This is what we use...
A0.0, A0.1, .... Title Sheet and Information
DA1.1, DA1.2, .... Removal Plans
A1.01, A1.02, ... Overall Plans
A1.1R, A1.2R, .... Roof Plans
A2.01, A2.02, ... Reflected Ceilings
A3.01, A3.02, ... Exterior Elevations
A4.0 Door Elevations & Details
A4.1 Window Elevations & Details
A5.01, A5.02, ... Building Sections
A6.01, A6.02, ... Wall Sections
A7.01, A7.02, ... Misc Details
Enlarged Plans and Interior Elevations either in the A1.# series or the A4.# series.
Millwork plans elevations & details will fall either in the A4.# or A7.#.
Jury is out on their location pending the Architect that I am working with at the time ( and it bugs me :realmad:)
But hey each architect has their own title block.