C2MS11 — Need Review/Documented Explanation of NUM-OF-PROD-SUBTYPE-SUBCATEGORIES

The purpose NUM-OF-PROD-SUBTYPE-SUBCATEGORIES in several messages is not clear and needs to be reviewed and either removed or expanded upon. Note that this is called NUM-OF-PRODUCT-SUBTYPES in C2MS 1.0, but the explanations are simply preserved from 1.0 into 1.1 where the field was renamed, so this issue persists. One interesting aspect of this is that these subtype subcategories are represented in the subject of the Product Message ME5 and ME6, and all other messages that have it refer to this Subject construct.