Technology Blogs by SAP
Learn how to extend and personalize SAP applications. Follow the SAP technology blog for insights into SAP BTP, ABAP, SAP Analytics Cloud, SAP HANA, and more.
Showing results for 
Search instead for 
Did you mean: 
This blog will give you details on how to link the annotations of the Odata Service created  based on CDS  with the redefined service.


Whenever you redefine a Odata service which  was created based on CDS reference, the annotations of the redefined service will not be linked with the new Odata service .

We will now see how to eliminate this problem with one configuration technique.


  1. First of  all lets have a look at how the SEGW project  which was created based on CDS .

This Odata service has annotation model linked to this service.

The highlighted one is the Annotation model created and associated with the service in         transaction /IWBEP/REG_VOCAN.

The above mapping in /IWBEP/REG_VOCAN is an automated process.

2. What will happen if there is an service assignment in transaction /IWBEP.REG_VOCAN ?

When you register the Odata  service, it will check for the entry in transaction  /IWBEP/REG_VOCAN if the service is mapped with any Vocabulary model.

If entry exists, an entry will be created in DB table Vocabulary Annotation File -/IWFND/I_MED_VAA

3. The annotation will be retrieved in WebIDE only if the entry exists in /IWFND/I_MED_VAA.


Now Let's have a look , how the  new SEGW project  in which the above service is redefined.

4.Create a SEGW project -> Redefine->Odata Service(GW).

5. Select the required entities and generate the project.

Do not register the service.

Configuration - Important step - In Back end system  where the SEGW project exists.

6.  Before registering the service,

  • Go to transaction /IWBEP/REG_VOCAN .

  • Select the annotation model of the Original Service (which you have redefined in point 1)

7. Click Add assignment – Give the service name generated (in point 1) and click “Enter”.

8. An entry will be created as below.

9. Now register the service

10. Now in WebIDE – Lets select redefined service

11. You will get the annotations of the original service - This is because of Configuration in  point 6 and point 7.


Now what could be done if you are already facing the problem for a registered Odata service ?


1. De-register the service in transaction  /IWFND/MAINT_SERVICE.

2. Perform the configuration in /IWBEP/REG_VOCAN (Point 6 & 9).

In Back end system  where the SEGW project exists.

3. Register the service again in transaction /IWFND/MAINT_SERVICE.


Road Map:

We are planning to automate this configuration steps for CDS based Odata service when redefined.

Stay tuned for updates.