Riverside County and San Bernardino County to the north form this metro area. Like many such metro areas in the Southwest, it extends far into uninhabited desert areas, in this case east through the Mojave Desert to the Nevada/Arizona border. Larger than nine U.S. states, it is often referred to as the Inland Empire.
I agree with tchrist that the word doctor in doctor appointment is a noun (attributive noun I believe), although the definition of an attributive noun is a noun used as an adjective, so maybe it's just semantics at some point.
Purpose and Use of Acting Versus Interim Appointments. Acting Appointment. An ACTING appointment is defined as a position filled on a temporary basis to replace a regular unclassified employee on leave. The expectation is that the regular employee will be returning to his/her regular position in the future.