074a979e_09___Dynamics_AX_2009_Features__Feature
[Sr.No.] 1 [Description] 3 new Solution Layers SL1, SL2 and SL3 have replaced DIP, LOS and LOP to enable Microsoft Dynamics Industry Solutions deployments. DIS Layer renamed to HFX layer which can be used for hotfixes. [Feature] 
Layers
Dilip's blog on DYNAMICS AX: What’s New in Dynamics AX 2009 / Dynamics AX 2009 Features
Feature