This file defines lore increase per level according to creature class.
The first column is filled by classes identifiers.
The second column is filled by modifiers per level for lore for given class.
In BG1 TotS we have:

2DA V1.0
1
           RATE       
MAGE       3
FIGHTER    1
CLERIC     1
THIEF      3
BARD       10
PALADIN    1
DRUID      1
RANGER     1