A description of the
reasons that the classification of this element is more restrictive than a
simple roll-up of the sub elements would result in. This acts as an indicator
to
rule engines that there is not accidental over classification going on and to
users that special care beyond what the portion marks reveal must be taken when
using this data. Use of this mark does not replace the need for the compilation
reason being defined in the prose in accordance with ISOO Directive 1. For
example this would document why 3 Unclassified bullet items form a Secret List.
Without this reason being noted the above described document would be considered
to be miss-marked and overclassified.