How can I fetch the original column header case in the CSV output of a BI report without underscore

By default, the CSV output from BI Publisher modifies the column headers by replacing spaces with underscores and converting them to uppercase. I would like the CSV output to retain the original column header formatting exactly as defined in the Data Model (e.g., "Employee Name" instead of "EMPLOYEE_NAME").

As it is fetching from the XML tags itself, how can I fetch the display name that is defined as Employee Name ?