diff --git a/src/graphxq/samples/hier.dot b/src/graphxq/samples/hier.gv
similarity index 100%
rename from src/graphxq/samples/hier.dot
rename to src/graphxq/samples/hier.gv
diff --git a/src/graphxq/samples/process.dot b/src/graphxq/samples/process.gv
similarity index 100%
rename from src/graphxq/samples/process.dot
rename to src/graphxq/samples/process.gv
diff --git a/src/graphxq/samples/root.gv b/src/graphxq/samples/root.gv
new file mode 100644
index 0000000..fff85a1
--- /dev/null
+++ b/src/graphxq/samples/root.gv
@@ -0,0 +1,2143 @@
+/* this graph is from the graphviz rtest/graph directory. Laid out and rendered as
+  sfdp -Gsize=67! -Goverlap=prism -Tpng root.gv > root.png
+*/
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+	293 -> "402E" [label=" ", color=blue, arrowhead=dot];
+	293 -> "404E" [label=" ", color=blue, arrowhead=dot];
+	293 -> "406E" [label=" ", color=blue, arrowhead=dot];
+	293 -> "408E" [label=" ", color=blue, arrowhead=dot];
+	293 -> "412E" [label=" ", color=blue, arrowhead=dot];
+	293 -> "438E" [label=" ", color=blue, arrowhead=dot];
+	293 -> "448E" [label=" ", color=blue, arrowhead=dot];
+	293 -> "476E" [label=" ", color=blue, arrowhead=dot];
+	293 -> "504E" [label=" ", color=blue, arrowhead=dot];
+	293 -> "552E" [label=" ", color=blue, arrowhead=dot];
+	293 -> "634E" [label=" ", color=blue, arrowhead=dot];
+	293 -> "768E" [label=" ", color=blue, arrowhead=dot];
+	295 -> "44E" [label=" ", color=blue, arrowhead=dot];
+	295 -> "92E" [label=" ", color=blue, arrowhead=dot];
+	295 -> "250E" [label=" ", color=blue, arrowhead=dot];
+	295 -> "316E" [label=" ", color=blue, arrowhead=dot];
+	295 -> "380E" [label=" ", color=blue, arrowhead=dot];
+	295 -> "424E" [label=" ", color=blue, arrowhead=dot];
+	295 -> "442E" [label=" ", color=blue, arrowhead=dot];
+	295 -> "446E" [label=" ", color=blue, arrowhead=dot];
+	295 -> "454E" [label=" ", color=blue, arrowhead=dot];
+	295 -> "460E" [label=" ", color=blue, arrowhead=dot];
+	295 -> "462E" [label=" ", color=blue, arrowhead=dot];
+	295 -> "648E" [label=" ", color=blue, arrowhead=dot];
+	295 -> "656E" [label=" ", color=blue, arrowhead=dot];
+	295 -> "666E" [label=" ", color=blue, arrowhead=dot];
+	295 -> "692E" [label=" ", color=blue, arrowhead=dot];
+	295 -> "712E" [label=" ", color=blue, arrowhead=dot];
+	296 -> "47E" [label=" ", color=blue, arrowhead=dot];
+	296 -> "330E" [label=" ", color=blue, arrowhead=dot];
+	296 -> "514E" [label=" ", color=blue, arrowhead=dot];
+	296 -> "516E" [label=" ", color=blue, arrowhead=dot];
+	296 -> "518E" [label=" ", color=blue, arrowhead=dot];
+	296 -> "520E" [label=" ", color=blue, arrowhead=dot];
+	296 -> "522E" [label=" ", color=blue, arrowhead=dot];
+	296 -> "526E" [label=" ", color=blue, arrowhead=dot];
+	296 -> "528E" [label=" ", color=blue, arrowhead=dot];
+	296 -> "530E" [label=" ", color=blue, arrowhead=dot];
+	296 -> "532E" [label=" ", color=blue, arrowhead=dot];
+	296 -> "534E" [label=" ", color=blue, arrowhead=dot];
+	296 -> "536E" [label=" ", color=blue, arrowhead=dot];
+	296 -> "538E" [label=" ", color=blue, arrowhead=dot];
+	296 -> "540E" [label=" ", color=blue, arrowhead=dot];
+	296 -> "542E" [label=" ", color=blue, arrowhead=dot];
+	296 -> "544E" [label=" ", color=blue, arrowhead=dot];
+	297 -> "46E" [label=" ", color=blue, arrowhead=dot];
+	297 -> "93E" [label=" ", color=blue, arrowhead=dot];
+	297 -> "206E" [label=" ", color=blue, arrowhead=dot];
+	297 -> "426E" [label=" ", color=blue, arrowhead=dot];
+	297 -> "550E" [label=" ", color=blue, arrowhead=dot];
+	297 -> "706E" [label=" ", color=blue, arrowhead=dot];
+	298 -> "36E" [label=" ", color=blue, arrowhead=dot];
+	298 -> "95E" [label=" ", color=blue, arrowhead=dot];
+	298 -> "364E" [label=" ", color=blue, arrowhead=dot];
+	298 -> "394E" [label=" ", color=blue, arrowhead=dot];
+	298 -> "420E" [label=" ", color=blue, arrowhead=dot];
+	298 -> "456E" [label=" ", color=blue, arrowhead=dot];
+	298 -> "624E" [label=" ", color=blue, arrowhead=dot];
+	299 -> "48E" [label=" ", color=blue, arrowhead=dot];
+	299 -> "168E" [label=" ", color=blue, arrowhead=dot];
+	299 -> "260E" [label=" ", color=blue, arrowhead=dot];
+	299 -> "282E" [label=" ", color=blue, arrowhead=dot];
+	299 -> "554E" [label=" ", color=blue, arrowhead=dot];
+	299 -> "590E" [label=" ", color=blue, arrowhead=dot];
+	299 -> "767E" [label=" ", color=blue, arrowhead=dot];
+	300 -> "62E" [label=" ", color=blue, arrowhead=dot];
+	300 -> "190E" [label=" ", color=blue, arrowhead=dot];
+	300 -> "226E" [label=" ", color=blue, arrowhead=dot];
+	300 -> "238E" [label=" ", color=blue, arrowhead=dot];
+	300 -> "254E" [label=" ", color=blue, arrowhead=dot];
+	300 -> "256E" [label=" ", color=blue, arrowhead=dot];
+	300 -> "262E" [label=" ", color=blue, arrowhead=dot];
+	300 -> "266E" [label=" ", color=blue, arrowhead=dot];
+	300 -> "274E" [label=" ", color=blue, arrowhead=dot];
+	300 -> "276E" [label=" ", color=blue, arrowhead=dot];
+	300 -> "294E" [label=" ", color=blue, arrowhead=dot];
+	300 -> "296E" [label=" ", color=blue, arrowhead=dot];
