"];
+	node [style=filled];
+	red [color=red];
+	green [color=green];
+	blue [color=blue,fontcolor=black];
+	cyan [color=cyan];
+	magenta [color=magenta];
+	yellow [color=yellow];
+	orange [color=orange];
+	red -> green;
+	red -> blue;
+	blue -> cyan;
+	blue -> magenta;
+	green -> yellow;
+	green -> orange;
+}
diff --git a/graphs/directed/dfa.gv b/graphs/directed/dfa.gv
new file mode 100644
index 000000000..fde068023
--- /dev/null
+++ b/graphs/directed/dfa.gv
@@ -0,0 +1,34 @@
+digraph g {
+"start" [ label = "MWGC-" ];
+"n1" [ label = "WC-MG" ];
+"n2" [ label = "MWC-G" ];
+"n3" [ label = "C-MWG" ];
+"n4" [ label = "W-MGC" ];
+"n5" [ label = "MGC-W" ];
+"n6" [ label = "MWG-C" ];
+"n7" [ label = "G-MWC" ];
+"n8" [ label = "MG-WC" ];
+"n9" [ label = "-MWGC" ];
+"start" -> "n1" [ label = "g" ];
+"n1" -> "start" [ label = "g" ];
+subgraph l { rank = same; "n3" "n4" }
+subgraph r { rank = same; "n5" "n6" }
+"n1" -> "n2" [ label = "m" ];
+"n2" -> "n1" [ label = "m" ];
+"n2" -> "n3" [ label = "w" ];
+"n3" -> "n2" [ label = "w" ];
+"n2" -> "n4" [ label = "c" ];
+"n4" -> "n2" [ label = "c" ];
+"n3" -> "n5" [ label = "g" ];
+"n5" -> "n3" [ label = "g" ];
+"n4" -> "n6" [ label = "g" ];
+"n6" -> "n4" [ label = "g" ];
+"n5" -> "n7" [ label = "c" ];
+"n7" -> "n5" [ label = "c" ];
+"n6" -> "n7" [ label = "w" ];
+"n7" -> "n6" [ label = "w" ];
+"n7" -> "n8" [ label = "m" ];
+"n8" -> "n7" [ label = "m" ];
+"n8" -> "n9" [ label = "g" ];
+"n9" -> "n8" [ label = "g" ];
+}
diff --git a/graphs/directed/fig6.gv b/graphs/directed/fig6.gv
new file mode 100644
index 000000000..8749fd385
--- /dev/null
+++ b/graphs/directed/fig6.gv
@@ -0,0 +1,74 @@
+digraph G {
+	size = "8,8";
+	{rank=min S8 S24 S1 S35 S30}
+	{rank=max T8 T24 T1 T35 T30}
+	S8 -> 9;
+	S24 -> 27;
+	S24 -> 25;
+	S1 -> 10;
+	S1 -> 2;
+	S35 -> 36;
+	S35 -> 43;
+	S30 -> 31;
+	S30 -> 33;
+	9 -> 42;
+	9 -> T1;
+	25 -> T1;
+	25 -> 26;
+	27 -> T24;
+	2 -> 3;
+	2 -> 16;
+	2 -> 17;
+	2 -> T1;
+	2 -> 18;
+	10 -> 11;
+	10 -> 14;
+	10 -> T1;
+	10 -> 13;
+	10 -> 12;
+	31 -> T1;
+	31 -> 32;
+	33 -> T30;
+	33 -> 34;
+	42 -> 4;
+	26 -> 4;
+	3 -> 4;
+	16 -> 15;
+	17 -> 19;
+	18 -> 29;
+	11 -> 4;
+	14 -> 15;
+	37 -> 39;
+	37 -> 41;
+	37 -> 38;
+	37 -> 40;
+	13 -> 19;
+	12 -> 29;
+	43 -> 38;
+	43 -> 40;
+	36 -> 19;
+	32 -> 23;
+	34 -> 29;
+	39 -> 15;
+	41 -> 29;
+	38 -> 4;
+	40 -> 19;
+	4 -> 5;
+	19 -> 21;
+	19 -> 20;
+	19 -> 28;
+	5 -> 6;
+	5 -> T35;
+	5 -> 23;
+	21 -> 22;
+	20 -> 15;
+	28 -> 29;
+	6 -> 7;
+	15 -> T1;
+	22 -> 23;
+	22 -> T35;
+	29 -> T30;
+	7 -> T8;
+	23 -> T24;
+	23 -> T1;
+}
diff --git a/graphs/directed/fsm.gv b/graphs/directed/fsm.gv
new file mode 100644
index 000000000..9243e5a6d
--- /dev/null
+++ b/graphs/directed/fsm.gv
@@ -0,0 +1,20 @@
+digraph finite_state_machine {
+
+	node [shape = doublecircle]; LR_0 LR_3 LR_4 LR_8;
+	node [shape = circle];
+	rankdir=LR;
+	LR_0 -> LR_2 [ label = "SS(B)" ];
+	LR_0 -> LR_1 [ label = "SS(S)" ];
+	LR_1 -> LR_3 [ label = "S($end)" ];
+	LR_2 -> LR_6 [ label = "SS(b)" ];
+	LR_2 -> LR_5 [ label = "SS(a)" ];
+	LR_2 -> LR_4 [ label = "S(A)" ];
+	LR_5 -> LR_7 [ label = "S(b)" ];
+	LR_5 -> LR_5 [ label = "S(a)" ];
+	LR_6 -> LR_6 [ label = "S(b)" ];
+	LR_6 -> LR_5 [ label = "S(a)" ];
+	LR_7 -> LR_8 [ label = "S(b)" ];
+	LR_7 -> LR_5 [ label = "S(a)" ];
+	LR_8 -> LR_6 [ label = "S(b)" ];
+	LR_8 -> LR_5 [ label = "S(a)" ];
+}
diff --git a/graphs/directed/grammar.gv b/graphs/directed/grammar.gv
new file mode 100644
index 000000000..34172112f
--- /dev/null
+++ b/graphs/directed/grammar.gv
@@ -0,0 +1,71 @@
+digraph L0 {
+	size = "8,8";
+	ordering=out;
+	node [shape = box];
+
+	n0 [label="E"];
+	n1 [label="T"];
+	n2 [label="F"];
+	n3 [label="IDENT : a "];
+	n4 [label="+"];
+	n5 [label="T"];
+	n6 [label="F"];
+	n7 [label="("];
+	n8 [label="E"];
+	n9 [label="T"];
+	n10 [label="F"];
+	n11 [label="IDENT : b "];
+	n12 [label="*"];
+	n13 [label="F"];
+	n14 [label="IDENT : c "];
+	n15 [label=")"];
+	n16 [label="*"];
+	n17 [label="F"];
+	n18 [label="("];
+	n19 [label="E"];
+	n20 [label="T"];
+	n21 [label="F"];
+	n22 [label="IDENT : d "];
+	n23 [label="*"];
+	n24 [label="F"];
+	n25 [label="IDENT : e "];
+	n26 [label="+"];
+	n27 [label="T"];
+	n28 [label="F"];
+	n29 [label="("];
+	n30 [label="E"];
+	n31 [label="T"];
+	n32 [label="F"];
+	n33 [label="IDENT : a "];
+	n34 [label="*"];
+	n35 [label="F"];
+	n36 [label="IDENT : b "];
+	n37 [label=")"];
+	n38 [label=")"];
+	n39 [label="+"];
+	n40 [label="T"];
+	n41 [label="F"];
+	n42 [label="IDENT : q "];
+	n0 ->	{ n1 n4 n5 n39 n40 };
+	n1 ->	n2 ;
+	n2 ->	n3 ;
+	n5 ->	{ n6 n16 n17 };
+	n6 ->	{ n7 n8 n15 };
+	n8 ->	n9 ;
+	n9 ->	{ n10 n12 n13 };
+	n10 ->	n11 ;
+	n13 ->	n14 ;
+	n17 ->	{ n18 n19 n38 };
