Hi,
Thanks for your question. This is something that we have in our long term roadmap. As interim solution - can you create a dummy attribute and put the logic in integration layer to populate the value in this dummy attribute. The dummy attribute can then be used in label formation
You can vote the idea here - https://reltio.aha.io/ideas/ideas/MDM-I-771 ( Please ask customer to vote too if they are not already there)
Higher number of votes will help us prioritize.
------------------------------
Abhradeep Sengupta
------------------------------