Error Correction Table Format

The table headings are:

Block inner  |      outer code      | outer   |       inner code
  #   code   |       erasures       | code    |         changes
      changes|1st   2nd   3rd   4th | changes |    0   1   2   3   4
----  ------ |---   ---   ---   --- |   ---   |  --- --- --- --- ---
  

Below is a list of each of the above column headings, from left to right, and an explanation of what is meant by each column heading.