Richard M. Daley celebrated his 47th birthday Monday by being inaugurated mayor, a position he intends to occupy in a vastly different fashion than the way his father did for 21 years.

Daley campaigned on a promise to operate a more open government in the nation's third-largest city than did his father, who in his tenure as the city's top executive ran a political machine powered by a Democratic patronage army.Yet the younger Daley's pride in his heritage is clear. He even arranged to receive the oath of office from Senior U.S. District Judge Abraham Lincoln Marovitz, who performed the same service for the late Richard J. Daley six times.