This file defines the conditions for contingencies.
The first column is a numerical identifier.
The second column is the strref containing the condition name.
The third column is the strref containing the condition description.
The fourth column is a comment, containing the condition.
In BG2 ToB we have:

2DA V1.0
4294967296
           STRREF     DESCRIPTION CONDITION  
1          31112      30972       HIT        
2          30973      30974       SEEENEMY   
3          30975      30976       HPLT50PERCENT 
4          30982      30983       HPLT25PERCENT 
5          30984      30985       HPLT10PERCENT 
6          30986      30987       HELPLESS   
7          30988      30989       POISONED