A means in PMC to identify products in a unique way. Updates at
the distributor side are provided with the base VRC identifier. A base VRC can
contain the code of the physical VRC in which the related master product is
installed, for example, B61_a, but can also be a code not related to a physical
VRC, for example, 7.6_a_tt. At the recipient side, every update VRC is linked
to a base VRC identifier. The installation process checks if the base VRC
identifier of the update matches with the base VRC identifier of the update
VRC. If not, you cannot install the update in that update VRC.