diff --git a/ballerina/constants.bal b/ballerina/constants.bal
index 1142b66..d134b45 100644
--- a/ballerina/constants.bal
+++ b/ballerina/constants.bal
@@ -125,23 +125,42 @@ public const int ENC_FLOAT_IEEE_REVERSED = 512;
 # Floating-point numbers are represented using the standard zSeries (System/390) floating-point format.
 public const int ENC_FLOAT_S390 = 768;
 
-# Character data in the message is in the queue manager's character set.
-public const int CCSI_Q_MGR = 0;
+# Coded Character Set Identifiers - Appl.
+public const int  CCSI_APPL = -3;
+
+# ASCII codeset
+public const int CCSI_ASCII = 850;
+
+# ISO standard ASCII codeset 
+public const int CCSI_ASCII_ISO = 819;
+
+# Coded Character Set Identifiers - As Published.
+public const int CCSI_AS_PUBLISHED = -4;
 
-# ASCII character set
-public const int CHARSET_ASCII = 850;
+# The CodedCharSetId of the data in the String field is defined by the CodedCharSetId field in the header structure 
+# that precedes the MQCFH structure, or by the CodedCharSetId field in the MQMD if the MQCFH is at the start of the message.
+public const int CCSI_DEFAULT = 0;
 
-# ISO standard ASCII character set 
-public const int CHARSET_ASCII_ISO = 819;
+# The American EBCDIC codeset  
+public const int CCSI_EBCDIC = 37;
+
+# Coded Character Set Identifiers - Embedded.
+public const int CCSI_EMBEDDED = -1;
+
+# Character data in the message is in the same character set as this structure.
+public const int CCSI_INHERIT = -2;
+
+# Character data in the message is in the queue manager's character set.
+public const int CCSI_Q_MGR = 0;
 
-# The American EBCDIC character set  
-public const int CHARSET_EBCDIC = 37;
+# Coded Character Set Identifiers - Undefined.
+public const int CCSI_UNDEFINED = 0;
 
-# Unicode character set
-public const int CHARSET_UNICODE = 1200;
+# Unicode codeset
+public const int CCSI_UNICODE = 1200;
 
-# UTF-8 character set
-public const int CHARSET_UTF8 = 1208;
+# UTF-8 codeset
+public const int CCSI_UTF8 = 1208;
 
 const string DEFAULT_BLANK_VALUE = "        ";
 
diff --git a/ballerina/types.bal b/ballerina/types.bal
index e14c4f5..a1ef694 100644
--- a/ballerina/types.bal
+++ b/ballerina/types.bal
@@ -23,7 +23,8 @@ public type OPEN_TOPIC_OPTION OPEN_AS_SUBSCRIPTION|OPEN_AS_PUBLICATION;
 public type Header MQRFH2|MQRFH|MQCIH|MQIIH;
 
 # The coded character set used in application message data.
-public type MESSAGE_CHARSET CCSI_Q_MGR|CHARSET_ASCII|CHARSET_ASCII_ISO|CHARSET_EBCDIC|CHARSET_UNICODE|CHARSET_UTF8;
+public type MESSAGE_CHARSET CCSI_APPL|CCSI_ASCII|CCSI_ASCII_ISO|CCSI_AS_PUBLISHED|CCSI_DEFAULT|
+    CCSI_EBCDIC|CCSI_EMBEDDED|CCSI_INHERIT|CCSI_Q_MGR|CCSI_UNDEFINED|CCSI_UNICODE|CCSI_UTF8;
 
 # The SSL Cipher Suite to be used for secure communication with the IBM MQ server.
 public type SslCipherSuite SSL_ECDHE_ECDSA_WITH_3DES_EDE_CBC_SHA|SSL_ECDHE_ECDSA_WITH_AES_128_CBC_SHA256