Thus proving my german really is ****e I didn't quite get what you were on about.
Can I recommend a book called Performance by Swatton. It really is the bible for performance theory and definitions.
No you are quite correct you can't just invent your own steep approaches with no guidance.
Read Swatton it's the sort of book which stays with you the whole of your career.
http://www.amazon.de/Aircraft-Perfor.../dp/0632055693