diff --git a/lib/corereqs.js b/lib/corereqs.js
index ea6e0d7..43bd5b0 100644
--- a/lib/corereqs.js
+++ b/lib/corereqs.js
@@ -1,3 +1,6 @@
+// full list of event/error/request codes for all extensions:
+// http://www.opensource.apple.com/source/X11server/X11server-106.7/kdrive/xorg-server-1.6.5-apple3/dix/protocol.txt
+
 var xutil = require('./xutil');
 var hexy = require('./hexy').hexy;
 
@@ -301,7 +304,7 @@ module.exports = {
             return [format, [12, n, win, mask].concat(params)];
         }
    ],
-   
+
    ResizeWindow: [
         function(win, width, height) {
             return module.exports.ConfigureWindow[0](win, { width : width, height: height });
@@ -516,7 +519,7 @@ module.exports = {
        function(buf, status) {
            return status;
        }
-   ],  
+   ],
 
    UngrabKeyboard: [
        function(time) {
@@ -527,7 +530,7 @@ module.exports = {
    GrabKey: [
        function(wid, ownerEvents, modifiers, key, pointerMode, keybMode) {
            return [ 'CCSLSCCCxxx', [ 33, ownerEvents, 4, wid, modifiers, key, pointerMode, keybMode ] ];
-       }	
+       }
    ],
 
    UngrabKey: [
@@ -535,7 +538,7 @@ module.exports = {
            return [ 'CCSLSxx', [ 34, key, 3, wid, modifiers ] ];
        }
    ],
-   
+
    GrabServer: [
        [ 'CxS', [36, 1]]
    ],
@@ -560,7 +563,7 @@ module.exports = {
            };
        }
    ],
-   
+
    TranslateCoordinates: [
        function(srcWid, dstWid, srcX, srcY) {
            return [ 'CxSLLSS', [ 40, 4, srcWid, dstWid, srcX, srcY ] ];
@@ -584,7 +587,7 @@ module.exports = {
           return [ 'CCSLL', [42, revertTo, 3, wid, 0] ];
       }
    ],
-   
+
    GetInputFocus: [
        function() {
            return [ 'CxS', [ 43, 1 ] ];