+	n19 ->	{ n20 n26 n27 };
+	n20 ->	{ n21 n23 n24 };
+	n21 ->	n22 ;
+	n24 ->	n25 ;
+	n27 ->	n28 ;
+	n28 ->	{ n29 n30 n37 };
+	n30 ->	n31 ;
+	n31 ->	{ n32 n34 n35 };
+	n32 ->	n33 ;
+	n35 ->	n36 ;
+	n40 ->	n41 ;
+	n41 ->	n42 ;
+}
diff --git a/graphs/directed/hashtable.gv b/graphs/directed/hashtable.gv
new file mode 100644
index 000000000..8659cb4d9
--- /dev/null
+++ b/graphs/directed/hashtable.gv
@@ -0,0 +1,23 @@
+digraph G {
+	nodesep=.05;
+	rankdir=LR;
+	node [shape=record,width=.1,height=.1];
+
+	node0 [label = "<f0> |<f1> |<f2> |<f3> |<f4> |<f5> |<f6> | ",height=2.0];
+	node [width = 1.5];
+	node1 [label = "{<n> n14 | 719 |<p> }"];
+	node2 [label = "{<n> a1  | 805 |<p> }"];
+	node3 [label = "{<n> i9  | 718 |<p> }"];
+	node4 [label = "{<n> e5  | 989 |<p> }"];
+	node5 [label = "{<n> t20 | 959 |<p> }"] ;
+	node6 [label = "{<n> o15 | 794 |<p> }"] ;
+	node7 [label = "{<n> s19 | 659 |<p> }"] ;
+
+	node0:f0 -> node1:n;
+	node0:f1 -> node2:n;
+	node0:f2 -> node3:n;
+	node0:f5 -> node4:n;
+	node0:f6 -> node5:n;
+	node2:p -> node6:n;
+	node4:p -> node7:n;
+}
diff --git a/graphs/directed/honda-tokoro.gv b/graphs/directed/honda-tokoro.gv
new file mode 100644
index 000000000..38dcc189d
--- /dev/null
+++ b/graphs/directed/honda-tokoro.gv
@@ -0,0 +1,76 @@
+digraph "Honda-Tokoro" {
+rankdir="LR" ranksep="0.2" edge[labelfontsize="8" fontsize="8" labeldistance="0.8" arrowsize="0.9" labelangle="-30" dir="none"] nodesep="0.2" node[width="0" height="0" fontsize="10"]
+
+/*Net net00*/
+
+n000 [label="z"]
+n001->n000 [headlabel=":s:" arrowhead="invdot"]
+n001 [label="m"]
+n002->n001 [samehead="m002" headlabel=":r:" samearrowhead="1" arrowhead="invdot" arrowtail="inv"]
+n002 [label="p1"]
+n003->n002 [headlabel=":s:" arrowhead="dot"]
+n003 [label="b"]
+n004->n003 
+n004 [label="x1"]
+n022->n004 [weight="0" headlabel=":s/r:" fontsize="8" arrowhead="invdot"]
+n003->n002 [samehead="m000" fontsize="8" samearrowhead="1" arrowtail="inv"]
+n005->n002 [samehead="m000" headlabel=":u:" fontsize="8" samearrowhead="1" arrowhead="dot" arrowtail="inv"]
+n005->n001 [samehead="m002" samearrowhead="1"]
+n005 [label="b"]
+n006->n005 [arrowtail="inv"]
+n006 [label="p2"]
+n007->n006 [headlabel=":s:" arrowhead="dot"]
+n007 [label="b"]
+n008->n007 
+n008 [label="x2"]
+n022->n008 [weight="0" headlabel=":s/r:" fontsize="8" arrowhead="invdot"]
+n007->n006 [samehead="m001" headlabel=":u:" fontsize="8" samearrowhead="1" arrowhead="dot" arrowtail="inv"]
+n009->n006 [samehead="m001" samearrowhead="1" arrowtail="inv"]
+n009 [label="b2"]
+n022->n009 [fontsize="8"]
+n022->n009 [fontsize="8"]
+n010->n006 [samehead="m001" samearrowhead="1" arrowtail="inv"]
+n010 [label="b2"]
+n022->n010 [fontsize="8"]
+n022->n010 [fontsize="8"]
+n011->n000 [headlabel=":r:" arrowhead="invdot" arrowtail="inv"]
+n011 [label="n"]
+n012->n011 [samehead="m005" headlabel=":s:" samearrowhead="1" arrowhead="dot"]
+n012 [label="b"]
+n013->n012 
+n013 [label="c1"]
+n014->n013 [headlabel=":r:" arrowhead="invdot"]
+n014 [label="b"]
+n015->n014 [arrowtail="inv"]
+n015 [label="y1"]
+n023->n015 [weight="0" headlabel=":s/r:" fontsize="8" arrowhead="dot"]
+n016->n015 [samehead="m003" headlabel=":u:" fontsize="8" samearrowhead="1" arrowhead="dot" arrowtail="inv"]
+n018->n015 [samehead="m003" fontsize="8" samearrowhead="1" arrowtail="inv"]
+n014->n011 [samehead="m006" headlabel=":u:" fontsize="8" samearrowhead="1" arrowhead="dot" arrowtail="inv"]
+n012->n011 [samehead="m006" fontsize="8" samearrowhead="1" arrowtail="inv"]
+n016->n011 [samehead="m005" samearrowhead="1"]
+n016 [label="b"]
+n017->n016 
+n017 [label="c2"]
+n018->n017 [headlabel=":r:" arrowhead="invdot"]
+n018 [label="b"]
+n019->n018 [arrowtail="inv"]
+n019 [label="y2"]
+n023->n019 [weight="0" headlabel=":s/r:" fontsize="8" arrowhead="dot"]
+n020->n019 [samehead="m004" headlabel=":u:" samearrowhead="1" arrowhead="dot" arrowtail="inv"]
+n020 [label="b2"]
+n023->n020 [fontsize="8"]
+n023->n020 [fontsize="8"]
+n021->n019 [samehead="m004" samearrowhead="1" arrowtail="inv"]
+n021 [label="b2"]
+n023->n021 [fontsize="8"]
+n023->n021 [fontsize="8"]
+n022 [width="0.5" label="[P]" shape="box" style="dashed" height="0.35"]
+n023 [width="0.5" label="[Q]" shape="box" style="dashed" height="0.35"]
+{/*L=x1*/rank=same n004 n015}
+{/*L=p1*/rank=same n002 n013}
+{/*L=b*/rank=same n009 n010 n020 n021}
+{/*L=x2*/rank=same n008 n019}
+{/*L=p2*/rank=same n006 n017}
+{/*L=m*/rank=same n001 n011}
+}
diff --git a/graphs/directed/jcctree.gv b/graphs/directed/jcctree.gv
new file mode 100644
index 000000000..9c557dfde
--- /dev/null
+++ b/graphs/directed/jcctree.gv
@@ -0,0 +1,44 @@
+digraph "tree" {
+// The problem disappeared when I removed the "ELEM3 -> ID5;" line!
