Hi There,
Like OpcMap.opcm, in this file the OPC Tag Name could be created and link to the varialbe in program. e.g. create a new tag as NewOpcTag and link to Test.ItemIndex, in OPC client, the variable NewOpcTag then could be used(instead of using Test.ItemIndex).
is it also possible to modify the OPC-UA mapping table ?
I’m not sure if I understand your question, so I will try to answer generally:
a) The default OPCUA configuration file is generated automatically by AS, so you cannot change the linking or rename a node. You can only enable/disable it and configure its behavior.
b) You can create your own namespace using a nodeset file, which gives you more freedom. For example, you can link a node with a variable. I’m not sure if this is what you’re looking for, but to do it properly, you need OPCUA knowledge. Something is described here: https://help.br-automation.com/#/en/4/communication%2Fopcua%2Fdefaultview%2Fopcua_uanodesetadd.html, but it is more about how to create a nodeset file in AS, and there is no detailed description of OPCUA knowledge.
Hope it helps.
Jaroslav 
Finally, I found a solution for this case:
Action by moderator: I removed the link to the PDF. Based on the information, you solved it by linking the node to PV in your namespace, so option B from my description. Feel free to correct me if I’m wrong 