diff --git a/src/liberator/graph.clj b/src/liberator/graph.clj
index 3f7f233..f44ac19 100644
--- a/src/liberator/graph.clj
+++ b/src/liberator/graph.clj
@@ -1,4 +1,5 @@
-(ns liberator.graph)
+(ns liberator.graph
+  (:require [liberator.core :as liberator]))
 
 (defn extract
   ([_ name then else] [name then else])
@@ -7,16 +8,21 @@
 (defn clean-id [str]
   (clojure.string/replace str #"[^a-zA-Z0-9_]+" ""))
 
+(def default-style "color=\"#b2df8a\"")
+
 (defn to-graph [[& args]]
   (condp = (first args)
     'defdecision
-    (let [[name then else] (apply extract args)]
+    (let [[name then else] (apply extract args)
+          default (get liberator/default-functions (keyword name))
+          then-default (if (true? default) default-style "")
+          else-default (if (false? default) default-style "")]
       (format (str "\"%s\" [id = \"%s\"] \n "
-                   "\"%s\" -> \"%s\" [label = \"true\",  id = \"%s\"] \n"
-                   "\"%s\" -> \"%s\" [label = \"false\", id = \"%s\"]\n")
+                   "\"%s\" -> \"%s\" [label = \"true\",  id = \"%s\" %s] \n"
+                   "\"%s\" -> \"%s\" [label = \"false\", id = \"%s\" %s]\n")
               name (clean-id name)
-              name then (clean-id (str name "_" then))
-              name else (clean-id (str name "_" else))))
+              name then (clean-id (str name "_" then)) then-default
+              name else (clean-id (str name "_" else)) else-default))
     'defaction
     (let [[_ name then] args]
       (format (str "\"%s\"[shape=\"ellipse\" id = \"%s\"];\n"
diff --git a/src/liberator/trace.svg b/src/liberator/trace.svg
index 31562dc..8c4a56f 100644
--- a/src/liberator/trace.svg
+++ b/src/liberator/trace.svg
@@ -286,8 +286,8 @@
 <!-- multiple&#45;representations?&#45;&gt;handle&#45;ok -->
 <g id="multiplerepresentations_handleok" class="edge">
 <title>multiple&#45;representations?&#45;&gt;handle&#45;ok</title>
-<path fill="none" stroke="#000000" d="M531.7985,-85.7616C543.683,-73.4475 559.534,-57.0235 572.6541,-43.4293"/>
-<polygon fill="#000000" stroke="#000000" points="575.1934,-45.8382 579.6195,-36.2121 570.1566,-40.977 575.1934,-45.8382"/>
+<path fill="none" stroke="#b2df8a" d="M531.7985,-85.7616C543.683,-73.4475 559.534,-57.0235 572.6541,-43.4293"/>
+<polygon fill="#b2df8a" stroke="#b2df8a" points="575.1934,-45.8382 579.6195,-36.2121 570.1566,-40.977 575.1934,-45.8382"/>
 <text text-anchor="middle" x="575.9824" y="-56.8" font-family="sans-serif" font-size="14.00" fill="#000000">false</text>
 </g>
 <!-- respond&#45;with&#45;entity? -->
@@ -299,8 +299,8 @@
 <!-- respond&#45;with&#45;entity?&#45;&gt;handle&#45;no&#45;content -->
 <g id="respondwithentity_handlenocontent" class="edge">
 <title>respond&#45;with&#45;entity?&#45;&gt;handle&#45;no&#45;content</title>
-<path fill="none" stroke="#000000" d="M749.2501,-171.9181C747.6837,-141.981 744.5397,-81.8972 742.677,-46.2989"/>
