This file defines the amount of maximum value of experience points available for players.
In BG1 TotS we have:

2DA V1.0
89000
           	VALUE      
MAGE       	161000     
FIGHTER    	161000     
CLERIC     	161000     
THIEF      	161000     
BARD       	161000     
PALADIN    	161000     
DRUID      	161000     
RANGER     	161000     
FIGHTER_MAGE 	161000     
FIGHTER_CLERIC 	161000     
FIGHTER_THIEF 	161000     
FIGHTER_MAGE_THIEF 161000     
MAGE_THIEF 	161000     
CLERIC_MAGE 	161000     
CLERIC_THIEF 	161000     
FIGHTER_DRUID 	161000     
FIGHTER_MAGE_CLERIC 161000     
CLERIC_RANGER 	161000     

where:
Names in the first column are class identifiers. The second column consists of the number of maximal allowed xp value for players. The famous xp cap remover works very simply - instead of these numbers everywhere is set value -1.