--- /dev/null
+shape none
+ graph G {a [label="" shape=none]}
+ dot -Tdot
+ dot -Txdot
+ dot -Tpng
+ dot -Tsvg
+ dot -Tps
+ dot -Tcmapx
+shape plaintext
+ graph G {a [label="" shape=plaintext]}
+ dot -Txdot
+shape point
+ graph G {a [label="" shape=point]}
+ dot -Txdot
+shape box
+ graph G {a [label="" shape=box]}
+ dot -Txdot
+shape rect
+ graph G {a [label="" shape=rect]}
+ dot -Txdot
+shape rectangle
+ graph G {a [label="" shape=rectangle]}
+ dot -Txdot
+shape ellipse
+ graph G {a [label="" shape=ellipse]}
+ dot -Txdot
+shape circle
+ graph G {a [label="" shape=circle]}
+ dot -Txdot
+shape triangle
+ graph G {a [label="" shape=triangle]}
+ dot -Txdot
+shape invtriangle
+ graph G {a [label="" shape=invtriangle]}
+ dot -Txdot
+shape diamond
+ graph G {a [label="" shape=diamond]}
+ dot -Txdot
+shape trapezium
+ graph G {a [label="" shape=trapezium]}
+ dot -Txdot
+shape invtrapezium
+ graph G {a [label="" shape=invtrapezium]}
+ dot -Txdot
+shape parallelogram
+ graph G {a [label="" shape=parallelogram]}
+ dot -Txdot
+shape house
+ graph G {a [label="" shape=house]}
+ dot -Txdot
+shape invhouse
+ graph G {a [label="" shape=invhouse]}
+ dot -Txdot
+shape pentagon
+ graph G {a [label="" shape=pentagon]}
+ dot -Txdot
+shape hexagon
+ graph G {a [label="" shape=hexagon]}
+ dot -Txdot
+shape septagon
+ graph G {a [label="" shape=septagon]}
+ dot -Txdot
+shape octagon
+ graph G {a [label="" shape=octagon]}
+ dot -Txdot
+shape doubleoctagon
+ graph G {a [label="" shape=doubleoctagon]}
+ dot -Txdot
+shape doublecircle
+ graph G {a [label="" shape=doublecircle]}
+ dot -Txdot
+shape tripleoctagon
+ graph G {a [label="" shape=tripleoctagon]}
+ dot -Txdot
+shape Mdiamond
+ graph G {a [label="" shape=Mdiamond]}
+ dot -Txdot
+shape Msquare
+ graph G {a [label="" shape=Msquare]}
+ dot -Txdot
+shape Mcircle
+ graph G {a [label="" shape=Mcircle]}
+ dot -Txdot
+label ""
+ graph G {a [label="" shape=none]}
+ dot -Txdot
+label b
+ graph G {a [label=b shape=none]}
+ dot -Txdot
+label a (default)
+ graph G {a [shape=none]}
+ dot -Txdot
+label a (\N)
+ graph G {a [label="\N" shape=none]}
+ dot -Txdot
+label n_of_G (\G)
+ graph G {a [label="n_of_\G" shape=none]}
+ dot -Txdot
+label \E\H\T (\E\H\T)
+ graph G {a [label="\E\H\T" shape=none]}
+ dot -Txdot
+label a->b (\E)
+ digraph G {node [label="" shape=none]; a->b [label="\E"]}
+ dot -Txdot
+label a (\T)
+ digraph G {node [label="" shape=none]; a->b [label="\T"]}
+ dot -Txdot
+label b (\H)
+ digraph G {node [label="" shape=none]; a->b [label="\H"]}
+ dot -Txdot
+label e_of_G (e_of_\G)
+ digraph G {node [label="" shape=none]; a->b [label="e_of_\G"]}
+ dot -Txdot
+label \N (\N)
+ digraph G {node [label="" shape=none]; a->b [label="\N"]}
+ dot -Txdot
+label center aligned
+ graph G {a [label="center\naligned\ntext" shape=none]}
+ dot -Txdot
+label left aligned
+ graph G {a [label="left\laligned\ltext" shape=none]}
+ dot -Txdot
+label right aligned
+ graph G {a [label="right\raligned\rtext" shape=none]}
+ dot -Txdot
+arrow none
+ digraph G {node [label="" shape=none]; a->b [arrowhead=none]}
+ dot -Txdot
+arrow default
+ digraph G {node [label="" shape=none]; a->b [arrowhead=""]}
+ dot -Txdot
+arrow normal
+ digraph G {node [label="" shape=none]; a->b [arrowhead=normal]}
+ dot -Txdot
+arrow box
+ digraph G {node [label="" shape=none]; a->b [arrowhead=box]}
+ dot -Txdot
+arrow crow
+ digraph G {node [label="" shape=none]; a->b [arrowhead=crow]}
+ dot -Txdot
+arrow diamond
+ digraph G {node [label="" shape=none]; a->b [arrowhead=diamond]}
+ dot -Txdot
+arrow dot
+ digraph G {node [label="" shape=none]; a->b [arrowhead=dot]}
+ dot -Txdot
+arrow inv
+ digraph G {node [label="" shape=none]; a->b [arrowhead=inv]}
+ dot -Txdot
+arrow tee
+ digraph G {node [label="" shape=none]; a->b [arrowhead=tee]}
+ dot -Txdot
+arrow vee