-<polygon fill="#000000" stroke="#000000" points="746.1611,-45.9012 742.1433,-36.0977 739.1707,-46.267 746.1611,-45.9012"/>
+<path fill="none" stroke="#b2df8a" d="M749.2501,-171.9181C747.6837,-141.981 744.5397,-81.8972 742.677,-46.2989"/>
+<polygon fill="#b2df8a" stroke="#b2df8a" points="746.1611,-45.9012 742.1433,-36.0977 739.1707,-46.267 746.1611,-45.9012"/>
 <text text-anchor="middle" x="761.9824" y="-99.8" font-family="sans-serif" font-size="14.00" fill="#000000">false</text>
 </g>
 <!-- respond&#45;with&#45;entity?&#45;&gt;multiple&#45;representations? -->
@@ -319,8 +319,8 @@
 <!-- new?&#45;&gt;handle&#45;created -->
 <g id="new_handlecreated" class="edge">
 <title>new?&#45;&gt;handle&#45;created</title>
-<path fill="none" stroke="#000000" d="M938.0009,-257.8579C935.0807,-213.5401 927.5673,-99.5129 924.0562,-46.2275"/>
-<polygon fill="#000000" stroke="#000000" points="927.5404,-45.8702 923.3904,-36.122 920.5555,-46.3305 927.5404,-45.8702"/>
+<path fill="none" stroke="#b2df8a" d="M938.0009,-257.8579C935.0807,-213.5401 927.5673,-99.5129 924.0562,-46.2275"/>
+<polygon fill="#b2df8a" stroke="#b2df8a" points="927.5404,-45.8702 923.3904,-36.122 920.5555,-46.3305 927.5404,-45.8702"/>
 <text text-anchor="middle" x="943.2583" y="-142.8" font-family="sans-serif" font-size="14.00" fill="#000000">true</text>
 </g>
 <!-- new?&#45;&gt;respond&#45;with&#45;entity? -->
@@ -346,8 +346,8 @@
 <!-- post&#45;redirect?&#45;&gt;new? -->
 <g id="postredirect_new" class="edge">
 <title>post&#45;redirect?&#45;&gt;new?</title>
-<path fill="none" stroke="#000000" d="M958.8944,-343.7616C955.5468,-332.2456 951.1542,-317.1353 947.3667,-304.1064"/>
-<polygon fill="#000000" stroke="#000000" points="950.6429,-302.8376 944.4905,-294.2121 943.9211,-304.7916 950.6429,-302.8376"/>
+<path fill="none" stroke="#b2df8a" d="M958.8944,-343.7616C955.5468,-332.2456 951.1542,-317.1353 947.3667,-304.1064"/>
+<polygon fill="#b2df8a" stroke="#b2df8a" points="950.6429,-302.8376 944.4905,-294.2121 943.9211,-304.7916 950.6429,-302.8376"/>
 <text text-anchor="middle" x="967.9824" y="-314.8" font-family="sans-serif" font-size="14.00" fill="#000000">false</text>
 </g>
 <!-- post&#45;enacted?&#45;&gt;handle&#45;accepted -->
@@ -360,8 +360,8 @@
 <!-- post&#45;enacted?&#45;&gt;post&#45;redirect? -->
 <g id="postenacted_postredirect" class="edge">
 <title>post&#45;enacted?&#45;&gt;post&#45;redirect?</title>
-<path fill="none" stroke="#000000" d="M913.769,-429.7616C922.6785,-417.7896 934.4788,-401.9328 944.4244,-388.5685"/>
-<polygon fill="#000000" stroke="#000000" points="947.4808,-390.324 950.6431,-380.2121 941.8651,-386.1449 947.4808,-390.324"/>
+<path fill="none" stroke="#b2df8a" d="M913.769,-429.7616C922.6785,-417.7896 934.4788,-401.9328 944.4244,-388.5685"/>
+<polygon fill="#b2df8a" stroke="#b2df8a" points="947.4808,-390.324 950.6431,-380.2121 941.8651,-386.1449 947.4808,-390.324"/>