+//size="4,5";
+ordering=out;
+node [shape=plaintext];
+SPEC -> DEF2;
+SPEC -> DEF1;
+DEF1 -> ID1;
+DEF1 -> SET1;
+DEF1 -> SC1;
+DEF2 -> ID2;
+DEF2 -> SET2;
+DEF2 -> SC2;
+SET1 -> OPEN1;
+SET1 -> ELEM1;
+SET1 -> SC3;
+SET1 -> ELEM2;
+SET1 -> CLOSE1;
+ELEM1 -> ID3;
+SET2 -> OPEN2;
+SET2 -> ELEM3;
+SET2 -> CLOSE2;
+ELEM2 -> ID4;
+ELEM3 -> ID5;
+DEF1 [label=DEF];
+DEF2 [label=DEF];
+SET1 [label=SET];
+SC1 [label=";"];
+SC3 [label=";"];
+SET2 [label=SET];
+SC2 [label=";"];
+OPEN1 [label="{"];
+OPEN2 [label="{"];
+CLOSE1 [label="}"];
+CLOSE2 [label="}"];
+ELEM1 [label=ELEMENT];
+ELEM2 [label=ELEMENT];
+ELEM3 [label=ELEMENT];
+ID1 [label=cities];
+ID2 [label=insects];
+ID3 [label=andover];
+ID4 [label=boston];
+ID5 [label=fly];
+}
diff --git a/graphs/directed/jsort.gv b/graphs/directed/jsort.gv
new file mode 100644
index 000000000..ccfc7f76e
--- /dev/null
+++ b/graphs/directed/jsort.gv
@@ -0,0 +1,150 @@
+digraph prof {
+	size="6,4"; ratio = fill;
+	node [style=filled];
+	start -> main [color="0.002 0.999 0.999"];
+	start -> on_exit [color="0.649 0.701 0.701"];
+	main -> sort [color="0.348 0.839 0.839"];
+	main -> merge [color="0.515 0.762 0.762"];
+	main -> term [color="0.647 0.702 0.702"];
+	main -> signal [color="0.650 0.700 0.700"];
+	main -> sbrk [color="0.650 0.700 0.700"];
+	main -> unlink [color="0.650 0.700 0.700"];
+	main -> newfile [color="0.650 0.700 0.700"];
+	main -> fclose [color="0.650 0.700 0.700"];
+	main -> close [color="0.650 0.700 0.700"];
+	main -> brk [color="0.650 0.700 0.700"];
+	main -> setbuf [color="0.650 0.700 0.700"];
+	main -> copyproto [color="0.650 0.700 0.700"];
+	main -> initree [color="0.650 0.700 0.700"];
+	main -> safeoutfil [color="0.650 0.700 0.700"];
+	main -> getpid [color="0.650 0.700 0.700"];
+	main -> sprintf [color="0.650 0.700 0.700"];
+	main -> creat [color="0.650 0.700 0.700"];
+	main -> rem [color="0.650 0.700 0.700"];
+	main -> oldfile [color="0.650 0.700 0.700"];
+	sort -> msort [color="0.619 0.714 0.714"];
+	sort -> filbuf [color="0.650 0.700 0.700"];
+	sort -> newfile [color="0.650 0.700 0.700"];
+	sort -> fclose [color="0.650 0.700 0.700"];
+	sort -> setbuf [color="0.650 0.700 0.700"];
+	sort -> setfil [color="0.650 0.700 0.700"];
+	msort -> qsort [color="0.650 0.700 0.700"];
+	msort -> insert [color="0.650 0.700 0.700"];
+	msort -> wline [color="0.650 0.700 0.700"];
+	msort -> div [color="0.650 0.700 0.700"];
+	msort -> cmpsave [color="0.650 0.700 0.700"];
+	merge -> insert [color="0.650 0.700 0.700"];
+	merge -> rline [color="0.650 0.700 0.700"];
+	merge -> wline [color="0.650 0.700 0.700"];
+	merge -> unlink [color="0.650 0.700 0.700"];
+	merge -> fopen [color="0.650 0.700 0.700"];
+	merge -> fclose [color="0.650 0.700 0.700"];
+	merge -> setfil [color="0.650 0.700 0.700"];
+	merge -> mul [color="0.650 0.700 0.700"];
+	merge -> setbuf [color="0.650 0.700 0.700"];
+	merge -> cmpsave [color="0.650 0.700 0.700"];
+	insert -> cmpa [color="0.650 0.700 0.700"];
+	wline -> flsbuf [color="0.649 0.700 0.700"];
+	qsort -> cmpa [color="0.650 0.700 0.700"];
+	rline -> filbuf [color="0.649 0.700 0.700"];
+	xflsbuf -> write [color="0.650 0.700 0.700"];
+	flsbuf -> xflsbuf [color="0.649 0.700 0.700"];
+	filbuf -> read [color="0.650 0.700 0.700"];
+	term -> unlink [color="0.650 0.700 0.700"];
+	term -> signal [color="0.650 0.700 0.700"];
+	term -> setfil [color="0.650 0.700 0.700"];
+	term -> exit [color="0.650 0.700 0.700"];
+	endopen -> open [color="0.650 0.700 0.700"];
+	fopen -> endopen [color="0.639 0.705 0.705"];
+	fopen -> findiop [color="0.650 0.700 0.700"];
+	newfile -> fopen [color="0.634 0.707 0.707"];
+	newfile -> setfil [color="0.650 0.700 0.700"];
+	fclose -> fflush [color="0.642 0.704 0.704"];
+	fclose -> close [color="0.650 0.700 0.700"];
+	fflush -> xflsbuf [color="0.635 0.707 0.707"];
+	malloc -> morecore [color="0.325 0.850 0.850"];
+	malloc -> demote [color="0.650 0.700 0.700"];
+	morecore -> sbrk [color="0.650 0.700 0.700"];
+	morecore -> getfreehdr [color="0.650 0.700 0.700"];
+	morecore -> free [color="0.650 0.700 0.700"];
+	morecore -> getpagesize [color="0.650 0.700 0.700"];
+	morecore -> putfreehdr [color="0.650 0.700 0.700"];
+	morecore -> udiv [color="0.650 0.700 0.700"];
+	morecore -> umul [color="0.650 0.700 0.700"];
+	on_exit -> malloc [color="0.325 0.850 0.850"];
+	signal -> sigvec [color="0.650 0.700 0.700"];
+	moncontrol -> profil [color="0.650 0.700 0.700"];
+	getfreehdr -> sbrk [color="0.650 0.700 0.700"];
+	free -> insert [color="0.650 0.700 0.700"];
+	insert -> getfreehdr [color="0.650 0.700 0.700"];
+	setfil -> div [color="0.650 0.700 0.700"];
+	setfil -> rem [color="0.650 0.700 0.700"];
+	sigvec -> sigblock [color="0.650 0.700 0.700"];
+	sigvec -> sigsetmask [color="0.650 0.700 0.700"];
+	doprnt -> urem [color="0.650 0.700 0.700"];
+	doprnt -> udiv [color="0.650 0.700 0.700"];
+	doprnt -> strlen [color="0.650 0.700 0.700"];
+	doprnt -> localeconv [color="0.650 0.700 0.700"];
+	sprintf -> doprnt [color="0.650 0.700 0.700"];
+cmpa [color="0.000 1.000 1.000"];
+wline [color="0.201 0.753 1.000"];
+insert [color="0.305 0.625 1.000"];
+rline [color="0.355 0.563 1.000"];
+sort [color="0.408 0.498 1.000"];
+qsort [color="0.449 0.447 1.000"];
+write [color="0.499 0.386 1.000"];
+read [color="0.578 0.289 1.000"];
+msort [color="0.590 0.273 1.000"];
+merge [color="0.603 0.258 1.000"];
+unlink [color="0.628 0.227 1.000"];
+filbuf [color="0.641 0.212 1.000"];
+open [color="0.641 0.212 1.000"];
+sbrk [color="0.647 0.204 1.000"];
+signal [color="0.647 0.204 1.000"];
+moncontrol [color="0.647 0.204 1.000"];
+xflsbuf [color="0.650 0.200 1.000"];
+flsbuf [color="0.650 0.200 1.000"];
+div [color="0.650 0.200 1.000"];
+cmpsave [color="0.650 0.200 1.000"];
+rem [color="0.650 0.200 1.000"];
+setfil [color="0.650 0.200 1.000"];
+close [color="0.650 0.200 1.000"];
+fclose [color="0.650 0.200 1.000"];
+fflush [color="0.650 0.200 1.000"];
+setbuf [color="0.650 0.200 1.000"];
+endopen [color="0.650 0.200 1.000"];
+findiop [color="0.650 0.200 1.000"];
+fopen [color="0.650 0.200 1.000"];
+mul [color="0.650 0.200 1.000"];
+newfile [color="0.650 0.200 1.000"];
+sigblock [color="0.650 0.200 1.000"];
+sigsetmask [color="0.650 0.200 1.000"];
+sigvec [color="0.650 0.200 1.000"];
+udiv [color="0.650 0.200 1.000"];
+urem [color="0.650 0.200 1.000"];
+brk [color="0.650 0.200 1.000"];
+getfreehdr [color="0.650 0.200 1.000"];
+strlen [color="0.650 0.200 1.000"];
+umul [color="0.650 0.200 1.000"];
+doprnt [color="0.650 0.200 1.000"];
+copyproto [color="0.650 0.200 1.000"];
+creat [color="0.650 0.200 1.000"];
+demote [color="0.650 0.200 1.000"];
+exit [color="0.650 0.200 1.000"];
+free [color="0.650 0.200 1.000"];
+getpagesize [color="0.650 0.200 1.000"];
+getpid [color="0.650 0.200 1.000"];
+initree [color="0.650 0.200 1.000"];
+insert [color="0.650 0.200 1.000"];
+localeconv [color="0.650 0.200 1.000"];
+main [color="0.650 0.200 1.000"];
+malloc [color="0.650 0.200 1.000"];
+morecore [color="0.650 0.200 1.000"];
+oldfile [color="0.650 0.200 1.000"];
+on_exit [color="0.650 0.200 1.000"];
+profil [color="0.650 0.200 1.000"];
+putfreehdr [color="0.650 0.200 1.000"];
+safeoutfil [color="0.650 0.200 1.000"];
+sprintf [color="0.650 0.200 1.000"];
+term [color="0.650 0.200 1.000"];
+}
diff --git a/graphs/directed/ldbxtried.gv b/graphs/directed/ldbxtried.gv
new file mode 100644
index 000000000..5bacb1108
--- /dev/null
+++ b/graphs/directed/ldbxtried.gv
@@ -0,0 +1,416 @@
+digraph g {
+graph [
+fontsize = "14"
+fontname = "Times-Roman"
+fontcolor = "black"
+color = "black"
+];
+node [
+fontsize = "14"
+fontname = "Times-Roman"
+fontcolor = "black"
+shape = "box"
+color = "black"
+width = "0.5"
+style = "filled"
+];
+edge [
+fontsize = "14"
+fontname = "Times-Roman"
+fontcolor = "black"
+color = "black"
+];
+"n0" [
+label = "18519\n?"
