In the VMS context, there are two enumerations for pictorgrams:
VmsDatexPictogramEnum and VmsDatexSupplementalPictogramEnum.
They are used in two different classes. Newertheless, there are cases, where you need a pcitogram in the supplementary panel which is located only the 'main' enumeration (and maybe vice versa).
Couldn't it be useful to combine them into just one enumeration and use it in both classes?
(By the way: Do we need the 'Datex' in the names of the enumerations?).
Regarding the pictogram list, the CEN ISO/TS 17423 (under revision to become an EN ISO) is a reference.
According the Convention on Road signs and signals (also known as Vienna convention) applicable in most European countries, the pictogram and the additional panel do not have the same role. Therefore it is logical to create two distinct enumeration lists. To merge these lists could induce very strange descriptions.