This file is related to the fighter stronghold (the Keep). It controls the text box that can appear informing you of your progess.
The first column contains identifiers.
The second column contains the spl file to be given at the end of the sequence.
The third column lists the strrefs to be used in the text box.
In BG2 ToB we have (kprevolt):

2DA V1.0
9
	           0          1
SWITCH     	DEFAULT    REPUTATION
DEFAULT    	-1         -1
GOOD_REPUTATION -1         40104
BAD_REPUTATION 	-1         40104
GOOD_POWER 	NONE       NONE
BAD_POWER  	NONE       NONE

Description applies to: