themwasthe days
Your definition of a CDA seems fine to me, but as has already been mentioned, CDAs mean different things to different people depending upon their location and equipment. So does your definition get across what you want it to?
For example at Heathrow the plates tell us (forgive me if I am teaching the proverbial grandmother to suck eggs!) "... a descent will be deemed to be continuous provided that no segment of flight longer than 2.5nm occurs below 6000' and level flight is interpreted as any segment of flight having a height change of not more than 50ft over a track distance of 2nm or more."
As definitions go, this one is much more prescriptive than the one you gave, but then I don't know if this is actually what you want to achieve as you are bringing STARS into the equation. With reference to Heathrow, CDAs start long after the STAR has finished but most pilots I know attempt to fly a continuous descent from cruise to touchdown. Perverse isn't it!?
G W-H