Date is Incomplete - database application software and database theory

My reading of Date allows me to assert his detailed coverage of the theoretical ground of database systems technology lacks any meaningful discussion of the (one would implicity assume exists) application system software which is to "inhabit" the system.

This is radical incompleteness of theory.

Are there any parties aware of any other authors who allow for the theoretical treatment of the interrelationships  between RDBMS software and the
generic application system software level?

-- 
Pete Brown
Winluck P/L
IT Managers & Engineers
Falls Creek
Australia
www.mountainman.com.au/software