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

2DA V1.0
8000000
           	VALUE      
MAGE       	8000000    
FIGHTER    	8000000    
CLERIC     	8000000    
THIEF      	8000000    
BARD       	8000000    
PALADIN    	8000000    
DRUID      	8000000    
RANGER     	8000000    
FIGHTER_MAGE 	15000000   
FIGHTER_CLERIC 	11000000   
FIGHTER_THIEF 	11000000   
FIGHTER_MAGE_THIEF 22500000   
MAGE_THIEF 	15000000   
CLERIC_MAGE 	15000000   
CLERIC_THIEF 	9900000    
FIGHTER_DRUID 	11000000   
FIGHTER_MAGE_CLERIC 22500000   
CLERIC_RANGER 	13200000

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.