Reliance Industries Ltd (RIL) has started the process to set up an infrastructure investment trust (InvIT), under which the group can monetise the backend warehousing and logistics assets of its retail business, said industry sources. Reliance Retail, the company which operates the retail business of the billionaire Mukesh Ambani-led Reliance Industries, has already registered a trust with the market regulator Securities and Exchange Board of India (Sebi) in February this year, they added.