Sometimes a "Best practice" turns into Righteous Rules.
For instance, in many CoBOL shops, it is common to number data like
this:
01 my-data-1.
05 my-data-2.
10 my-data-3 pic x(03).
10 my-data-4 ...
The reason for this is to allow some room for insertion of new level
numbers without having to re-code e.g.
01 my-data-1.
05 my-data-2.
07 my-group-1 occurs 3.
10 my-data-3 pic x(03).
10 my-data-4 ...
But many times, once this is defined as "best practice", the standards
people won't allow the 2nd piece of code - because it doesn't follow
"best practice".
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