diff --git a/TS-0019-Abstract_Test_Suite_&_implementation_eXtra_Information_for_Test.md b/TS-0019-Abstract_Test_Suite_&_implementation_eXtra_Information_for_Test.md
index b8c0b4bd34a8eaa616a63832a9c786d20a1ab64b..4c44d0259b8477092b33e93fc4ce38b90bff4917 100644
--- a/TS-0019-Abstract_Test_Suite_&_implementation_eXtra_Information_for_Test.md
+++ b/TS-0019-Abstract_Test_Suite_&_implementation_eXtra_Information_for_Test.md
@@ -5,30 +5,30 @@
 
 
 
-+:--------------------------------------------------------:+
-|**oneM2M**                                                |
-|**Technical**  **Specification**                          |
-+=================+========================================+
-|Document Number  |oneM2M-TS-0019-V-4.2.0                  |
-+-----------------+----------------------------------------+
-|Document Name:   |Abstract Test Suite and Implementation  |
-|                 |eXtra Information for Test              |
-+-----------------+----------------------------------------+
-|Date:            |2024 March 1                            |
-+-----------------+----------------------------------------+
-|Abstract:        |Abstract Test Suite and Implementation  |
-|                 |eXtra Information for Test consists of: |
-|                 | - Definition of the Abstract Protocol  |
-|                 |   Tester (APT)                         |
-|                 | - Definition of TTCN-3 test            |
-|                 |   architecture                         |
-|                 | - Development of TTCN-3 test suite,    |
-|                 |   e.g. naming conventions, code        |
-|                 |   documentation, test case structure.  |
-|                 | - IXIT proforma;                       |
-+-----------------+----------------------------------------+
-|Template Version:23 February 2015 (Do not modify)         |
-+----------------------------------------------------------+
++:--------------------------------------------------------------:+
+|**oneM2M**                                                      |
+|**Technical**  **Specification**                                |
++=================+==============================================+
+|Document Number  |oneM2M-TS-0019-V-4.2.0                        |
++-----------------+----------------------------------------------+
+|Document Name:   |Abstract Test Suite and Implementation        |
+|                 |eXtra Information for Test                    |
++-----------------+----------------------------------------------+
+|Date:            |2024 March 1                                  |
++-----------------+----------------------------------------------+
+|Abstract:        |Abstract Test Suite and Implementation        |
+|                 |eXtra Information for Test consists of:<br /> |
+|                 | - Definition of the Abstract Protocol        |
+|                 |   Tester (APT)<br />                         |
+|                 | - Definition of TTCN-3 test                  |
+|                 |   architecture<br />                         |
+|                 | - Development of TTCN-3 test suite,          |
+|                 |   e.g. naming conventions, code              |
+|                 |   documentation, test case structure.<br />  |
+|                 | - IXIT proforma;                             |
++-----------------+----------------------------------------------+
+|Template Version:23 February 2015 (Do not modify)               |
++----------------------------------------------------------------+
 
 
 
@@ -421,6 +421,20 @@ Two primitives are currently defined for these ports indicated:
 
 Further primitives might be defined to support other underlying networks.
 
+**Table 5.4.1-1: Mapping of TTCN-3 Primitives to oneM2M Service Primitives**<a name="table_5.4.1-1"></a>
+
++-+-+-+-+
+|TTCN-3 Primitive |oneM2M Message |Direction |IUT |
++:=:+:=:+:=:+:=:+
+| | |<=> |AE |
+|M2MRequestPrimitive |Request Primitive +-+-+
+| | |<=> |CSE |
++-+-+-+-+
+| | |<=> |AE |
+|M2MResponsePrimitive |Respomse Primitive +-+-+
+| | |<=> |CSE |
++-+-+-+-+
+