Clickable GSIM:

The Base Object Group discussion at the CSPA LIM sprint in Paris November 2015 suggests that the cardinality should be 0 ..1 and not 0 .. *

This both simplifies the model and provides focus for all non-mandatory attributes to be carried.

The Base Object Group discussion at the CSPA Lim sprint in Ottawa June 2017 supports that the cardinality should be 0...1 and not 0..*