+color = "lightblue"
+];
+"n1" [
+label = "4836"
+shape = "ellipse"
+color = "maroon1"
+];
+"n2" [
+label = "ttyqa"
+shape = "ellipse"
+color = "maroon1"
+];
+"n448" [
+label = "21079\nlefty"
+color = "lightblue"
+];
+"n449" [
+label = "tried.lefty"
+shape = "ellipse"
+color = "maroon1"
+];
+"n454" [
+fontsize = "7"
+label = "bunting\n6000"
+shape = "doublecircle"
+color = "green"
+];
+"n460" [
+label = ""
+shape = "doublecircle"
+color = "yellow"
+];
+"n461" [
+label = ""
+shape = "doublecircle"
+color = "yellow"
+];
+"n462" [
+label = "21084\ntried"
+color = "lightblue"
+];
+"n464" [
+label = "21086\nldbx"
+color = "lightblue"
+];
+"n466" [
+label = "ldbx"
+shape = "ellipse"
+color = "maroon1"
+];
+"n468" [
+label = "21087\nlefty"
+color = "lightblue"
+];
+"n469" [
+label = "sh21086.1"
+shape = "ellipse"
+color = "maroon1"
+];
+"n474" [
+fontsize = "7"
+label = "bunting\n6000"
+shape = "doublecircle"
+color = "green"
+];
+"n479" [
+label = "ldbx.lefty"
+shape = "ellipse"
+color = "maroon1"
+];
+"n482" [
+label = ""
+shape = "doublecircle"
+color = "yellow"
+];
+"n483" [
+label = ""
+shape = "doublecircle"
+color = "yellow"
+];
+"n484" [
+label = "21088\ndot"
+color = "lightblue"
+];
+"n486" [
+label = ""
+shape = "doublecircle"
+color = "yellow"
+];
+"n487" [
+label = ""
+shape = "doublecircle"
+color = "yellow"
+];
+"n488" [
+label = "21089\nxterm"
+color = "lightblue"
+];
+"n496" [
+fontsize = "7"
+label = "bunting\n6000"
+shape = "doublecircle"
+color = "green"
+];
+"n500" [
+label = "ptyq2"
+shape = "ellipse"
+color = "maroon1"
+];
+"n503" [
+label = "21090\nldbxmp"
+color = "lightblue"
+];
+"n505" [
+label = "ttyq2"
+shape = "ellipse"
+color = "maroon1"
+];
+"n512" [
+label = "ptyq5"
+shape = "ellipse"
+color = "maroon1"
+];
+"n513" [
+label = "ttyq5"
+shape = "ellipse"
+color = "maroon1"
+];
+"n514" [
+label = "21091\ndbx"
+color = "lightblue"
+];
+"n518" [
+label = "tty"
+shape = "ellipse"
+color = "maroon1"
+];
+"n526" [
+label = "delaunay.c"
+shape = "ellipse"
+color = "maroon1"
+];
+subgraph "cluster0" {
+graph [
+fontsize = "14"
+fontname = "Times-Roman"
+fontcolor = "black"
+label = "toucan"
+color = "black"
+];
+node [
+fontsize = "14"
+fontname = "Times-Roman"
+fontcolor = "black"
+shape = "box"
+color = "black"
+width = "0.5"
+style = "filled"
+];
+edge [
+fontsize = "14"
+fontname = "Times-Roman"
+fontcolor = "black"
+color = "black"
+];
+"n0"
+"n468"
+"n486"
+"n460"
+"n487"
+"n514"
+"n461"
+"n488"
+"n462"
+"n464"
+"n482"
+"n483"
+"n448"
+"n484"
+"n503"
+}
+"n0" -> "n1" [
+dir = "both"
+];
+"n0" -> "n2" [
+dir = "both"
+];
+"n0" -> "n2" [
+dir = "both"
+];
+"n0" -> "n2" [
+dir = "both"
+];
+"n0" -> "n448" [
+style = "dotted"
+];
+"n448" -> "n2" [
+dir = "both"
+];
+"n448" -> "n2" [
+dir = "both"
+];
+"n448" -> "n2" [
+dir = "both"
+];
+"n448" -> "n449" [
+dir = "back"
+];
+"n448" -> "n454" [
+dir = "both"
+];
+"n448" -> "n460" [
+dir = "back"
+];
+"n448" -> "n461" [
+dir = "forward"
+];
+"n448" -> "n462" [
+style = "dotted"
+];
+"n462" -> "n2" [
+dir = "both"
+];
+"n462" -> "n2" [
+dir = "both"
+];
+"n462" -> "n2" [
+dir = "both"
+];
+"n462" -> "n449" [
+dir = "back"
+];
+"n462" -> "n460" [
+dir = "forward"
+];
+"n462" -> "n461" [
+dir = "back"
+];
+"n462" -> "n460" [
+dir = "forward"
+];
+"n462" -> "n461" [
+dir = "back"
+];
+"n0" -> "n464" [
+style = "dotted"
+];
+"n464" -> "n2" [
+dir = "both"
+];
+"n464" -> "n2" [
+dir = "both"
+];
+"n464" -> "n2" [
+dir = "both"
+];
+"n464" -> "n466" [
+dir = "back"
+];
+"n464" -> "n468" [
+style = "dotted"
+];
+"n468" -> "n2" [
+dir = "both"
+];
+"n468" -> "n2" [
+dir = "both"
+];
+"n468" -> "n469" [
+dir = "back"
+];
+"n468" -> "n474" [
+dir = "both"
+];
+"n468" -> "n479" [
+dir = "back"
+];
+"n468" -> "n482" [
+dir = "back"
+];
+"n468" -> "n483" [
+dir = "forward"
+];
+"n468" -> "n484" [
+style = "dotted"
+];
+"n484" -> "n2" [
+dir = "both"
+];
+"n484" -> "n483" [
+dir = "back"
+];
+"n484" -> "n479" [
+dir = "back"
+];
+"n484" -> "n482" [
+dir = "forward"
+];
+"n468" -> "n486" [
+dir = "back"
+];
+"n468" -> "n487" [
+dir = "forward"
+];
+"n468" -> "n488" [
+style = "dotted"
+];
+"n488" -> "n486" [
+dir = "forward"
+];
+"n488" -> "n2" [
+dir = "both"
+];
+"n488" -> "n487" [
+dir = "back"
+];
+"n488" -> "n469" [
+dir = "back"
+];
+"n488" -> "n2" [
+dir = "both"
+];
+"n488" -> "n479" [
+dir = "back"
+];
+"n488" -> "n496" [
+dir = "both"
+];
+"n488" -> "n500" [
+dir = "both"
+];
+"n488" -> "n503" [
+style = "dotted"
+];
+"n503" -> "n479" [
+dir = "back"
+];
+"n503" -> "n486" [
+dir = "forward"
+];
+"n503" -> "n487" [
+dir = "back"
+];
+"n503" -> "n505" [
+dir = "both"
+];
+"n503" -> "n505" [
+dir = "both"
+];
+"n503" -> "n505" [
+dir = "forward"
+];
+"n503" -> "n512" [
+dir = "both"
+];
+"n503" -> "n514" [
+style = "dotted"
+];
+"n514" -> "n487" [
+dir = "back"
+];
+"n514" -> "n486" [
+dir = "forward"
+];
+"n514" -> "n479" [
+dir = "back"
+];
+"n514" -> "n505" [
+dir = "forward"
+];
+"n503" -> "n486" [
+dir = "forward"
+];
+"n514" -> "n518" [
+dir = "back"
+];
+"n514" -> "n513" [
+dir = "both"
+];
+"n514" -> "n513" [
+dir = "both"
+];
+"n514" -> "n518" [
+dir = "back"
+];
+"n514" -> "n526" [
+dir = "back"
+];
+"n503" -> "n487" [
+dir = "back"
+];
+}
