It is being projected as the biggest administrative exercise in the world. Two million enumerators under 400,000 supervisors will go on a house-to-house, hut-to-hut campaign throughout this vast nation, collecting information on matters ranging from religion and language to food habits and other personal details from nearly a billion Indians.This is the decennial Indian census, defined as a "metadata on almost all Indian data." The 14th census, which is scheduled to be conducted over three weeks in March 2001, is expected to cost up to Rs 7 billion.