I have an important question neet to clarify.
For exampe when I manunl boot kernel by uboot, once board startup  and into uboot interactive environment, I manual input follow command as:
 setenv image  zImage_mx....
 setenv nfsroot  /rootfs/rootfs001....
 ... 
if I whan to dispatcher to boot the board kernel, I need write job definition,Is it written like this?:
 boot:
   # list of boot methods which this device supports.
   methods:
     - u-boot:
         parameters:
         ...
         oe:
           commands:
           - setenv image  zImage_mx....
           - setenv nfsroot  /rootfs/rootfs001....