This file defines the text of the "special powers" extended headers (Haste and Invisibility of the Ring of Gaax, etc...)
First column consists of ITM filenames
Columns 2- 4 are just the strrefs consisting of name of special abilities
-1 simply means that there are no special ability.
In BG1 TotS we have:

2DA V1.0
-1
           1          2          3
WAND05     15531      13047      -1
DAGG05     15527      15529      -1
AX1H04     15527      15529      -1
AX1H05     15527      15529      -1