diff --git a/graphs/directed/longflat.gv b/graphs/directed/longflat.gv
new file mode 100644
index 000000000..644d677d1
--- /dev/null
+++ b/graphs/directed/longflat.gv
@@ -0,0 +1,7 @@
+digraph if
+{
+rankdir=LR;
+  {rank=same;b;c;}
+  a->b;
+  c->b[label="long long long"];
+}
diff --git a/graphs/directed/mike.gv b/graphs/directed/mike.gv
new file mode 100644
index 000000000..bf049afff
--- /dev/null
+++ b/graphs/directed/mike.gv
@@ -0,0 +1,42 @@
+digraph mike{
+size = "8,8";
+	a -> A;
+	a -> m;
+	a -> E;
+	t -> O;
+	r -> V;
+	r -> Q;
+	p -> B;
+	m -> R;
+	l -> C;
+	c -> C;
+	W -> X;
+	W -> D;
+	V -> W;
+	T -> U;
+	Q -> T;
+	Q -> H;
+	Q -> A;
+	O -> K;
+	L -> U;
+	K -> L;
+	K -> J;
+	K -> E;
+	J -> I;
+	R -> B;
+	P -> F;
+	H -> R;
+	H -> P;
+	U -> H;
+	G -> U;
+	E -> G;
+	C -> Z;
+	C -> D;
+	S -> D;
+	B -> N;
+	B -> D;
+	B -> S;
+	M -> B;
+	A -> M;
+	N -> Y;
+}
diff --git a/graphs/directed/nhg.gv b/graphs/directed/nhg.gv
new file mode 100644
index 000000000..826e404b4
--- /dev/null
+++ b/graphs/directed/nhg.gv
@@ -0,0 +1,13 @@
+digraph automata_0 {
+	size ="8.5, 11";
+	node [shape = circle];
+	0 [ style = filled, color=lightgrey ];
+	2 [ shape = doublecircle ];
+	0 -> 2 [ label = "a " ];
+	0 -> 1 [ label = "other " ];
+	1 -> 2 [ label = "a " ];
+	1 -> 1 [ label = "other " ];
+	2 -> 2 [ label = "a " ];
+	2 -> 1 [ label = "other " ];
+	"Machine: a" [ shape = plaintext ];
+}
diff --git a/graphs/directed/oldarrows.gv b/graphs/directed/oldarrows.gv
new file mode 100644
index 000000000..49416d6e5
--- /dev/null
+++ b/graphs/directed/oldarrows.gv
@@ -0,0 +1,57 @@
+digraph G {
+  // leave some space for the head/taillabels
+  graph [ranksep=1.5 splines=true overlap=false]
+
+  // to avoid confusion, remember this:
+  // it's spelt tail/head, but it's read start/end
+
+  // emphasize theatrically
+  // show only explicitly given head/tails
+  // put head/tail labels farther from the node
+//  edge [arrowsize=2 dir=none labeldistance=3]
+  edge [dir=none labeldistance=3]
+
+  // not interested in node labels
+  node [shape=circle width=0.5 label=""]
+
+  {
+    edge [samehead=ahead samearrowhead=1]
+    a->Z [arrowtail=none taillabel=none]
+    b->Z [arrowtail=normal taillabel=normal]
+    c->Z [arrowtail=inv taillabel=inv]
+    d->Z [arrowtail=dot taillabel=dot]
+    e->Z [arrowtail=odot taillabel=odot]
+    f->Z [arrowtail=invdot taillabel=invdot]
+    g->Z [arrowtail=invodot taillabel=invodot]
+    h->Z [arrowtail=open taillabel=open]
+    i->Z [arrowtail=halfopen taillabel=halfopen arrowhead=inv headlabel=samehead]
+    j->Z [arrowtail=empty taillabel=empty]
+    k->Z [arrowtail=invempty taillabel=invempty]
+    l->Z [arrowtail=diamond taillabel=diamond]
+    m->Z [arrowtail=odiamond taillabel=odiamond]
+    n->Z [arrowtail=box taillabel=box]
+    o->Z [arrowtail=obox taillabel=obox]
+    p->Z [arrowtail=tee taillabel=tee]
+    q->Z [arrowtail=crow taillabel=crow]
+  }
+  {
+    edge [sametail=atail samearrowtail=1]
+    Z->A [arrowhead=none headlabel=none]
+    Z->B [arrowhead=normal headlabel=normal]
+    Z->C [arrowhead=inv headlabel=inv]
+    Z->D [arrowhead=dot headlabel=dot]
+    Z->E [arrowhead=odot headlabel=odot]
+    Z->F [arrowhead=invdot headlabel=invdot]
+    Z->G [arrowhead=invodot headlabel=invodot]
+    Z->H [arrowhead=open headlabel=open]
+    Z->I [arrowhead=halfopen headlabel=halfopen arrowtail=inv taillabel=sametail]
+    Z->J [arrowhead=empty headlabel=empty]
+    Z->K [arrowhead=invempty headlabel=invempty]
+    Z->L [arrowhead=diamond headlabel=diamond]
+    Z->M [arrowhead=odiamond headlabel=odiamond]
+    Z->N [arrowhead=box headlabel=box]
+    Z->O [arrowhead=obox headlabel=obox]
+    Z->P [arrowhead=tee headlabel=tee]
+    Z->Q [arrowhead=crow headlabel=crow]
+  }
+}
diff --git a/graphs/directed/pgram.gv b/graphs/directed/pgram.gv
new file mode 100644
index 000000000..367eef7a0
--- /dev/null
+++ b/graphs/directed/pgram.gv
@@ -0,0 +1,91 @@
+digraph test {
+
+    size="7,9.5";
+    page="8,10.5";
+    ratio=fill;
+    rankdir=LR;
+
+    { rank=same;
+      node [shape=house];
+      A;C;E;G;I;K;M;O;Q;S;U;W;Y;
+      node [shape=invhouse];
+      B;D;F;H;J;L;N;P;R;T;V;X;Z;
+    }
+
+    { rank=same;
+      node [shape=parallelogram];
+      "Parallelogram" [label="This is a test\nof a multiline\nlabel in an\nparallelogram with approx\nsquare aspect"];
+      "a ----- long thin parallelogram";
+      "xx" [label="m"];
+      "yy" [label="a\nb\nc\nd\ne\nf"];
+      node [shape=octagon];
+      "Octagon" [label="This is a test\nof a multiline\nlabel in an\noctagon with approx\nsquare aspect"];
+      node [shape=parallelogram];
+      "Parallelogram" [label="This is a test\nof a multiline\nlabel in an\nparallelogram with approx\nsquare aspect"];
+      "a ----- long thin parallelogram";
+      "zz" [label="m"];
+      "qq" [label="a\nb\nc\nd\ne\nf"];
+      ordering=out;
+    }
+
+    Parallelogram -> A;
+    Parallelogram -> B;
+    Parallelogram -> C;
+    Parallelogram -> D;
+    Parallelogram -> E;
+    Parallelogram -> F;
+    Parallelogram -> G;
+    Parallelogram -> H;
+    Parallelogram -> I;
+    Parallelogram -> J;
+    Parallelogram -> K;
+    Parallelogram -> L;
+    Parallelogram -> M;
+    Parallelogram -> N;
