diff --git a/Transformation/ContextFunctions.cs b/Transformation/ContextFunctions.cs
index e2aa770..9920d43 100644
--- a/Transformation/ContextFunctions.cs
+++ b/Transformation/ContextFunctions.cs
@@ -12,10 +12,20 @@ namespace XNeedle.Transformation
 {
     public class ContextFunctions
     {
-        public static string hex(Context ctx, double value)
+        public static string hexlit(Context ctx, double value)
         {
             uint v = (uint)value;
-            return $"#x{v:X8}";
+            return $"#x{v:x8}";
+        }
+
+        public static string lower(Context ctx, string text)
+        {
+            return text.ToLower();
+        }
+
+        public static string upper(Context ctx, string text)
+        {
+            return text.ToUpper();
         }
 
         public static double GetLevel(Context ctx)