+	300 -> "310E" [label=" ", color=blue, arrowhead=dot];
+	300 -> "320E" [label=" ", color=blue, arrowhead=dot];
+	300 -> "322E" [label=" ", color=blue, arrowhead=dot];
+	300 -> "332E" [label=" ", color=blue, arrowhead=dot];
+	300 -> "340E" [label=" ", color=blue, arrowhead=dot];
+	300 -> "344E" [label=" ", color=blue, arrowhead=dot];
+	300 -> "346E" [label=" ", color=blue, arrowhead=dot];
+	300 -> "348E" [label=" ", color=blue, arrowhead=dot];
+	300 -> "374E" [label=" ", color=blue, arrowhead=dot];
+	300 -> "378E" [label=" ", color=blue, arrowhead=dot];
+	300 -> "452E" [label=" ", color=blue, arrowhead=dot];
+	300 -> "508E" [label=" ", color=blue, arrowhead=dot];
+	300 -> "524E" [label=" ", color=blue, arrowhead=dot];
+	300 -> "612E" [label=" ", color=blue, arrowhead=dot];
+	300 -> "626E" [label=" ", color=blue, arrowhead=dot];
+	300 -> "638E" [label=" ", color=blue, arrowhead=dot];
+	300 -> "644E" [label=" ", color=blue, arrowhead=dot];
+	300 -> "654E" [label=" ", color=blue, arrowhead=dot];
+	300 -> "672E" [label=" ", color=blue, arrowhead=dot];
+	302 -> "797E" [label=" ", color=blue, arrowhead=dot];
+	302 -> "798E" [label=" ", color=blue, arrowhead=dot];
+	303 -> "52E" [label=" ", color=blue, arrowhead=dot];
+	303 -> "650E" [label=" ", color=blue, arrowhead=dot];
+	304 -> "50E" [label=" ", color=blue, arrowhead=dot];
+	304 -> "640E" [label=" ", color=blue, arrowhead=dot];
+	304 -> "646E" [label=" ", color=blue, arrowhead=dot];
+	304 -> "652E" [label=" ", color=blue, arrowhead=dot];
+	306 -> "55E" [label=" ", color=blue, arrowhead=dot];
+	306 -> "220E" [label=" ", color=blue, arrowhead=dot];
+	306 -> "338E" [label=" ", color=blue, arrowhead=dot];
+	306 -> "368E" [label=" ", color=blue, arrowhead=dot];
+	306 -> "486E" [label=" ", color=blue, arrowhead=dot];
+	306 -> "490E" [label=" ", color=blue, arrowhead=dot];
+	306 -> "562E" [label=" ", color=blue, arrowhead=dot];
+	306 -> "564E" [label=" ", color=blue, arrowhead=dot];
+	306 -> "600E" [label=" ", color=blue, arrowhead=dot];
+	306 -> "668E" [label=" ", color=blue, arrowhead=dot];
+	306 -> "674E" [label=" ", color=blue, arrowhead=dot];
+	306 -> "698E" [label=" ", color=blue, arrowhead=dot];
+	307 -> "107E" [label=" ", color=blue, arrowhead=dot];
+	308 -> "108E" [label=" ", color=blue, arrowhead=dot];
+	309 -> "109E" [label=" ", color=blue, arrowhead=dot];
+	310 -> "110E" [label=" ", color=blue, arrowhead=dot];
+	311 -> "58E" [label=" ", color=blue, arrowhead=dot];
+	311 -> "234E" [label=" ", color=blue, arrowhead=dot];
+	311 -> "300E" [label=" ", color=blue, arrowhead=dot];
+	311 -> "306E" [label=" ", color=blue, arrowhead=dot];
+	311 -> "314E" [label=" ", color=blue, arrowhead=dot];
+	311 -> "342E" [label=" ", color=blue, arrowhead=dot];
+	311 -> "354E" [label=" ", color=blue, arrowhead=dot];
+	311 -> "370E" [label=" ", color=blue, arrowhead=dot];
+	311 -> "382E" [label=" ", color=blue, arrowhead=dot];
+	311 -> "422E" [label=" ", color=blue, arrowhead=dot];
+	311 -> "444E" [label=" ", color=blue, arrowhead=dot];
+	311 -> "582E" [label=" ", color=blue, arrowhead=dot];
+	311 -> "620E" [label=" ", color=blue, arrowhead=dot];
+	311 -> "630E" [label=" ", color=blue, arrowhead=dot];
+	311 -> "684E" [label=" ", color=blue, arrowhead=dot];
+	311 -> "696E" [label=" ", color=blue, arrowhead=dot];
+	311 -> "801E" [label=" ", color=blue, arrowhead=dot];
+	312 -> "42E" [label=" ", color=blue, arrowhead=dot];
+	312 -> "192E" [label=" ", color=blue, arrowhead=dot];
+	312 -> "194E" [label=" ", color=blue, arrowhead=dot];
+	312 -> "196E" [label=" ", color=blue, arrowhead=dot];
+	312 -> "198E" [label=" ", color=blue, arrowhead=dot];
+	312 -> "200E" [label=" ", color=blue, arrowhead=dot];
+	312 -> "202E" [label=" ", color=blue, arrowhead=dot];
+	312 -> "204E" [label=" ", color=blue, arrowhead=dot];
+	312 -> "312E" [label=" ", color=blue, arrowhead=dot];
+	312 -> "336E" [label=" ", color=blue, arrowhead=dot];
+	312 -> "376E" [label=" ", color=blue, arrowhead=dot];
+	312 -> "384E" [label=" ", color=blue, arrowhead=dot];
+	312 -> "386E" [label=" ", color=blue, arrowhead=dot];
+	312 -> "428E" [label=" ", color=blue, arrowhead=dot];
+	312 -> "474E" [label=" ", color=blue, arrowhead=dot];
+	312 -> "484E" [label=" ", color=blue, arrowhead=dot];
+	312 -> "546E" [label=" ", color=blue, arrowhead=dot];
+	312 -> "548E" [label=" ", color=blue, arrowhead=dot];
+	314 -> "113E" [label=" ", color=blue, arrowhead=dot];
+	315 -> "43E" [label=" ", color=blue, arrowhead=dot];
+	315 -> "240E" [label=" ", color=blue, arrowhead=dot];
+	315 -> "298E" [label=" ", color=blue, arrowhead=dot];
+	315 -> "334E" [label=" ", color=blue, arrowhead=dot];
+	315 -> "360E" [label=" ", color=blue, arrowhead=dot];
+	315 -> "390E" [label=" ", color=blue, arrowhead=dot];
+	315 -> "418E" [label=" ", color=blue, arrowhead=dot];
+	315 -> "492E" [label=" ", color=blue, arrowhead=dot];
+	315 -> "502E" [label=" ", color=blue, arrowhead=dot];
+	315 -> "584E" [label=" ", color=blue, arrowhead=dot];
+	315 -> "588E" [label=" ", color=blue, arrowhead=dot];
