SOLM — 'UML' Code product type

The model makes use of a 'UML' Code product type - if you set the Language for each class to '<none>' you not only get the same PrimitiveTypes, but the XMI exporter will produce the correct hrefs in the XMI to those DataTypes defined in UML

This resolution applies to the language selection in the non-normative model as
captured in Enterprise Architect and results in changes to the normative XMI
model when it is exported. The “revised text” below illustrates the impact on the
XMI model, but does not identify every line changed, since the XMI is machine
generated.