diff --git a/source/Ox/js/Constants.js b/source/Ox/js/Constants.js
index 2818c6ad..b2edf35b 100644
--- a/source/Ox/js/Constants.js
+++ b/source/Ox/js/Constants.js
@@ -53,6 +53,25 @@ Ox.KEYS = {
     220: 'backslash', 221: 'closebracket', 222: 'quote', 224: 'meta'
     // see dojo, for ex.
 },
+//@ Ox.KEYWORDS <[s]> JavaScript keywords
+// see https://developer.mozilla.org/en/JavaScript/Reference
+Ox.KEYWORDS = [
+    'break',
+    'case', 'catch', 'class', 'const', 'continue',
+    'debugger', 'default', 'delete', 'do',
+    'else', 'enum', 'export', 'extends',
+    'false', 'finally', 'for', 'function',
+    'if', 'implements', 'import', 'in', 'instanceof', 'interface',
+    'let', 'module',
+    'new', 'null',
+    'package', 'private', 'protected', 'public',
+    'return',
+    'super', 'switch', 'static',
+    'this', 'throw', 'true', 'try', 'typeof',
+    'var', 'void',
+    'yield',
+    'while', 'with'
+];
 Ox.MAP_TILE_SIZE = 256; // fixme: definitely not needed here
 //@ Ox.MAX_LATITUDE <n> Maximum latitude of a Mercator projection
 Ox.MAX_LATITUDE = Ox.deg(Math.atan(Ox.sinh(Math.PI)));