Actually, the process for creating the individuals is not included in this
use case. But I've work on this problem by proposing a set of model
transformations. To respond to this problem we need an high order
transformation which generates a model transformation that takes as input
a model conforms to the metamodel we want to annotate (in the example the
Museum metamodel), and produces a model containing the individuals. In
other words you don't need to create annotations for the individuals.
If you are interested by testing it, i can send you this set of model
transformations.