UML22 — ptc-03-09-15/Relationships among Core packages

Issue: The superficial impression that Core::Abstractions is the lowest
layer in the U2P Core does not stand up under close examination.
Core::Basic is closer to being the fundamental layer because it uses none of
the new association modeling constructs (such as derived unions and subsets)
to define itself; but is not entirely so because it imports two packages
from Abstractions.

Recommendation: It would be worth considering whether the two packages that
Basic imports from Abstractions can be placed in Basic, so that Basic is
unambiguously the lowest layer in Core. This would also make EMOF
unambiguously the lowest-—i.e. the most fundamental—-layer of MOF, since
EMOF is based on Core::Basic while CMOF is based on Core::Constructs.

No Data Available