+	315 -> "602E" [label=" ", color=blue, arrowhead=dot];
+	315 -> "606E" [label=" ", color=blue, arrowhead=dot];
+	315 -> "662E" [label=" ", color=blue, arrowhead=dot];
+	316 -> "51E" [label=" ", color=blue, arrowhead=dot];
+	317 -> "116E" [label=" ", color=blue, arrowhead=dot];
+	318 -> "74E" [label=" ", color=blue, arrowhead=dot];
+	319 -> "57E" [label=" ", color=blue, arrowhead=dot];
+	319 -> "94E" [label=" ", color=blue, arrowhead=dot];
+	319 -> "350E" [label=" ", color=blue, arrowhead=dot];
+	319 -> "440E" [label=" ", color=blue, arrowhead=dot];
+	319 -> "466E" [label=" ", color=blue, arrowhead=dot];
+	319 -> "676E" [label=" ", color=blue, arrowhead=dot];
+	320 -> "60E" [label=" ", color=blue, arrowhead=dot];
+	320 -> "366E" [label=" ", color=blue, arrowhead=dot];
+	320 -> "434E" [label=" ", color=blue, arrowhead=dot];
+	320 -> "458E" [label=" ", color=blue, arrowhead=dot];
+	320 -> "618E" [label=" ", color=blue, arrowhead=dot];
+	321 -> "72E" [label=" ", color=blue, arrowhead=dot];
+	321 -> "362E" [label=" ", color=blue, arrowhead=dot];
+	321 -> "372E" [label=" ", color=blue, arrowhead=dot];
+	321 -> "572E" [label=" ", color=blue, arrowhead=dot];
+	322 -> "54E" [label=" ", color=blue, arrowhead=dot];
+	322 -> "222E" [label=" ", color=blue, arrowhead=dot];
+	322 -> "302E" [label=" ", color=blue, arrowhead=dot];
+	322 -> "556E" [label=" ", color=blue, arrowhead=dot];
+	322 -> "558E" [label=" ", color=blue, arrowhead=dot];
+	323 -> "37E" [label=" ", color=blue, arrowhead=dot];
+	323 -> "208E" [label=" ", color=blue, arrowhead=dot];
+	323 -> "210E" [label=" ", color=blue, arrowhead=dot];
+	323 -> "352E" [label=" ", color=blue, arrowhead=dot];
+	323 -> "450E" [label=" ", color=blue, arrowhead=dot];
+	323 -> "568E" [label=" ", color=blue, arrowhead=dot];
+	323 -> "576E" [label=" ", color=blue, arrowhead=dot];
+	323 -> "686E" [label=" ", color=blue, arrowhead=dot];
+	324 -> "228E" [label=" ", color=blue, arrowhead=dot];
+	324 -> "248E" [label=" ", color=blue, arrowhead=dot];
+	324 -> "304E" [label=" ", color=blue, arrowhead=dot];
+	324 -> "468E" [label=" ", color=blue, arrowhead=dot];
+	324 -> "578E" [label=" ", color=blue, arrowhead=dot];
+	324 -> "660E" [label=" ", color=blue, arrowhead=dot];
+	324 -> "688E" [label=" ", color=blue, arrowhead=dot];
+	324 -> "694E" [label=" ", color=blue, arrowhead=dot];
+	324 -> "714E" [label=" ", color=blue, arrowhead=dot];
+	324 -> "766E" [label=" ", color=blue, arrowhead=dot];
+	325 -> "97E" [label=" ", color=blue, arrowhead=dot];
+	325 -> "506E" [label=" ", color=blue, arrowhead=dot];
+	326 -> "61E" [label=" ", color=blue, arrowhead=dot];
+	326 -> "175E" [label=" ", color=blue, arrowhead=dot];
+	326 -> "482E" [label=" ", color=blue, arrowhead=dot];
+	328 -> "75E" [label=" ", color=blue, arrowhead=dot];
+	328 -> "580E" [label=" ", color=blue, arrowhead=dot];
+	329 -> "96E" [label=" ", color=blue, arrowhead=dot];
+	330 -> "100E" [label=" ", color=blue, arrowhead=dot];
+	330 -> "170E" [label=" ", color=blue, arrowhead=dot];
+	333 -> "63E" [label=" ", color=blue, arrowhead=dot];
+	333 -> "67E" [label=" ", color=blue, arrowhead=dot];
+	333 -> "68E" [label=" ", color=blue, arrowhead=dot];
+	333 -> "69E" [label=" ", color=blue, arrowhead=dot];
+	333 -> "70E" [label=" ", color=blue, arrowhead=dot];
+	333 -> "71E" [label=" ", color=blue, arrowhead=dot];
+	333 -> "802E" [label=" ", color=blue, arrowhead=dot];
+	333 -> "793E" [label=" ", color=blue, arrowhead=dot];
+	334 -> "64E" [label=" ", color=blue, arrowhead=dot];
+	334 -> "81E" [label=" ", color=blue, arrowhead=dot];
+	334 -> "82E" [label=" ", color=blue, arrowhead=dot];
+	334 -> "83E" [label=" ", color=blue, arrowhead=dot];
+	334 -> "84E" [label=" ", color=blue, arrowhead=dot];
+	334 -> "85E" [label=" ", color=blue, arrowhead=dot];
+	334 -> "86E" [label=" ", color=blue, arrowhead=dot];
+	334 -> "87E" [label=" ", color=blue, arrowhead=dot];
+	334 -> "88E" [label=" ", color=blue, arrowhead=dot];
+	334 -> "89E" [label=" ", color=blue, arrowhead=dot];
+	336 -> "1E" [label=" ", color=blue, arrowhead=dot];
+	336 -> "2E" [label=" ", color=blue, arrowhead=dot];
+	336 -> "3E" [label=" ", color=blue, arrowhead=dot];
+	336 -> "4E" [label=" ", color=blue, arrowhead=dot];
+	336 -> "5E" [label=" ", color=blue, arrowhead=dot];
+	336 -> "6E" [label=" ", color=blue, arrowhead=dot];
+	336 -> "7E" [label=" ", color=blue, arrowhead=dot];
+	336 -> "8E" [label=" ", color=blue, arrowhead=dot];
+	336 -> "9E" [label=" ", color=blue, arrowhead=dot];
+	336 -> "10E" [label=" ", color=blue, arrowhead=dot];
+	336 -> "11E" [label=" ", color=blue, arrowhead=dot];
+	336 -> "12E" [label=" ", color=blue, arrowhead=dot];
+	336 -> "13E" [label=" ", color=blue, arrowhead=dot];
+	336 -> "14E" [label=" ", color=blue, arrowhead=dot];
+	336 -> "15E" [label=" ", color=blue, arrowhead=dot];
+	336 -> "16E" [label=" ", color=blue, arrowhead=dot];
+	336 -> "17E" [label=" ", color=blue, arrowhead=dot];
+	336 -> "18E" [label=" ", color=blue, arrowhead=dot];
+	336 -> "19E" [label=" ", color=blue, arrowhead=dot];
