Agree with the code system…

Agree with the code system and value set identified. The VSAC direct url for this value set is 

I would like to also have the ISA include RxNorm as an additional code system to describe vaccines. That value set is Vaccine Clinical Drug 2.16.840.1.113762.1.4.1010.8

added value of RxNorm

Given the uptake of CVX/MVX standards, what would the added value of RxNorm be in representing vaccines over CVX/MVX along?