How to read container variable in UDF

Hello expert,
I have created a container variable(var_callerId) in an integrationprocess.
In a mapping I want to read the container variable with an UDF.
Can anyone send me the code for the UDF please ?
I can't find the solution in any post message / blog.
Thx for your help!
Best regards,
Juergen

Hi navneet,
thanks for your fast reply.
Let me explain why I wanted to use container variables:
(Perhaps there is a better way to fix the requirement)
I've following IP
Message Interface (input)
<getData>
<callerInfo>
<callerID>SYSA</callerID>
<SessionID>43545455545355</SessionID>
<number>3434344334</number>
</callerInfo>
</getData>
Then I have a mapping (<number>) to call a webservice.
I get the data from the webservice.
At last I will send the data back to the business System.
But I need the both tags from the input interface (SessionID, callerID) again, to send it back.
I tried a mapping to map sessionID and callerID from the input interface to the output interface, but it doesn't work.
So I thought I can store the sessionID and callerID in a container variable and in a mapping I will get it back with an UDF.
I think there should be a possiblility to get the stored value from the container variable inside the IP. But I don't find any solution.
I don't understand your solution with the global container. How can I access to the container variable(IP).
Thx for your help
Best regards
Juergen

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