+	336 -> "20E" [label=" ", color=blue, arrowhead=dot];
+	336 -> "21E" [label=" ", color=blue, arrowhead=dot];
+	336 -> "22E" [label=" ", color=blue, arrowhead=dot];
+	336 -> "23E" [label=" ", color=blue, arrowhead=dot];
+	336 -> "24E" [label=" ", color=blue, arrowhead=dot];
+	336 -> "25E" [label=" ", color=blue, arrowhead=dot];
+	336 -> "26E" [label=" ", color=blue, arrowhead=dot];
+	336 -> "27E" [label=" ", color=blue, arrowhead=dot];
+	336 -> "28E" [label=" ", color=blue, arrowhead=dot];
+	336 -> "29E" [label=" ", color=blue, arrowhead=dot];
+	336 -> "30E" [label=" ", color=blue, arrowhead=dot];
+	336 -> "31E" [label=" ", color=blue, arrowhead=dot];
+	336 -> "65E" [label=" ", color=blue, arrowhead=dot];
+	336 -> "119E" [label=" ", color=blue, arrowhead=dot];
+	336 -> "150E" [label=" ", color=blue, arrowhead=dot];
+	336 -> "176E" [label=" ", color=blue, arrowhead=dot];
+	336 -> "743E" [label=" ", color=blue, arrowhead=dot];
+	336 -> "744E" [label=" ", color=blue, arrowhead=dot];
+	336 -> "764E" [label=" ", color=blue, arrowhead=dot];
+	337 -> "120E" [label=" ", color=blue, arrowhead=dot];
+	337 -> "121E" [label=" ", color=blue, arrowhead=dot];
+	337 -> "122E" [label=" ", color=blue, arrowhead=dot];
+	337 -> "123E" [label=" ", color=blue, arrowhead=dot];
+	337 -> "124E" [label=" ", color=blue, arrowhead=dot];
+	337 -> "125E" [label=" ", color=blue, arrowhead=dot];
+	337 -> "126E" [label=" ", color=blue, arrowhead=dot];
+	337 -> "127E" [label=" ", color=blue, arrowhead=dot];
+	337 -> "128E" [label=" ", color=blue, arrowhead=dot];
+	337 -> "129E" [label=" ", color=blue, arrowhead=dot];
+	337 -> "130E" [label=" ", color=blue, arrowhead=dot];
+	337 -> "131E" [label=" ", color=blue, arrowhead=dot];
+	337 -> "132E" [label=" ", color=blue, arrowhead=dot];
+	337 -> "133E" [label=" ", color=blue, arrowhead=dot];
+	337 -> "134E" [label=" ", color=blue, arrowhead=dot];
+	337 -> "135E" [label=" ", color=blue, arrowhead=dot];
+	337 -> "136E" [label=" ", color=blue, arrowhead=dot];
+	337 -> "137E" [label=" ", color=blue, arrowhead=dot];
+	337 -> "138E" [label=" ", color=blue, arrowhead=dot];
+	339 -> "151E" [label=" ", color=blue, arrowhead=dot];
+	339 -> "153E" [label=" ", color=blue, arrowhead=dot];
+	339 -> "154E" [label=" ", color=blue, arrowhead=dot];
+	339 -> "155E" [label=" ", color=blue, arrowhead=dot];
+	339 -> "156E" [label=" ", color=blue, arrowhead=dot];
+	339 -> "157E" [label=" ", color=blue, arrowhead=dot];
+	339 -> "158E" [label=" ", color=blue, arrowhead=dot];
+	339 -> "159E" [label=" ", color=blue, arrowhead=dot];
+	339 -> "160E" [label=" ", color=blue, arrowhead=dot];
+	339 -> "161E" [label=" ", color=blue, arrowhead=dot];
+	339 -> "162E" [label=" ", color=blue, arrowhead=dot];
+	347 -> "139E" [label=" ", color=blue, arrowhead=dot];
+	347 -> "795E" [label=" ", color=blue, arrowhead=dot];
+	348 -> "799E" [label=" ", color=blue, arrowhead=dot];
+	348 -> "800E" [label=" ", color=blue, arrowhead=dot];
+	349 -> "141E" [label=" ", color=blue, arrowhead=dot];
+	350 -> "142E" [label=" ", color=blue, arrowhead=dot];
+	350 -> "678E" [label=" ", color=blue, arrowhead=dot];
+	351 -> "143E" [label=" ", color=blue, arrowhead=dot];
+	351 -> "232E" [label=" ", color=blue, arrowhead=dot];
+	351 -> "680E" [label=" ", color=blue, arrowhead=dot];
+	351 -> "704E" [label=" ", color=blue, arrowhead=dot];
+	352 -> "144E" [label=" ", color=blue, arrowhead=dot];
+	352 -> "432E" [label=" ", color=blue, arrowhead=dot];
+	353 -> "145E" [label=" ", color=blue, arrowhead=dot];
+	354 -> "146E" [label=" ", color=blue, arrowhead=dot];
+	354 -> "396E" [label=" ", color=blue, arrowhead=dot];
+	355 -> "147E" [label=" ", color=blue, arrowhead=dot];
+	356 -> "148E" [label=" ", color=blue, arrowhead=dot];
+	357 -> "149E" [label=" ", color=blue, arrowhead=dot];
+	358 -> "167E" [label=" ", color=blue, arrowhead=dot];
+	359 -> "169E" [label=" ", color=blue, arrowhead=dot];
+	360 -> "171E" [label=" ", color=blue, arrowhead=dot];
+	361 -> "172E" [label=" ", color=blue, arrowhead=dot];
+	362 -> "173E" [label=" ", color=blue, arrowhead=dot];
+	363 -> "174E" [label=" ", color=blue, arrowhead=dot];
+	364 -> "101E" [label=" ", color=blue, arrowhead=dot];
+	365 -> "102E" [label=" ", color=blue, arrowhead=dot];
+	367 -> "104E" [label=" ", color=blue, arrowhead=dot];
+	368 -> "105E" [label=" ", color=blue, arrowhead=dot];
+	369 -> "106E" [label=" ", color=blue, arrowhead=dot];
+	374 -> "111E" [label=" ", color=blue, arrowhead=dot];
+	375 -> "112E" [label=" ", color=blue, arrowhead=dot];
+	377 -> "114E" [label=" ", color=blue, arrowhead=dot];
+	378 -> "115E" [label=" ", color=blue, arrowhead=dot];
+	380 -> "117E" [label=" ", color=blue, arrowhead=dot];
+	380 -> "392E" [label=" ", color=blue, arrowhead=dot];
+	381 -> "118E" [label=" ", color=blue, arrowhead=dot];
+	382 -> "177E" [label=" ", color=blue, arrowhead=dot];
+	382 -> "178E" [label=" ", color=blue, arrowhead=dot];
+	382 -> "179E" [label=" ", color=blue, arrowhead=dot];
+	382 -> "180E" [label=" ", color=blue, arrowhead=dot];
+	382 -> "181E" [label=" ", color=blue, arrowhead=dot];