+    Parallelogram -> O;
+    Parallelogram -> P;
+    Parallelogram -> Q;
+    Parallelogram -> R;
+    Parallelogram -> S;
+    Parallelogram -> T;
+    Parallelogram -> U;
+    Parallelogram -> V;
+    Parallelogram -> W;
+    Parallelogram -> X;
+    Parallelogram -> Y;
+    Parallelogram -> Z;
+
+    { rank=same;
+      node [shape=triangle];
+      a;c;e;g;i;k;m;o;q;s;u;w;y;
+      node [shape=tripleoctagon];
+      b;d;f;h;j;l;n;p;r;t;v;x;z;
+    }
+
+    a -> Parallelogram -> Octagon;
+    b -> Parallelogram -> Octagon;
+    c -> Parallelogram -> Octagon;
+    d -> Parallelogram -> Octagon;
+    e -> Parallelogram -> Octagon;
+    f -> Parallelogram -> Octagon;
+    g -> Parallelogram -> Octagon;
+    h -> Parallelogram -> Octagon;
+    i -> Parallelogram -> Octagon;
+    j -> Parallelogram -> Octagon;
+    k -> Parallelogram -> Octagon;
+    l -> Parallelogram -> Octagon;
+    m -> Parallelogram -> Octagon;
+    n -> Parallelogram -> Octagon;
+    o -> Parallelogram -> Octagon;
+    p -> Parallelogram -> Octagon;
+    q -> Parallelogram -> Octagon;
+    r -> Parallelogram -> Octagon;
+    s -> Parallelogram -> Octagon;
+    t -> Parallelogram -> Octagon;
+    u -> Parallelogram -> Octagon;
+    v -> Parallelogram -> Octagon;
+    w -> Parallelogram -> Octagon;
+    x -> Parallelogram -> Octagon;
+    y -> Parallelogram -> Octagon;
+    z -> Parallelogram -> Octagon;
+}
diff --git a/graphs/directed/pm2way.gv b/graphs/directed/pm2way.gv
new file mode 100644
index 000000000..98ee2952e
--- /dev/null
+++ b/graphs/directed/pm2way.gv
@@ -0,0 +1,126 @@
+digraph g {
+graph [
+];
+node [
+fontsize = "14"
+fontname = "Times-Roman"
+fontcolor = "black"
+shape = "box"
+color = "black"
+width = "0.5"
+];
+edge [
+fontsize = "14"
+fontname = "Times-Roman"
+fontcolor = "black"
+color = "black"
+];
+"22690" [
+label = "22690\n?"
+pname = "?"
+kind = "proc"
+];
+"22692" [
+label = "22692\ndotty"
+pname = "dotty"
+kind = "proc"
+];
+"116842+2595" [
+label = "116842+2595\n/home/ek/work/sun4/bin/dotty"
+fname = "/home/ek/work/sun4/bin/dotty"
+shape = "ellipse"
+kind = "file"
+];
+"22693" [
+label = "22693\nlefty"
+pname = "lefty"
+kind = "proc"
+];
+"182440-1" [
+label = "182440-1\n182441-1\npipe"
+fontsize = "7"
+fname = "pipe"
+shape = "doublecircle"
+subkind = "pipe"
+kind = "file"
+];
+"182442-1" [
+label = "182442-1\n182443-1\npipe"
+fontsize = "7"
+fname = "pipe"
+shape = "doublecircle"
+subkind = "pipe"
+kind = "file"
+];
+"22694" [
+label = "22694\ndot"
+pname = "dot"
+kind = "proc"
+];
+"4761+2595" [
+label = "4761+2595\n/home/ek/pm2.dot"
+fname = "/home/ek/pm2.dot"
+shape = "ellipse"
+kind = "file"
+];
+"22690" -> "22692" [
+fontsize = "14"
+fontname = "Times-Roman"
+fontcolor = "black"
+color = "black"
+];
+"22692" -> "116842+2595" [
+fontsize = "14"
+fontname = "Times-Roman"
+fontcolor = "black"
+dir = "back"
+color = "black"
+];
+"22692" -> "22693" [
+fontsize = "14"
+fontname = "Times-Roman"
+fontcolor = "black"
+color = "black"
+];
+"22693" -> "182440-1" [
+fontsize = "14"
+fontname = "Times-Roman"
+fontcolor = "black"
+dir = "back"
+color = "black"
+];
+"22693" -> "182442-1" [
+fontsize = "14"
+fontname = "Times-Roman"
+fontcolor = "black"
+dir = "forward"
+color = "black"
+];
+"22693" -> "22694" [
+fontsize = "14"
+fontname = "Times-Roman"
+fontcolor = "black"
+color = "black"
+];
+"22694" -> "182440-1" [
+fontsize = "14"
+fontname = "Times-Roman"
+fontcolor = "black"
+dir = "forward"
+color = "black"
+];
+"22694" -> "182442-1" [
+fontsize = "14"
+fontname = "Times-Roman"
+fontcolor = "black"
+dir = "back"
+color = "black"
+];
+"22693" -> "4761+2595" [
+fontsize = "14"
+fontname = "Times-Roman"
+fontcolor = "black"
+dir = "back"
+color = "black"
+];
+}
diff --git a/graphs/directed/pmpipe.gv b/graphs/directed/pmpipe.gv
new file mode 100644
index 000000000..6eea33e4d
--- /dev/null
+++ b/graphs/directed/pmpipe.gv
@@ -0,0 +1,219 @@
+digraph g {
+graph [
+];
+node [
+fontsize = "14"
+fontname = "Times-Roman"
+fontcolor = "black"
+shape = "box"
+color = "black"
+width = "0.5"
+];
+edge [
+fontsize = "14"
+fontname = "Times-Roman"
+fontcolor = "black"
+color = "black"
+];
+"23296" [
+label = "23296\n?"
+pname = "?"
+kind = "proc"
+];
+"182948-1" [
+label = "182948-1\n182949-1\npipe"
+fontsize = "7"
+fname = "pipe"
+shape = "doublecircle"
+subkind = "pipe"
+kind = "file"
+];
+"23310" [
+label = "23310\ncat"
+pname = "cat"
+kind = "proc"
+];
+"182950-1" [
+label = "182950-1\n182951-1\npipe"
+fontsize = "7"
+fname = "pipe"
+shape = "doublecircle"
+subkind = "pipe"
+kind = "file"
+];
+"23311" [
+label = "23311\ncat"
+pname = "cat"
+kind = "proc"
+];
+"182952-1" [
+label = "182952-1\n182953-1\npipe"
+fontsize = "7"
+fname = "pipe"
+shape = "doublecircle"
+subkind = "pipe"
+kind = "file"
+];
+"23312" [
+label = "23312\ncat"
+pname = "cat"
+kind = "proc"
+];
+"182954-1" [
+label = "182954-1\n182955-1\npipe"
+fontsize = "7"
+fname = "pipe"
+shape = "doublecircle"
+subkind = "pipe"
+kind = "file"
+];
+"23313" [
+label = "23313\ncat"
+pname = "cat"
+kind = "proc"
+];
+"79893+2568" [
+label = "79893+2568\n/usr/share/lib/termcap"
+fname = "/usr/share/lib/termcap"
+shape = "ellipse"
+kind = "file"
+];
+"85+2560" [
+label = "85+2560\n?"
+fname = "?"
