No documentation of donor format

[mmaiers-nmdp]

the sample donors file looks like this

12,A*01:01+A*01:01^B*07:02+B*57:01^C*06:02+C*07:02^DQB1*03:03+DQB1*06:02^DRB1*07:01+DRB1*15:01,1,0
13,A*01:02+A*01:01^B*07:02+B*57:01^C*06:02+C*07:02^DQB1*03:03+DQB1*06:02^DRB1*07:01+DRB1*15:01,1,0
14,A*01:02+A*02:02^B*07:02+B*57:01^C*01:02+C*07:02^DQB1*03:03+DQB1*06:02^DRB1*07:01+DRB1*15:01,1,0

Is the first field an id?
What are the last two fields? (1 and 0)

[mmaiers-nmdp]

Yoram says:

1. ID
2. GL-String
3. Relative Frequency (1 means 1.0), this is to support multiple lines per ID with relative frequencies that sum to 1.0
4. ?

[mmaiers-nmdp]

4. is the "rank" of the donor in the list of alternative rows. 0 is the top rank