+	382 -> "182E" [label=" ", color=blue, arrowhead=dot];
+	382 -> "183E" [label=" ", color=blue, arrowhead=dot];
+	382 -> "184E" [label=" ", color=blue, arrowhead=dot];
+	382 -> "185E" [label=" ", color=blue, arrowhead=dot];
+	382 -> "186E" [label=" ", color=blue, arrowhead=dot];
+	382 -> "187E" [label=" ", color=blue, arrowhead=dot];
+	382 -> "188E" [label=" ", color=blue, arrowhead=dot];
+	383 -> "730E" [label=" ", color=blue, arrowhead=dot];
+	383 -> "732E" [label=" ", color=blue, arrowhead=dot];
+	383 -> "741E" [label=" ", color=blue, arrowhead=dot];
+	383 -> "765E" [label=" ", color=blue, arrowhead=dot];
+	383 -> "796E" [label=" ", color=blue, arrowhead=dot];
+	384 -> "726E" [label=" ", color=blue, arrowhead=dot];
+	384 -> "728E" [label=" ", color=blue, arrowhead=dot];
+	384 -> "742E" [label=" ", color=blue, arrowhead=dot];
+	"1E" -> "34E" [color=purple, arrowhead=none];
+	"2E" -> "35E" [color=purple, arrowhead=none];
+	"3E" -> "36E" [color=purple, arrowhead=none];
+	"4E" -> "37E" [color=purple, arrowhead=none];
+	"5E" -> "38E" [color=purple, arrowhead=none];
+	"6E" -> "39E" [color=purple, arrowhead=none];
+	"7E" -> "40E" [color=purple, arrowhead=none];
+	"9E" -> "41E" [color=purple, arrowhead=none];
+	"10E" -> "42E" [color=purple, arrowhead=none];
+	"11E" -> "43E" [color=purple, arrowhead=none];
+	"12E" -> "44E" [color=purple, arrowhead=none];
+	"13E" -> "45E" [color=purple, arrowhead=none];
+	"14E" -> "46E" [color=purple, arrowhead=none];
+	"15E" -> "47E" [color=purple, arrowhead=none];
+	"16E" -> "48E" [color=purple, arrowhead=none];
+	"49E" -> "17E" [color=purple, arrowhead=none];
+	"18E" -> "50E" [color=purple, arrowhead=none];
+	"19E" -> "51E" [color=purple, arrowhead=none];
+	"20E" -> "52E" [color=purple, arrowhead=none];
+	"21E" -> "53E" [color=purple, arrowhead=none];
+	"22E" -> "54E" [color=purple, arrowhead=none];
+	"23E" -> "55E" [color=purple, arrowhead=none];
+	"24E" -> "56E" [color=purple, arrowhead=none];
+	"25E" -> "57E" [color=purple, arrowhead=none];
+	"26E" -> "58E" [color=purple, arrowhead=none];
+	"27E" -> "59E" [color=purple, arrowhead=none];
+	"28E" -> "60E" [color=purple, arrowhead=none];
+	"29E" -> "61E" [color=purple, arrowhead=none];
+	"30E" -> "62E" [color=purple, arrowhead=none];
+	"31E" -> "63E" [color=purple, arrowhead=none];
+	"64E" -> "65E" [color=purple, arrowhead=none];
+	"66E" -> "8E" [color=purple, arrowhead=none];
+	"71E" -> "76E" [color=purple, arrowhead=none];
+	"67E" -> "72E" [color=purple, arrowhead=none];
+	"68E" -> "73E" [color=purple, arrowhead=none];
+	"69E" -> "74E" [color=purple, arrowhead=none];
+	"70E" -> "75E" [color=purple, arrowhead=none];
+	"81E" -> "92E" [color=purple, arrowhead=none];
+	"82E" -> "93E" [color=purple, arrowhead=none];
+	"83E" -> "94E" [color=purple, arrowhead=none];
+	"84E" -> "95E" [color=purple, arrowhead=none];
+	"85E" -> "96E" [color=purple, arrowhead=none];
+	"86E" -> "97E" [color=purple, arrowhead=none];
+	"87E" -> "98E" [color=purple, arrowhead=none];
+	"88E" -> "99E" [color=purple, arrowhead=none];
+	"89E" -> "100E" [color=purple, arrowhead=none];
+	"101E" -> "120E" [color=purple, arrowhead=none];
+	"102E" -> "121E" [color=purple, arrowhead=none];
+	"103E" -> "122E" [color=purple, arrowhead=none];
+	"104E" -> "123E" [color=purple, arrowhead=none];
+	"105E" -> "124E" [color=purple, arrowhead=none];
+	"106E" -> "125E" [color=purple, arrowhead=none];
+	"107E" -> "126E" [color=purple, arrowhead=none];
+	"108E" -> "127E" [color=purple, arrowhead=none];
+	"109E" -> "128E" [color=purple, arrowhead=none];
+	"110E" -> "129E" [color=purple, arrowhead=none];
+	"111E" -> "130E" [color=purple, arrowhead=none];
+	"112E" -> "131E" [color=purple, arrowhead=none];
+	"113E" -> "132E" [color=purple, arrowhead=none];
+	"114E" -> "133E" [color=purple, arrowhead=none];
+	"115E" -> "134E" [color=purple, arrowhead=none];
+	"116E" -> "135E" [color=purple, arrowhead=none];
+	"117E" -> "136E" [color=purple, arrowhead=none];
+	"118E" -> "137E" [color=purple, arrowhead=none];
+	"119E" -> "138E" [color=purple, arrowhead=none];
+	"139E" -> "151E" [color=purple, arrowhead=none];
+	"141E" -> "153E" [color=purple, arrowhead=none];
+	"142E" -> "154E" [color=purple, arrowhead=none];
+	"143E" -> "155E" [color=purple, arrowhead=none];
+	"144E" -> "156E" [color=purple, arrowhead=none];
+	"145E" -> "157E" [color=purple, arrowhead=none];
+	"146E" -> "158E" [color=purple, arrowhead=none];
+	"147E" -> "159E" [color=purple, arrowhead=none];
+	"148E" -> "160E" [color=purple, arrowhead=none];
+	"149E" -> "161E" [color=purple, arrowhead=none];
+	"150E" -> "162E" [color=purple, arrowhead=none];
+	"165E" -> "177E" [color=purple, arrowhead=none];
+	"166E" -> "178E" [color=purple, arrowhead=none];
+	"167E" -> "179E" [color=purple, arrowhead=none];
+	"168E" -> "180E" [color=purple, arrowhead=none];
+	"169E" -> "181E" [color=purple, arrowhead=none];
+	"170E" -> "182E" [color=purple, arrowhead=none];
+	"171E" -> "183E" [color=purple, arrowhead=none];
+	"172E" -> "184E" [color=purple, arrowhead=none];
