I was asked to clarify how AX2009 development licence works and what are the different development licences one needs to have in order to take complete development environment. Actually, you need to have four development licences:
Base Application: This will allow to have access to UI elements like Menus, Forms.
MorphX Development Suite: With this licence you will be able to see the Data Dictionary and other UI objects (reports etc).
Web MorphX Development Suite: Controls access to web development objects in AOT.
X++ Source Code: This licence allows to have access to Class objects in AOT.