diff --git a/doc/lexer.dot b/doc/lexer.dot
index e15307a..f571e2e 100644
--- a/doc/lexer.dot
+++ b/doc/lexer.dot
@@ -1,7 +1,6 @@
 digraph lexer {
     rankdir=LR;
-    node [shape = doublecircle] LP RP B0 BF DP1 DD0 DD1 DD2 DR0 DR1 INF NAN EXD IMG;
-    node [shape = octagon, ratio=1] NRAT DDAT;
+    node [shape = doublecircle] LP RP B0 BF DP1 DD0 DD1 DD2 DR0 DR1 INF NAN EXD;
     node [shape = circle];
     BEGIN -> LP  [ label = "(" ];
     BEGIN -> RP  [ label = ")" ];
@@ -31,7 +30,7 @@ digraph lexer {
      
     subgraph numbers {
         BEGIN -> DD0 [ label = "0-9" ];
-        BEGIN -> SN2 [ label = "+,-" ];
+        BEGIN -> SN0 [ label = "+,-" ];
         BEGIN -> DP0 [ label = "." ];
         DD0 -> DD0 [ label = "0-9" ];
         DD0 -> DP1 [ label = "." ];
@@ -91,21 +90,5 @@ digraph lexer {
         DD0 -> FR1 [ label = "/" ];
         FR1 -> DD2 [ label = "0-9" ];
         DD2 -> DD2 [ label = "0-9" ];
-
-        SN2 -> IMG [ label = "i" ];
-        INF -> IMG [ label = "i" ];
-        NAN -> IMG [ label = "i" ];
-        DD0 -> IMG [ label = "i" ];
-
-        DR0 -> NRAT [ label = "@" ];
-        DR1 -> NRAT [ label = "" ];
-        NRAT -> DR0 [ label = "Dr" ];
-
-        DD0 -> DDAT [ label = "@" ];
-        DD2 -> DDAT [ label = "@" ];
-        DP1 -> DDAT [ label = "@" ];
-        DD1 -> DDAT [ label = "@" ];
-        EXD -> DDAT [ label = "@" ];
-        DDAT -> SN0 [ label = "+,-" ];
     }
 }