+	"173E" -> "185E" [color=purple, arrowhead=none];
+	"174E" -> "186E" [color=purple, arrowhead=none];
+	"175E" -> "187E" [color=purple, arrowhead=none];
+	"176E" -> "188E" [color=purple, arrowhead=none];
+	"189E" -> "190E" [color=purple, arrowhead=none];
+	"191E" -> "192E" [color=purple, arrowhead=none];
+	"193E" -> "194E" [color=purple, arrowhead=none];
+	"195E" -> "196E" [color=purple, arrowhead=none];
+	"197E" -> "198E" [color=purple, arrowhead=none];
+	"199E" -> "200E" [color=purple, arrowhead=none];
+	"201E" -> "202E" [color=purple, arrowhead=none];
+	"203E" -> "204E" [color=purple, arrowhead=none];
+	"205E" -> "206E" [color=purple, arrowhead=none];
+	"207E" -> "208E" [color=purple, arrowhead=none];
+	"209E" -> "210E" [color=purple, arrowhead=none];
+	"412E" -> "211E" [color=purple, arrowhead=none];
+	"214E" -> "213E" [color=purple, arrowhead=none];
+	"216E" -> "215E" [color=purple, arrowhead=none];
+	"217E" -> "218E" [color=purple, arrowhead=none];
+	"219E" -> "220E" [color=purple, arrowhead=none];
+	"221E" -> "222E" [color=purple, arrowhead=none];
+	"223E" -> "224E" [color=purple, arrowhead=none];
+	"225E" -> "226E" [color=purple, arrowhead=none];
+	"227E" -> "228E" [color=purple, arrowhead=none];
+	"231E" -> "232E" [color=purple, arrowhead=none];
+	"233E" -> "234E" [color=purple, arrowhead=none];
+	"236E" -> "235E" [color=purple, arrowhead=none];
+	"237E" -> "238E" [color=purple, arrowhead=none];
+	"239E" -> "240E" [color=purple, arrowhead=none];
+	"241E" -> "242E" [color=purple, arrowhead=none];
+	"243E" -> "244E" [color=purple, arrowhead=none];
+	"245E" -> "246E" [color=purple, arrowhead=none];
+	"247E" -> "248E" [color=purple, arrowhead=none];
+	"249E" -> "250E" [color=purple, arrowhead=none];
+	"251E" -> "252E" [color=purple, arrowhead=none];
+	"253E" -> "254E" [color=purple, arrowhead=none];
+	"255E" -> "256E" [color=purple, arrowhead=none];
+	"257E" -> "258E" [color=purple, arrowhead=none];
+	"259E" -> "260E" [color=purple, arrowhead=none];
+	"261E" -> "262E" [color=purple, arrowhead=none];
+	"263E" -> "264E" [color=purple, arrowhead=none];
+	"265E" -> "266E" [color=purple, arrowhead=none];
+	"267E" -> "268E" [color=purple, arrowhead=none];
+	"269E" -> "270E" [color=purple, arrowhead=none];
+	"271E" -> "272E" [color=purple, arrowhead=none];
+	"273E" -> "274E" [color=purple, arrowhead=none];
+	"275E" -> "276E" [color=purple, arrowhead=none];
+	"278E" -> "277E" [color=purple, arrowhead=none];
+	"279E" -> "767E" [color=purple, arrowhead=none];
+	"281E" -> "282E" [color=purple, arrowhead=none];
+	"283E" -> "284E" [color=purple, arrowhead=none];
+	"285E" -> "286E" [color=purple, arrowhead=none];
+	"768E" -> "287E" [color=purple, arrowhead=none];
+	"289E" -> "290E" [color=purple, arrowhead=none];
+	"291E" -> "292E" [color=purple, arrowhead=none];
+	"293E" -> "294E" [color=purple, arrowhead=none];
+	"295E" -> "296E" [color=purple, arrowhead=none];
+	"297E" -> "298E" [color=purple, arrowhead=none];
+	"299E" -> "300E" [color=purple, arrowhead=none];
+	"301E" -> "302E" [color=purple, arrowhead=none];
+	"303E" -> "304E" [color=purple, arrowhead=none];
+	"305E" -> "306E" [color=purple, arrowhead=none];
+	"307E" -> "308E" [color=purple, arrowhead=none];
+	"309E" -> "310E" [color=purple, arrowhead=none];
+	"311E" -> "312E" [color=purple, arrowhead=none];
+	"313E" -> "314E" [color=purple, arrowhead=none];
+	"315E" -> "316E" [color=purple, arrowhead=none];
+	"317E" -> "318E" [color=purple, arrowhead=none];
+	"319E" -> "320E" [color=purple, arrowhead=none];
+	"321E" -> "322E" [color=purple, arrowhead=none];
+	"327E" -> "800E" [color=purple, arrowhead=none];
+	"329E" -> "330E" [color=purple, arrowhead=none];
+	"331E" -> "332E" [color=purple, arrowhead=none];
+	"333E" -> "334E" [color=purple, arrowhead=none];
+	"335E" -> "336E" [color=purple, arrowhead=none];
+	"337E" -> "338E" [color=purple, arrowhead=none];
+	"339E" -> "340E" [color=purple, arrowhead=none];
+	"341E" -> "342E" [color=purple, arrowhead=none];
+	"343E" -> "344E" [color=purple, arrowhead=none];
+	"345E" -> "346E" [color=purple, arrowhead=none];
+	"347E" -> "348E" [color=purple, arrowhead=none];
+	"349E" -> "350E" [color=purple, arrowhead=none];
+	"351E" -> "352E" [color=purple, arrowhead=none];
+	"353E" -> "354E" [color=purple, arrowhead=none];
+	"412E" -> "355E" [color=purple, arrowhead=none];
+	"357E" -> "358E" [color=purple, arrowhead=none];
+	"359E" -> "360E" [color=purple, arrowhead=none];
+	"361E" -> "362E" [color=purple, arrowhead=none];
+	"363E" -> "364E" [color=purple, arrowhead=none];
+	"365E" -> "366E" [color=purple, arrowhead=none];
+	"367E" -> "368E" [color=purple, arrowhead=none];
+	"369E" -> "370E" [color=purple, arrowhead=none];
+	"371E" -> "372E" [color=purple, arrowhead=none];
+	"373E" -> "374E" [color=purple, arrowhead=none];
+	"375E" -> "376E" [color=purple, arrowhead=none];
+	"377E" -> "378E" [color=purple, arrowhead=none];
+	"379E" -> "380E" [color=purple, arrowhead=none];
+	"381E" -> "382E" [color=purple, arrowhead=none];
+	"383E" -> "384E" [color=purple, arrowhead=none];
