Hi P2 dev :)
I was looking for the definition and implications of 
IProfile.PROP_PROFILE_ROOT_IU.
In particular we're interested in the implications of this property during 
updates, looks like implicit updates are prevented for root IUs,
and we're looking for ways to make them work for our "group IUs":

Category "Cat"

è Requires(o, ng) IU "Group 1" 1.0

è Requires(o, ng) IU "Group 2" 2.0
(o, ng): (optional, non-greedy)

One way we're considering is making use of the categories we install:  Rather 
than setting "root" for all group IUs we could only set root for categories.
Problem is I'm unsure the "non-greedy, optional" dependencies in the category 
will prevent a GC from happening on our group IUs?

As usual thanks all for your help and insight! :)
Helmut



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