The channels of T_CobbleStone_Smooth_M and T_CobbleStone_Smooth_D?

Development Programming & Scripting
1

The green channel of T_CobbleStone_Smooth_M is Ambient Occlusion Map and the red channel is Speculare. Is that correct?
And the alpha channel of T_CobbleStone_Smooth_D is Height Map?