+	"385E" -> "386E" [color=purple, arrowhead=none];
+	"387E" -> "388E" [color=purple, arrowhead=none];
+	"389E" -> "390E" [color=purple, arrowhead=none];
+	"391E" -> "392E" [color=purple, arrowhead=none];
+	"393E" -> "394E" [color=purple, arrowhead=none];
+	"395E" -> "396E" [color=purple, arrowhead=none];
+	"397E" -> "398E" [color=purple, arrowhead=none];
+	"399E" -> "400E" [color=purple, arrowhead=none];
+	"402E" -> "401E" [color=purple, arrowhead=none];
+	"404E" -> "403E" [color=purple, arrowhead=none];
+	"406E" -> "405E" [color=purple, arrowhead=none];
+	"408E" -> "407E" [color=purple, arrowhead=none];
+	"236E" -> "409E" [color=purple, arrowhead=none];
+	"412E" -> "411E" [color=purple, arrowhead=none];
+	"412E" -> "413E" [color=purple, arrowhead=none];
+	"278E" -> "415E" [color=purple, arrowhead=none];
+	"417E" -> "418E" [color=purple, arrowhead=none];
+	"419E" -> "420E" [color=purple, arrowhead=none];
+	"421E" -> "422E" [color=purple, arrowhead=none];
+	"423E" -> "424E" [color=purple, arrowhead=none];
+	"425E" -> "426E" [color=purple, arrowhead=none];
+	"427E" -> "428E" [color=purple, arrowhead=none];
+	"431E" -> "432E" [color=purple, arrowhead=none];
+	"433E" -> "434E" [color=purple, arrowhead=none];
+	"435E" -> "436E" [color=purple, arrowhead=none];
+	"438E" -> "437E" [color=purple, arrowhead=none];
+	"439E" -> "440E" [color=purple, arrowhead=none];
+	"441E" -> "442E" [color=purple, arrowhead=none];
+	"443E" -> "444E" [color=purple, arrowhead=none];
+	"445E" -> "446E" [color=purple, arrowhead=none];
+	"448E" -> "447E" [color=purple, arrowhead=none];
+	"449E" -> "450E" [color=purple, arrowhead=none];
+	"451E" -> "452E" [color=purple, arrowhead=none];
+	"453E" -> "454E" [color=purple, arrowhead=none];
+	"455E" -> "456E" [color=purple, arrowhead=none];
+	"457E" -> "458E" [color=purple, arrowhead=none];
+	"459E" -> "460E" [color=purple, arrowhead=none];
+	"461E" -> "462E" [color=purple, arrowhead=none];
+	"236E" -> "463E" [color=purple, arrowhead=none];
+	"465E" -> "466E" [color=purple, arrowhead=none];
+	"467E" -> "468E" [color=purple, arrowhead=none];
+	"469E" -> "470E" [color=purple, arrowhead=none];
+	"471E" -> "472E" [color=purple, arrowhead=none];
+	"473E" -> "474E" [color=purple, arrowhead=none];
+	"476E" -> "475E" [color=purple, arrowhead=none];
+	"477E" -> "478E" [color=purple, arrowhead=none];
+	"479E" -> "358E" [color=purple, arrowhead=none];
+	"481E" -> "482E" [color=purple, arrowhead=none];
+	"483E" -> "484E" [color=purple, arrowhead=none];
+	"485E" -> "486E" [color=purple, arrowhead=none];
+	"487E" -> "488E" [color=purple, arrowhead=none];
+	"489E" -> "490E" [color=purple, arrowhead=none];
+	"491E" -> "492E" [color=purple, arrowhead=none];
+	"495E" -> "795E" [color=purple, arrowhead=none];
+	"499E" -> "500E" [color=purple, arrowhead=none];
+	"501E" -> "502E" [color=purple, arrowhead=none];
+	"504E" -> "503E" [color=purple, arrowhead=none];
+	"505E" -> "506E" [color=purple, arrowhead=none];
+	"507E" -> "508E" [color=purple, arrowhead=none];
+	"509E" -> "510E" [color=purple, arrowhead=none];
+	"412E" -> "511E" [color=purple, arrowhead=none];
+	"513E" -> "514E" [color=purple, arrowhead=none];
+	"515E" -> "516E" [color=purple, arrowhead=none];
+	"517E" -> "518E" [color=purple, arrowhead=none];
+	"519E" -> "520E" [color=purple, arrowhead=none];
+	"521E" -> "522E" [color=purple, arrowhead=none];
+	"523E" -> "524E" [color=purple, arrowhead=none];
+	"525E" -> "526E" [color=purple, arrowhead=none];
+	"527E" -> "528E" [color=purple, arrowhead=none];
+	"529E" -> "530E" [color=purple, arrowhead=none];
+	"531E" -> "532E" [color=purple, arrowhead=none];
+	"533E" -> "534E" [color=purple, arrowhead=none];
+	"535E" -> "536E" [color=purple, arrowhead=none];
+	"537E" -> "538E" [color=purple, arrowhead=none];
+	"539E" -> "540E" [color=purple, arrowhead=none];
+	"541E" -> "542E" [color=purple, arrowhead=none];
+	"543E" -> "544E" [color=purple, arrowhead=none];
+	"545E" -> "546E" [color=purple, arrowhead=none];
+	"547E" -> "548E" [color=purple, arrowhead=none];
+	"549E" -> "550E" [color=purple, arrowhead=none];
+	"551E" -> "552E" [color=purple, arrowhead=none];
+	"553E" -> "554E" [color=purple, arrowhead=none];
+	"555E" -> "556E" [color=purple, arrowhead=none];
+	"557E" -> "558E" [color=purple, arrowhead=none];
+	"278E" -> "559E" [color=purple, arrowhead=none];
+	"561E" -> "562E" [color=purple, arrowhead=none];
+	"563E" -> "564E" [color=purple, arrowhead=none];
+	"565E" -> "566E" [color=purple, arrowhead=none];
+	"567E" -> "568E" [color=purple, arrowhead=none];
+	"569E" -> "570E" [color=purple, arrowhead=none];
+	"571E" -> "572E" [color=purple, arrowhead=none];
+	"573E" -> "574E" [color=purple, arrowhead=none];
+	"575E" -> "576E" [color=purple, arrowhead=none];
+	"577E" -> "578E" [color=purple, arrowhead=none];
+	"579E" -> "580E" [color=purple, arrowhead=none];
+	"581E" -> "582E" [color=purple, arrowhead=none];
+	"583E" -> "584E" [color=purple, arrowhead=none];
+	"585E" -> "586E" [color=purple, arrowhead=none];
+	"587E" -> "588E" [color=purple, arrowhead=none];