+ digraph G {node [label="" shape=none]; a->b [arrowhead=vee]}
+ dot -Txdot
+arrow lnormal
+ digraph G {node [label="" shape=none]; a->b [arrowhead=lnormal]}
+ dot -Txdot
+arrow lbox
+ digraph G {node [label="" shape=none]; a->b [arrowhead=lbox]}
+ dot -Txdot
+arrow lcrow
+ digraph G {node [label="" shape=none]; a->b [arrowhead=lcrow]}
+ dot -Txdot
+arrow ldiamond
+ digraph G {node [label="" shape=none]; a->b [arrowhead=ldiamond]}
+ dot -Txdot
+arrow ldot
+ digraph G {node [label="" shape=none]; a->b [arrowhead=ldot]}
+ dot -Txdot
+arrow linv
+ digraph G {node [label="" shape=none]; a->b [arrowhead=linv]}
+ dot -Txdot
+arrow ltee
+ digraph G {node [label="" shape=none]; a->b [arrowhead=ltee]}
+ dot -Txdot
+arrow lvee
+ digraph G {node [label="" shape=none]; a->b [arrowhead=lvee]}
+ dot -Txdot
+arrow rnormal
+ digraph G {node [label="" shape=none]; a->b [arrowhead=rnormal]}
+ dot -Txdot
+arrow rbox
+ digraph G {node [label="" shape=none]; a->b [arrowhead=rbox]}
+ dot -Txdot
+arrow rcrow
+ digraph G {node [label="" shape=none]; a->b [arrowhead=rcrow]}
+ dot -Txdot
+arrow rdiamond
+ digraph G {node [label="" shape=none]; a->b [arrowhead=rdiamond]}
+ dot -Txdot
+arrow rdot
+ digraph G {node [label="" shape=none]; a->b [arrowhead=rdot]}
+ dot -Txdot
+arrow rinv
+ digraph G {node [label="" shape=none]; a->b [arrowhead=rinv]}
+ dot -Txdot
+arrow rtee
+ digraph G {node [label="" shape=none]; a->b [arrowhead=rtee]}
+ dot -Txdot
+arrow rvee
+ digraph G {node [label="" shape=none]; a->b [arrowhead=rvee]}
+ dot -Txdot
+arrow onormal
+ digraph G {node [label="" shape=none]; a->b [arrowhead=onormal]}
+ dot -Txdot
+arrow obox
+ digraph G {node [label="" shape=none]; a->b [arrowhead=obox]}
+ dot -Txdot
+arrow ocrow
+ digraph G {node [label="" shape=none]; a->b [arrowhead=ocrow]}
+ dot -Txdot
+arrow odiamond
+ digraph G {node [label="" shape=none]; a->b [arrowhead=odiamond]}
+ dot -Txdot
+arrow odot
+ digraph G {node [label="" shape=none]; a->b [arrowhead=odot]}
+ dot -Txdot
+arrow oinv
+ digraph G {node [label="" shape=none]; a->b [arrowhead=oinv]}
+ dot -Txdot
+arrow otee
+ digraph G {node [label="" shape=none]; a->b [arrowhead=otee]}
+ dot -Txdot
+arrow ovee
+ digraph G {node [label="" shape=none]; a->b [arrowhead=ovee]}
+ dot -Txdot
+arrow onormalnormal
+ digraph G {node [label="" shape=none]; a->b [arrowhead=onormalnormal]}
+ dot -Txdot
+arrow oboxbox
+ digraph G {node [label="" shape=none]; a->b [arrowhead=oboxbox]}
+ dot -Txdot
+arrow ocrowcrow
+ digraph G {node [label="" shape=none]; a->b [arrowhead=ocrowcrow]}
+ dot -Txdot
+arrow odiamonddiamond
+ digraph G {node [label="" shape=none]; a->b [arrowhead=odiamonddiamond]}
+ dot -Txdot
+arrow odotdot
+ digraph G {node [label="" shape=none]; a->b [arrowhead=odotdot]}
+ dot -Txdot
+arrow oinvinv
+ digraph G {node [label="" shape=none]; a->b [arrowhead=oinvinv]}
+ dot -Txdot
+arrow oteetee
+ digraph G {node [label="" shape=none]; a->b [arrowhead=oteetee]}
+ dot -Txdot
+arrow oveevee
+ digraph G {node [label="" shape=none]; a->b [arrowhead=oveevee]}
+ dot -Txdot
+color black
+ graph G {a [label="" shape=box style=filled color=black]}
+ dot -Txdot
+ dot -Tpng
+color red
+ graph G {a [label="" shape=box style=filled color=red]}
+ dot -Txdot
+ dot -Tpng
+color hotpink
+ graph G {a [label="" shape=box style=filled color=hotpink]}
+ dot -Txdot
+ dot -Tpng
+color transparent
+ graph G {a [label="" shape=box style=filled color=transparent]}
+ dot -Txdot
+ dot -Tpng
+anchor empty
+ graph G {a [URL="" label="" shape=none]}
+ dot -Tcmapx
+ dot -Tps
+ dot -Tsvg
+anchor \G.html
+ graph G {graph [URL="\G.html"]}
+ dot -Tcmapx
+ dot -Tps
+ dot -Tsvg
+anchor \N.html
+ graph G {a [URL="\N.html" label="" shape=none]}
+ dot -Tcmapx
+ dot -Tps
+ dot -Tsvg
+anchor \E.html
+ digraph G {node [label="" shape=none]; a->b [URL="\E.html"]}
+ dot -Tcmapx
+ dot -Tps
+ dot -Tsvg