As the case for now defunct Power 104.1, and all the other stations that play slow jams without hearing hip hop on the radio, Urban Contemporary is defined as music from the following genres:
Blues
Soul
Dance
Gospel
Reggae
Rap
Jazz
So with that in mind a Urban Adult Contemporary station would using have Gospel programming Sunday Mornings, Jazz in the afternoon on Sundays. Plus have a Blues show on Saturday, like now defunct KSJL-FM San Antonio, Texas.
and for the weekdays would mix your Dance, and Soul music maybe a hint of Reggae.
Urban Contemporary stations would be a blend of Dance, Soul, Rap, Reggae, and Blues.
Rythmic Contemporary Hits would be a mixture of Dance Crossovers, Hip Hop, and R&B.
The old digital music express from Paragon Cable had Urban Channels.
One being Soul, Dance, Reggae, Rap, and Jazz those were the Urban Channels in the DMX lineup.