+	"589E" -> "590E" [color=purple, arrowhead=none];
+	"597E" -> "598E" [color=purple, arrowhead=none];
+	"599E" -> "600E" [color=purple, arrowhead=none];
+	"601E" -> "602E" [color=purple, arrowhead=none];
+	"603E" -> "604E" [color=purple, arrowhead=none];
+	"605E" -> "606E" [color=purple, arrowhead=none];
+	"607E" -> "608E" [color=purple, arrowhead=none];
+	"609E" -> "610E" [color=purple, arrowhead=none];
+	"611E" -> "612E" [color=purple, arrowhead=none];
+	"613E" -> "614E" [color=purple, arrowhead=none];
+	"615E" -> "358E" [color=purple, arrowhead=none];
+	"617E" -> "618E" [color=purple, arrowhead=none];
+	"619E" -> "620E" [color=purple, arrowhead=none];
+	"623E" -> "624E" [color=purple, arrowhead=none];
+	"625E" -> "626E" [color=purple, arrowhead=none];
+	"627E" -> "628E" [color=purple, arrowhead=none];
+	"629E" -> "630E" [color=purple, arrowhead=none];
+	"631E" -> "632E" [color=purple, arrowhead=none];
+	"634E" -> "633E" [color=purple, arrowhead=none];
+	"635E" -> "636E" [color=purple, arrowhead=none];
+	"637E" -> "638E" [color=purple, arrowhead=none];
+	"639E" -> "640E" [color=purple, arrowhead=none];
+	"641E" -> "642E" [color=purple, arrowhead=none];
+	"643E" -> "644E" [color=purple, arrowhead=none];
+	"645E" -> "646E" [color=purple, arrowhead=none];
+	"647E" -> "648E" [color=purple, arrowhead=none];
+	"649E" -> "650E" [color=purple, arrowhead=none];
+	"651E" -> "652E" [color=purple, arrowhead=none];
+	"653E" -> "654E" [color=purple, arrowhead=none];
+	"655E" -> "656E" [color=purple, arrowhead=none];
+	"657E" -> "658E" [color=purple, arrowhead=none];
+	"659E" -> "660E" [color=purple, arrowhead=none];
+	"661E" -> "662E" [color=purple, arrowhead=none];
+	"663E" -> "664E" [color=purple, arrowhead=none];
+	"665E" -> "666E" [color=purple, arrowhead=none];
+	"667E" -> "668E" [color=purple, arrowhead=none];
+	"669E" -> "670E" [color=purple, arrowhead=none];
+	"671E" -> "672E" [color=purple, arrowhead=none];
+	"673E" -> "674E" [color=purple, arrowhead=none];
+	"675E" -> "676E" [color=purple, arrowhead=none];
+	"679E" -> "680E" [color=purple, arrowhead=none];
+	"681E" -> "682E" [color=purple, arrowhead=none];
+	"683E" -> "684E" [color=purple, arrowhead=none];
+	"685E" -> "686E" [color=purple, arrowhead=none];
+	"687E" -> "688E" [color=purple, arrowhead=none];
+	"689E" -> "690E" [color=purple, arrowhead=none];
+	"691E" -> "692E" [color=purple, arrowhead=none];
+	"693E" -> "694E" [color=purple, arrowhead=none];
+	"695E" -> "696E" [color=purple, arrowhead=none];
+	"697E" -> "698E" [color=purple, arrowhead=none];
+	"699E" -> "700E" [color=purple, arrowhead=none];
+	"703E" -> "704E" [color=purple, arrowhead=none];
+	"705E" -> "706E" [color=purple, arrowhead=none];
+	"709E" -> "710E" [color=purple, arrowhead=none];
+	"711E" -> "712E" [color=purple, arrowhead=none];
+	"713E" -> "714E" [color=purple, arrowhead=none];
+	"715E" -> "398E" [color=purple, arrowhead=none];
+	"717E" -> "718E" [color=purple, arrowhead=none];
+	"719E" -> "720E" [color=purple, arrowhead=none];
+	"721E" -> "722E" [color=purple, arrowhead=none];
+	"725E" -> "726E" [color=purple, arrowhead=none];
+	"727E" -> "728E" [color=purple, arrowhead=none];
+	"729E" -> "730E" [color=purple, arrowhead=none];
+	"731E" -> "732E" [color=purple, arrowhead=none];
+	"741E" -> "743E" [color=purple, arrowhead=none];
+	"742E" -> "744E" [color=purple, arrowhead=none];
+	"763E" -> "764E" [color=purple, arrowhead=none];
+	"765E" -> "766E" [color=purple, arrowhead=none];
+	"770E" -> "783E" [color=purple, arrowhead=none];
+	"770E" -> "784E" [color=purple, arrowhead=none];
+	"769E" -> "785E" [color=purple, arrowhead=none];
+	"769E" -> "786E" [color=purple, arrowhead=none];
+	"769E" -> "787E" [color=purple, arrowhead=none];
+	"770E" -> "788E" [color=purple, arrowhead=none];
+	"770E" -> "789E" [color=purple, arrowhead=none];
+	"769E" -> "790E" [color=purple, arrowhead=none];
+	"770E" -> "791E" [color=purple, arrowhead=none];
+	"769E" -> "792E" [color=purple, arrowhead=none];
+	"793E" -> "769E" [color=purple, arrowhead=none];
+	"769E" -> "784E" [color=purple, arrowhead=none];
+	"770E" -> "785E" [color=purple, arrowhead=none];
+	"788E" -> "787E" [color=purple, arrowhead=none];
+	"770E" -> "792E" [color=purple, arrowhead=none];
+	"798E" -> "799E" [color=purple, arrowhead=none];
+	"796E" -> "797E" [color=purple, arrowhead=none];
+	"793E" -> "789E" [color=purple, arrowhead=none];
+	"783E" -> "787E" [color=purple, arrowhead=none];
+	"784E" -> "792E" [color=purple, arrowhead=none];
+	"787E" -> "789E" [color=purple, arrowhead=none];
+	"769E" -> "791E" [color=purple, arrowhead=none];
+	"802E" -> "801E" [color=purple, arrowhead=none];
+}
diff --git a/src/graphxq/samples/unix.gv b/src/graphxq/samples/unix.gv
new file mode 100644
index 0000000..48e455f
--- /dev/null
+++ b/src/graphxq/samples/unix.gv
@@ -0,0 +1,55 @@
+/* courtesy Ian Darwin and Geoff Collyer, Softquad Inc. */
+digraph unix {
+    size="6,6";
+    node [color=lightblue2, style=filled];
+    "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";
+}
+