A VRC Combination is defined at the PMC recipient side and
consists of a set of related Update VRCs. The VRC Combination will guarantee that, if
required, the related update VRCs are updated simultaneously at the PMC
recipient side. In this way, you can avoid compatibility problems between
related update VRCs. For example, if you use the standard application and you
also have an extension installed, you will have two update VRCs defined. If a
co-requisite dependency is defined between a standard solution and a solution
for the extension, PMC installs both solutions in one run if you linked the
update VRCs for both standard and extension in one VRC
combination.