 <text text-anchor="middle" x="948.2583" y="-400.8" font-family="sans-serif" font-size="14.00" fill="#000000">true</text>
 </g>
 <!-- put&#45;enacted?&#45;&gt;handle&#45;accepted -->
@@ -374,8 +374,8 @@
 <!-- put&#45;enacted?&#45;&gt;new? -->
 <g id="putenacted_new" class="edge">
 <title>put&#45;enacted?&#45;&gt;new?</title>
-<path fill="none" stroke="#000000" d="M771.6384,-343.9716C810.3712,-328.2592 865.8852,-305.7394 902.2326,-290.9947"/>
-<polygon fill="#000000" stroke="#000000" points="903.9954,-294.0567 911.9463,-287.0543 901.364,-287.5701 903.9954,-294.0567"/>
+<path fill="none" stroke="#b2df8a" d="M771.6384,-343.9716C810.3712,-328.2592 865.8852,-305.7394 902.2326,-290.9947"/>
+<polygon fill="#b2df8a" stroke="#b2df8a" points="903.9954,-294.0567 911.9463,-287.0543 901.364,-287.5701 903.9954,-294.0567"/>
 <text text-anchor="middle" x="858.2583" y="-314.8" font-family="sans-serif" font-size="14.00" fill="#000000">true</text>
 </g>
 <!-- can&#45;post&#45;to&#45;missing? -->
@@ -387,8 +387,8 @@
 <!-- can&#45;post&#45;to&#45;missing?&#45;&gt;post! -->
 <g id="canposttomissing_post" class="edge">
 <title>can&#45;post&#45;to&#45;missing?&#45;&gt;post!</title>
-<path fill="none" stroke="#000000" d="M1242.0376,-687.9181C1166.2956,-653.8144 1003.6656,-580.5883 933.5222,-549.0054"/>
-<polygon fill="#000000" stroke="#000000" points="934.8125,-545.748 924.2572,-544.8337 931.9385,-552.1308 934.8125,-545.748"/>
+<path fill="none" stroke="#b2df8a" d="M1242.0376,-687.9181C1166.2956,-653.8144 1003.6656,-580.5883 933.5222,-549.0054"/>
+<polygon fill="#b2df8a" stroke="#b2df8a" points="934.8125,-545.748 924.2572,-544.8337 931.9385,-552.1308 934.8125,-545.748"/>
 <text text-anchor="middle" x="1140.2583" y="-615.8" font-family="sans-serif" font-size="14.00" fill="#000000">true</text>
 </g>
 <!-- can&#45;post&#45;to&#45;missing?&#45;&gt;handle&#45;not&#45;found -->
@@ -474,8 +474,8 @@
 <!-- moved&#45;temporarily?&#45;&gt;post&#45;to&#45;gone? -->
 <g id="movedtemporarily_posttogone" class="edge">
 <title>moved&#45;temporarily?&#45;&gt;post&#45;to&#45;gone?</title>
-<path fill="none" stroke="#000000" d="M1069.9271,-859.9716C1053.4987,-847.2433 1031.3045,-830.0478 1013.35,-816.1371"/>
-<polygon fill="#000000" stroke="#000000" points="1015.4836,-813.3626 1005.4349,-810.0047 1011.1963,-818.8961 1015.4836,-813.3626"/>
+<path fill="none" stroke="#b2df8a" d="M1069.9271,-859.9716C1053.4987,-847.2433 1031.3045,-830.0478 1013.35,-816.1371"/>
+<polygon fill="#b2df8a" stroke="#b2df8a" points="1015.4836,-813.3626 1005.4349,-810.0047 1011.1963,-818.8961 1015.4836,-813.3626"/>
 <text text-anchor="middle" x="1059.9824" y="-830.8" font-family="sans-serif" font-size="14.00" fill="#000000">false</text>
 </g>
 <!-- moved&#45;permanently? -->
@@ -494,8 +494,8 @@
 <!-- moved&#45;permanently?&#45;&gt;moved&#45;temporarily? -->
 <g id="movedpermanently_movedtemporarily" class="edge">
 <title>moved&#45;permanently?&#45;&gt;moved&#45;temporarily?</title>
