I expect talend to encode it to "?"
Ok, yes, that makes more sense. Talend has no built in way to do this. Best thing would be to set up a new routine and use this (not tested by me):
Talend named a Leader.
Kickstart your first data integration and ETL projects.
Watch the recorded webinar!
Pick up some tips and tricks with Context Variables
Learn how media organizations have achieved success with Data Integration
Look at6 ways to start utilizing Machine Learning with Amazon We Services and Talend