+shape = "ellipse"
+kind = "file"
+];
+"23314" [
+label = "23314\ncat"
+pname = "cat"
+kind = "proc"
+];
+"4151865284+0" [
+label = "4151865284+0\n/tmp/termcap"
+fname = "/tmp/termcap"
+shape = "ellipse"
+kind = "file"
+];
+"23296" -> "23310" [
+fontsize = "14"
+fontname = "Times-Roman"
+fontcolor = "black"
+color = "black"
+];
+"23296" -> "23311" [
+fontsize = "14"
+fontname = "Times-Roman"
+fontcolor = "black"
+color = "black"
+];
+"23311" -> "182948-1" [
+fontsize = "14"
+fontname = "Times-Roman"
+fontcolor = "black"
+dir = "back"
+color = "black"
+];
+"23310" -> "182948-1" [
+fontsize = "14"
+fontname = "Times-Roman"
+fontcolor = "black"
+dir = "forward"
+color = "black"
+];
+"23296" -> "23312" [
+fontsize = "14"
+fontname = "Times-Roman"
+fontcolor = "black"
+color = "black"
+];
+"23312" -> "182952-1" [
+fontsize = "14"
+fontname = "Times-Roman"
+fontcolor = "black"
+dir = "forward"
+color = "black"
+];
+"23312" -> "182950-1" [
+fontsize = "14"
+fontname = "Times-Roman"
+fontcolor = "black"
+dir = "back"
+color = "black"
+];
+"23296" -> "23313" [
+fontsize = "14"
+fontname = "Times-Roman"
+fontcolor = "black"
+color = "black"
+];
+"23313" -> "182954-1" [
+fontsize = "14"
+fontname = "Times-Roman"
+fontcolor = "black"
+dir = "forward"
+color = "black"
+];
+"23311" -> "182950-1" [
+fontsize = "14"
+fontname = "Times-Roman"
+fontcolor = "black"
+dir = "forward"
+color = "black"
+];
+"23310" -> "79893+2568" [
+fontsize = "14"
+fontname = "Times-Roman"
+fontcolor = "black"
+dir = "back"
+color = "black"
+];
+"23296" -> "85+2560" [
+fontsize = "14"
+fontname = "Times-Roman"
+fontcolor = "black"
+dir = "both"
+color = "black"
+];
+"23296" -> "23314" [
+fontsize = "14"
+fontname = "Times-Roman"
+fontcolor = "black"
+color = "black"
+];
+"23314" -> "85+2560" [
+fontsize = "14"
+fontname = "Times-Roman"
+fontcolor = "black"
+dir = "both"
+color = "black"
+];
+"23314" -> "182954-1" [
+fontsize = "14"
+fontname = "Times-Roman"
+fontcolor = "black"
+dir = "back"
+color = "black"
+];
+"23296" -> "85+2560" [
+fontsize = "14"
+fontname = "Times-Roman"
+fontcolor = "black"
+dir = "both"
+color = "black"
+];
+"23314" -> "4151865284+0" [
+fontsize = "14"
+fontname = "Times-Roman"
+fontcolor = "black"
+dir = "forward"
+color = "black"
+];
+"23313" -> "182952-1" [
+fontsize = "14"
+fontname = "Times-Roman"
+fontcolor = "black"
+dir = "back"
+color = "black"
+];
+}
diff --git a/graphs/directed/polypoly.gv b/graphs/directed/polypoly.gv
new file mode 100644
index 000000000..9c84114ff
--- /dev/null
+++ b/graphs/directed/polypoly.gv
@@ -0,0 +1,162 @@
+digraph polypoly {
+	
+    size="7,9.5";
+    page="8.5,11";
+    ratio=fill;
+    node [shape=polygon];
+
+    { rank=same;
+      node [sides=0];
+      node [peripheries=1];
+      0000 [label="M"];
+      0001 [label="MMMMMMMMMM"];
+      0002 [label="M\nM\nM\nM\nM\nM"];
+      0003 [label="MMMMMMMMMM\nMMMMMMMMMM\nMMMMMMMMMM\nMMMMMMMMMM\nMMMMMMMMMM\nMMMMMMMMMM"];
+      node [peripheries=2];
+      0010 [label="M"];
+      0011 [label="MMMMMMMMMM"];
+      0012 [label="M\nM\nM\nM\nM\nM"];
+      0013 [label="MMMMMMMMMM\nMMMMMMMMMM\nMMMMMMMMMM\nMMMMMMMMMM\nMMMMMMMMMM\nMMMMMMMMMM"];
+      node [distortion=-.3];
+      0110 [label="M"];
+      0111 [label="MMMMMMMMMM"];
+      0112 [label="M\nM\nM\nM\nM\nM"];
+      0113 [label="MMMMMMMMMM\nMMMMMMMMMM\nMMMMMMMMMM\nMMMMMMMMMM\nMMMMMMMMMM\nMMMMMMMMMM"];
+    }
+    { rank=same;
+      node [sides=3];
+      node [peripheries=1];
+      node [orientation=0];
+      3000 [label="M"];
+      3001 [label="MMMMMMMMMM"];
+      3002 [label="M\nM\nM\nM\nM\nM"];
+      3003 [label="MMMMMMMMMM\nMMMMMMMMMM\nMMMMMMMMMM\nMMMMMMMMMM\nMMMMMMMMMM\nMMMMMMMMMM"];
+      node [peripheries=2];
+      node [orientation=60];
+      3110 [label="M"];
+      3111 [label="MMMMMMMMMM"];
+      3112 [label="M\nM\nM\nM\nM\nM"];
+      3113 [label="MMMMMMMMMM\nMMMMMMMMMM\nMMMMMMMMMM\nMMMMMMMMMM\nMMMMMMMMMM\nMMMMMMMMMM"];
+    }
+    3000->0000;
+    { rank=same;
+      node [sides=4];
+      node [peripheries=1];
+      node [orientation=0];
+      4000 [label="M"];
+      4001 [label="MMMMMMMMMM"];
+      4002 [label="M\nM\nM\nM\nM\nM"];
+      4003 [label="MMMMMMMMMM\nMMMMMMMMMM\nMMMMMMMMMM\nMMMMMMMMMM\nMMMMMMMMMM\nMMMMMMMMMM"];
+      node [peripheries=2];
+      node [orientation=45];
+      4110 [label="M"];
+      4111 [label="MMMMMMMMMM"];
+      4112 [label="M\nM\nM\nM\nM\nM"];
+      4113 [label="MMMMMMMMMM\nMMMMMMMMMM\nMMMMMMMMMM\nMMMMMMMMMM\nMMMMMMMMMM\nMMMMMMMMMM"];
+    }
+    4000->3000;
+    { rank=same;
+      node [sides=5];
+      node [peripheries=1];
+      node [orientation=0];
+      5000 [label="M"];
+      5001 [label="MMMMMMMMMM"];
+      5002 [label="M\nM\nM\nM\nM\nM"];
+      5003 [label="MMMMMMMMMM\nMMMMMMMMMM\nMMMMMMMMMM\nMMMMMMMMMM\nMMMMMMMMMM\nMMMMMMMMMM"];
+      node [peripheries=2];
+      node [orientation=36];
+      5110 [label="M"];
+      5111 [label="MMMMMMMMMM"];
+      5112 [label="M\nM\nM\nM\nM\nM"];
+      5113 [label="MMMMMMMMMM\nMMMMMMMMMM\nMMMMMMMMMM\nMMMMMMMMMM\nMMMMMMMMMM\nMMMMMMMMMM"];
+    }
+    5000->4000;
+    { rank=same;
+      node [sides=6];
+      node [peripheries=1];
+      node [orientation=0];
+      6000 [label="M"];
+      6001 [label="MMMMMMMMMM"];
+      6002 [label="M\nM\nM\nM\nM\nM"];
+      6003 [label="MMMMMMMMMM\nMMMMMMMMMM\nMMMMMMMMMM\nMMMMMMMMMM\nMMMMMMMMMM\nMMMMMMMMMM"];
+      node [peripheries=2];
+      node [orientation=30];
+      6110 [label="M"];
+      6111 [label="MMMMMMMMMM"];
+      6112 [label="M\nM\nM\nM\nM\nM"];
+      6113 [label="MMMMMMMMMM\nMMMMMMMMMM\nMMMMMMMMMM\nMMMMMMMMMM\nMMMMMMMMMM\nMMMMMMMMMM"];
+    }
+    6000->5000;
+    { rank=same;
+      node [sides=7];
+      node [peripheries=1];
+      node [orientation=0];
+      7000 [label="M"];
+      7001 [label="MMMMMMMMMM"];
+      7002 [label="M\nM\nM\nM\nM\nM"];
+      7003 [label="MMMMMMMMMM\nMMMMMMMMMM\nMMMMMMMMMM\nMMMMMMMMMM\nMMMMMMMMMM\nMMMMMMMMMM"];
+      node [peripheries=2];
+      node [orientation=25.7];
+      7110 [label="M"];
+      7111 [label="MMMMMMMMMM"];
+      7112 [label="M\nM\nM\nM\nM\nM"];
+      7113 [label="MMMMMMMMMM\nMMMMMMMMMM\nMMMMMMMMMM\nMMMMMMMMMM\nMMMMMMMMMM\nMMMMMMMMMM"];
+    }
+    7000->6000;
+    { rank=same;
+      node [sides=8];
+      node [peripheries=1];
+      node [orientation=0];
+      8000 [label="M"];
+      8001 [label="MMMMMMMMMM"];
+      8002 [label="M\nM\nM\nM\nM\nM"];
+      8003 [label="MMMMMMMMMM\nMMMMMMMMMM\nMMMMMMMMMM\nMMMMMMMMMM\nMMMMMMMMMM\nMMMMMMMMMM"];
+      node [peripheries=2];