-<path fill="none" stroke="#000000" d="M1132.5926,-945.7616C1125.6984,-933.9036 1116.5884,-918.2345 1108.8655,-904.951"/>
-<polygon fill="#000000" stroke="#000000" points="1111.8368,-903.098 1103.7847,-896.2121 1105.7852,-906.6164 1111.8368,-903.098"/>
+<path fill="none" stroke="#b2df8a" d="M1132.5926,-945.7616C1125.6984,-933.9036 1116.5884,-918.2345 1108.8655,-904.951"/>
+<polygon fill="#b2df8a" stroke="#b2df8a" points="1111.8368,-903.098 1103.7847,-896.2121 1105.7852,-906.6164 1111.8368,-903.098"/>
 <text text-anchor="middle" x="1134.9824" y="-916.8" font-family="sans-serif" font-size="14.00" fill="#000000">false</text>
 </g>
 <!-- existed? -->
@@ -507,8 +507,8 @@
 <!-- existed?&#45;&gt;post&#45;to&#45;missing? -->
 <g id="existed_posttomissing" class="edge">
 <title>existed?&#45;&gt;post&#45;to&#45;missing?</title>
-<path fill="none" stroke="#000000" d="M1173.5918,-1031.742C1191.2925,-1019.6676 1212.7105,-1002.3381 1226.1963,-982 1259.8964,-931.1764 1273.7789,-859.5975 1279.1288,-820.4031"/>
-<polygon fill="#000000" stroke="#000000" points="1282.6302,-820.6131 1280.4208,-810.2512 1275.6862,-819.7293 1282.6302,-820.6131"/>
+<path fill="none" stroke="#b2df8a" d="M1173.5918,-1031.742C1191.2925,-1019.6676 1212.7105,-1002.3381 1226.1963,-982 1259.8964,-931.1764 1273.7789,-859.5975 1279.1288,-820.4031"/>
+<polygon fill="#b2df8a" stroke="#b2df8a" points="1282.6302,-820.6131 1280.4208,-810.2512 1275.6862,-819.7293 1282.6302,-820.6131"/>
 <text text-anchor="middle" x="1271.9824" y="-916.8" font-family="sans-serif" font-size="14.00" fill="#000000">false</text>
 </g>
 <!-- existed?&#45;&gt;moved&#45;permanently? -->
@@ -528,8 +528,8 @@
 <!-- patch&#45;enacted?&#45;&gt;respond&#45;with&#45;entity? -->
 <g id="patchenacted_respondwithentity" class="edge">
 <title>patch&#45;enacted?&#45;&gt;respond&#45;with&#45;entity?</title>
-<path fill="none" stroke="#000000" d="M780.0168,-257.8969C774.9216,-252.5342 769.8357,-246.3785 766.0723,-240 762.1268,-233.313 759.0485,-225.5349 756.6973,-218.134"/>
-<polygon fill="#000000" stroke="#000000" points="760.0342,-217.0723 753.9288,-208.4135 753.3019,-218.9897 760.0342,-217.0723"/>
+<path fill="none" stroke="#b2df8a" d="M780.0168,-257.8969C774.9216,-252.5342 769.8357,-246.3785 766.0723,-240 762.1268,-233.313 759.0485,-225.5349 756.6973,-218.134"/>
+<polygon fill="#b2df8a" stroke="#b2df8a" points="760.0342,-217.0723 753.9288,-208.4135 753.3019,-218.9897 760.0342,-217.0723"/>
 <text text-anchor="middle" x="778.2583" y="-228.8" font-family="sans-serif" font-size="14.00" fill="#000000">true</text>
 </g>
 <!-- method&#45;post? -->
@@ -568,8 +568,8 @@
 <!-- conflict?&#45;&gt;method&#45;post? -->
 <g id="conflict_methodpost" class="edge">
 <title>conflict?&#45;&gt;method&#45;post?</title>
-<path fill="none" stroke="#000000" d="M723.2567,-687.7616C723.9196,-676.3597 724.7873,-661.4342 725.5397,-648.494"/>
