TEXT file doubt

[murali dhar <hydchap1@xxxxxxxxx>]

Good Morning friends,

I have the following command in my CL        

FMTDTA     INFILE((&FLIB/YCP05305)) +                 
 
             OUTFILE(&FLIB/YWKCP53T) +                
 
             SRCFILE(YGSC/QDDSSRC) SRCMBR(YCP05310S) +
             OPTION(*NOPRT)                           
 

I know that some sorting is going on the infile 
YCP05305  and producing the outfile YWKCP53T
based on the selection criteria written in the text
file YCP05310S.
when i saw this text file YCP05310S, i could see
following
 HSORTR    24A        3X  83 N N                    
 I                                                  
 FNC  10  17                       ACCOUNT          
 FNC   4   5                       EXCH             
 FNC   2   3                       FC               
 FNC  25  26                       YEAR             
 FNC  23  24                       MONTH            
 FNC  58  58                       P/C              
 FNC  39  43                       STRIKE           
 FNC  76  77                       PROMPT DAY       
 FDC   1  83          
Can anyone let me know how the selection criteria is
happening here in the above text file(what is this
code doing), I could not understand. Also I have seen
some folks suggesting some time back some manual on
this textfiles to read.
I request you post it again  , Thanks so much for your
help! If more info is required plz ask me.

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