Data statement format used by the .sh scripts

Hello Every one,

Can some one explain me the under mentioned Data
statement format including the insert
parameters....which is excessively used in
pg_attribute.h ,pg_class.h,pg_proc.h and at many more
places..... 

DATA(insert ( 1255 prosrc 26 -1 -1 -1 0 -1 -1 f x
i f f f t 0));

Thanks,
Nauman

    
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