XMI11 — Examples are instances of non-MOF metamodels (medium)

Example 3 in A.4 purports to show instances of the Department model defined
in the previous example (it says that "Department is considered the
metamodel for Chemistry"). However Department is not a MOF-compliant
metamodel (it is a fairly basic UML model). So XMI just does not apply!

Similarly the XMI Document Instance in Example 4 in A.5 shows instance data
for the Mail model which again is not a MOF-compliant metamodel.