Documentation: related to
@@ -72,7 +72,7 @@ echo " - print \"string to print also with key values like in the file name\""
echo " - transient keyname1 = keyname2;"
echo " - comments beginning with #"
echo " - defined(keyname) to check if a key is defined in a message"
-echo " - missing(keyname) to check if the value of the key is set to MISSING"
+echo " - missing(keyname) to check if the value of the key is set to MISSING (Note: This does not apply to codetable keys)"
echo " - To set a key value to MISSING, use 'set key=MISSING;' (note the case)"
echo " - You can also make an assertion with 'assert(condition)'. If condition is false, it will abort the filter."
echo " ."