-<polygon fill="#000000" stroke="#000000" points="729.051,-648.3984 726.1374,-638.2121 722.0628,-647.9921 729.051,-648.3984"/>
+<path fill="none" stroke="#b2df8a" d="M723.2567,-687.7616C723.9196,-676.3597 724.7873,-661.4342 725.5397,-648.494"/>
+<polygon fill="#b2df8a" stroke="#b2df8a" points="729.051,-648.3984 726.1374,-638.2121 722.0628,-647.9921 729.051,-648.3984"/>
 <text text-anchor="middle" x="739.9824" y="-658.8" font-family="sans-serif" font-size="14.00" fill="#000000">false</text>
 </g>
 <!-- can&#45;put&#45;to&#45;missing? -->
@@ -588,8 +588,8 @@
 <!-- can&#45;put&#45;to&#45;missing?&#45;&gt;conflict? -->
 <g id="canputtomissing_conflict" class="edge">
 <title>can&#45;put&#45;to&#45;missing?&#45;&gt;conflict?</title>
-<path fill="none" stroke="#000000" d="M879.7688,-945.8189C866.8412,-932.5969 849.5507,-913.942 836.1963,-896 795.3307,-841.0958 756.2029,-770.7326 736.1368,-732.9192"/>
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+<path fill="none" stroke="#b2df8a" d="M879.7688,-945.8189C866.8412,-932.5969 849.5507,-913.942 836.1963,-896 795.3307,-841.0958 756.2029,-770.7326 736.1368,-732.9192"/>
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 <text text-anchor="middle" x="812.2583" y="-830.8" font-family="sans-serif" font-size="14.00" fill="#000000">true</text>
 </g>
 <!-- put&#45;to&#45;different&#45;url? -->
@@ -608,8 +608,8 @@
 <!-- put&#45;to&#45;different&#45;url?&#45;&gt;can&#45;put&#45;to&#45;missing? -->
 <g id="puttodifferenturl_canputtomissing" class="edge">
 <title>put&#45;to&#45;different&#45;url?&#45;&gt;can&#45;put&#45;to&#45;missing?</title>
-<path fill="none" stroke="#000000" d="M916.3186,-1031.7616C913.2387,-1020.2456 909.1976,-1005.1353 905.7131,-992.1064"/>
-<polygon fill="#000000" stroke="#000000" points="909.0318,-990.9683 903.067,-982.2121 902.2695,-992.7769 909.0318,-990.9683"/>
+<path fill="none" stroke="#b2df8a" d="M916.3186,-1031.7616C913.2387,-1020.2456 909.1976,-1005.1353 905.7131,-992.1064"/>
+<polygon fill="#b2df8a" stroke="#b2df8a" points="909.0318,-990.9683 903.067,-982.2121 902.2695,-992.7769 909.0318,-990.9683"/>
 <text text-anchor="middle" x="925.9824" y="-1002.8" font-family="sans-serif" font-size="14.00" fill="#000000">false</text>
 </g>
 <!-- method&#45;put? -->
@@ -722,8 +722,8 @@
 <!-- delete&#45;enacted?&#45;&gt;respond&#45;with&#45;entity? -->
 <g id="deleteenacted_respondwithentity" class="edge">
 <title>delete&#45;enacted?&#45;&gt;respond&#45;with&#45;entity?</title>
-<path fill="none" stroke="#000000" d="M619.7857,-257.9716C645.0862,-244.7846 679.5865,-226.8027 706.7468,-212.6464"/>
-<polygon fill="#000000" stroke="#000000" points="708.4024,-215.7304 715.6524,-208.0047 705.1669,-209.523 708.4024,-215.7304"/>
+<path fill="none" stroke="#b2df8a" d="M619.7857,-257.9716C645.0862,-244.7846 679.5865,-226.8027 706.7468,-212.6464"/>
+<polygon fill="#b2df8a" stroke="#b2df8a" points="708.4024,-215.7304 715.6524,-208.0047 705.1669,-209.523 708.4024,-215.7304"/>