+      node [orientation=22.5];
+      8110 [label="M"];
+      8111 [label="MMMMMMMMMM"];
+      8112 [label="M\nM\nM\nM\nM\nM"];
+      8113 [label="MMMMMMMMMM\nMMMMMMMMMM\nMMMMMMMMMM\nMMMMMMMMMM\nMMMMMMMMMM\nMMMMMMMMMM"];
+    }
+    8000->7000;
+    { rank=same;
+      node [sides=4];
+      node [peripheries=1];
+      node [regular=1];
+      node [distortion=.5];
+      node [orientation=0];
+      9000 [label="M"];
+      node [orientation=45.];
+      9001 [label="M"];
+      node [orientation=90.];
+      9002 [label="M"];
+      node [orientation=135.];
+      9003 [label="M"];
+      node [orientation=180.];
+      9004 [label="M"];
+      node [orientation=225.];
+      9005 [label="M"];
+      node [orientation=270.];
+      9006 [label="M"];
+      node [orientation=315.];
+      9007 [label="M"];
+      node [peripheries=2];
+      node [orientation=0];
+      9010 [label="M"];
+      node [orientation=45.];
+      9011 [label="M"];
+      node [orientation=90.];
+      9012 [label="M"];
+      node [orientation=135.];
+      9013 [label="M"];
+      node [orientation=180.];
+      9014 [label="M"];
+      node [orientation=225.];
+      9015 [label="M"];
+      node [orientation=270.];
+      9016 [label="M"];
+      node [orientation=315.];
+      9017 [label="M"];
+    }
+    9000->8000;
+}
diff --git a/graphs/directed/proc3d.gv b/graphs/directed/proc3d.gv
new file mode 100644
index 000000000..5c7714894
--- /dev/null
+++ b/graphs/directed/proc3d.gv
@@ -0,0 +1,443 @@
+digraph g {
+graph [
+fontname=Courier,
+fontsize=24,
+ranksep = 1.0,
+size="10,7.5",
+orientation=land,
+style="setlinewidth(8)"
+page = "8.5,11",
+center=true
+];
+node [
+shape = "box"
+width = "0.5"
+];
+edge [
+];
+subgraph cluster_0 {
+label="gryphon"
+"22342"
+"22343"
+"22346"
+"22347"
+"22351"
+"22344"
+"22345"
+"22348"
+"22350"
+"22357"
+}
+subgraph cluster_1 {
+label=toucan
+"22349"
+"22352"
+"22356"
+"22361"
+"22369"
+"22353"
+"22355"
+"22360"
+"22365"
+"22374"
+}
+subgraph cluster_2 {
+label=parker
+"22354"
+"22359"
+"22375"
+}
+subgraph cluster_3 {
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+"22362"
+"22367"
+"22373"
+"22378"
+}
+subgraph cluster_4 {
+label=kite
+"22363"
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+}
+subgraph cluster_5 {
+label=coot
+"22368"
+"22372"
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+}
+"22316" [
+label = "22316\nksh"
+pname = "ksh"
+kind = "proc"
+];
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+label = "22324\nnmake"
+pname = "nmake"
+kind = "proc"
+];
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+];
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+kind = "proc"
+];
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+kind = "proc"
+];
+"93736-32246" [
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+shape = "ellipse"
+kind = "file"
+];
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+fname = "/home/ek/work/src/lefty/gfxview.c"
+shape = "ellipse"
+kind = "file"
+];
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+pname = "ksh"
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+];
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+];
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+];
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+];
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+];
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+shape = "ellipse"
+kind = "file"
+];
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+];
+"93638-32246" [
+label = "93638-32246\n/home/ek/work/src/lefty/internal.c"
+fname = "/home/ek/work/src/lefty/internal.c"
+shape = "ellipse"
+kind = "file"
+];
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+pname = "as"
+kind = "proc"
+];
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+pname = "cc1"
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+];
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+shape = "ellipse"
+kind = "file"
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+pname = "cc1"
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+];
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+shape = "ellipse"
+kind = "file"
+];
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+pname = "as"
+kind = "proc"
+];
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+fname = "/home/ek/dev/src/lefty/exec.h"
+shape = "ellipse"
+kind = "file"
+];
+"135504-32246" [
+label = "135504-32246\n/home/ek/work/sun4/lefty/display.o"
+fname = "/home/ek/work/sun4/lefty/display.o"
+shape = "ellipse"
+kind = "file"
+];
+"22316" -> "22324" [
+];
+"22324" -> "22337" [
+];
+"22337" -> "22342" [
+];
+"22342" -> "22343" [
+];
+"22337" -> "22344" [
+];
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+];
+"22343" -> "22346" [
+];
+"22343" -> "22347" [
+];
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+];
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+];
+"22337" -> "22349" [
+];
+"22345" -> "22350" [
+];
+"22348" -> "93627-32246" [
+];
+"22343" -> "22351" [
+];
+"22349" -> "22352" [
+];
+"22337" -> "22353" [
+];
+"22337" -> "22354" [
+];
+"22353" -> "22355" [
+];
+"22352" -> "22356" [
+];
+"22345" -> "22357" [
+];
+"22337" -> "22358" [
+];
+"22354" -> "22359" [
+];
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+];
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+];
+"22356" -> "93645-32246" [
+];
+"22358" -> "22362" [
+];
+"22337" -> "22363" [
+];
+"22355" -> "22365" [
+];
+"22363" -> "22366" [
+];
+"22360" -> "93638-32246" [
+];
+"22362" -> "22367" [
+];
+"22337" -> "22368" [
+];
+"22352" -> "22369" [
+];
+"22324" -> "93642-32246" [
+];
+"22366" -> "22371" [
+];
+"22368" -> "22372" [
+];
+"22362" -> "22373" [
+];
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+];
+"22355" -> "22374" [
+];
+"22359" -> "22375" [
+];
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+];
+"22371" -> "93626-32246" [
+];
+"22372" -> "22377" [
+];
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+];
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+];
+"22372" -> "22381" [
+];
+"22371" -> "37592-32246" [
+];
+"22375" -> "135504-32246" [
+];
+
+/* hack to increase node separation */
+{	rank = same; "22337" -> "93642-32246" [style=invis,minlen=10]; }
+
+}
diff --git a/graphs/directed/record2.gv b/graphs/directed/record2.gv
new file mode 100644
index 000000000..7e393c0a1
--- /dev/null
+++ b/graphs/directed/record2.gv
@@ -0,0 +1,6 @@
+digraph G {
+    node [shape=record];
+    a [label = "<f0> foo | x | <f1> bar"];
+    b [label = "a | { <f0> foo | x | <f1> bar } | b"];
+    a:f0 -> b:f1 
+}