DAC38RF86: Questions about data structure in jesd204b

I‘m a developer using DAC38RF86EVM which uses jesd204b to receive pattern data from FPGA .Now I'm confusing because I'can't get the meaning of  " unbit " and "enbit" in this table about  data structure in jesd204b  though there‘s no interpretation in this  User Guide。

Kailyn Chen：

Hello,

#un means number of unencoded bits

#en means number of encoded bits