 <text text-anchor="middle" x="690.2583" y="-228.8" font-family="sans-serif" font-size="14.00" fill="#000000">true</text>
 </g>
 <!-- method&#45;patch? -->
@@ -1022,8 +1022,8 @@
 <!-- exists?&#45;&gt;if&#45;match&#45;exists? -->
 <g id="exists_ifmatchexists" class="edge">
 <title>exists?&#45;&gt;if&#45;match&#45;exists?</title>
-<path fill="none" stroke="#000000" d="M788.3763,-2181.754C739.426,-2168.2179 640.847,-2140.9581 574.4149,-2122.5878"/>
-<polygon fill="#000000" stroke="#000000" points="575.0205,-2119.124 564.4493,-2119.832 573.1548,-2125.8707 575.0205,-2119.124"/>
+<path fill="none" stroke="#b2df8a" d="M788.3763,-2181.754C739.426,-2168.2179 640.847,-2140.9581 574.4149,-2122.5878"/>
+<polygon fill="#b2df8a" stroke="#b2df8a" points="575.0205,-2119.124 564.4493,-2119.832 573.1548,-2125.8707 575.0205,-2119.124"/>
 <text text-anchor="middle" x="694.2583" y="-2142.8" font-family="sans-serif" font-size="14.00" fill="#000000">true</text>
 </g>
 <!-- processable? -->
@@ -1042,8 +1042,8 @@
 <!-- processable?&#45;&gt;exists? -->
 <g id="processable_exists" class="edge">
 <title>processable?&#45;&gt;exists?</title>
-<path fill="none" stroke="#000000" d="M1499.5264,-2270.1565C1362.7634,-2254.0667 982.593,-2209.3408 858.174,-2194.7033"/>
-<polygon fill="#000000" stroke="#000000" points="858.2997,-2191.194 847.9593,-2193.5015 857.4818,-2198.1461 858.2997,-2191.194"/>
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 <text text-anchor="middle" x="1239.2583" y="-2228.8" font-family="sans-serif" font-size="14.00" fill="#000000">true</text>
 </g>
 <!-- encoding&#45;available? -->
@@ -1242,8 +1242,8 @@
 <!-- valid&#45;entity&#45;length?&#45;&gt;is&#45;options? -->
 <g id="validentitylength_isoptions" class="edge">
 <title>valid&#45;entity&#45;length?&#45;&gt;is&#45;options?</title>
-<path fill="none" stroke="#000000" d="M1876.5559,-3117.9716C1860.7156,-3105.358 1839.3659,-3088.3573 1821.9811,-3074.5139"/>
-<polygon fill="#000000" stroke="#000000" points="1823.8099,-3071.496 1813.8068,-3068.0047 1819.4494,-3076.972 1823.8099,-3071.496"/>
+<path fill="none" stroke="#b2df8a" d="M1876.5559,-3117.9716C1860.7156,-3105.358 1839.3659,-3088.3573 1821.9811,-3074.5139"/>
+<polygon fill="#b2df8a" stroke="#b2df8a" points="1823.8099,-3071.496 1813.8068,-3068.0047 1819.4494,-3076.972 1823.8099,-3071.496"/>
 <text text-anchor="middle" x="1863.2583" y="-3088.8" font-family="sans-serif" font-size="14.00" fill="#000000">true</text>
 </g>
 <!-- known&#45;content&#45;type? -->
@@ -1262,8 +1262,8 @@
 <!-- known&#45;content&#45;type?&#45;&gt;valid&#45;entity&#45;length? -->
 <g id="knowncontenttype_validentitylength" class="edge">
 <title>known&#45;content&#45;type?&#45;&gt;valid&#45;entity&#45;length?</title>
-<path fill="none" stroke="#000000" d="M2006.6862,-3203.9716C1986.1951,-3191.014 1958.3827,-3173.4267 1936.1826,-3159.3884"/>
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