A nice feature of the Sparx MDG is that I can create a General Tagged Value Type such as:
Effectiveness:Type=Enum;
Values=Very,Generally,Sometimes,Hardly ever,Almost never,«Unspecified»;
Default=«Uninitialized»;
And in the MDG assign that Tagged value type to a stereotype (metatype) as:
<TaggedValues>
<Tag name="Effectiveness"/>
</TaggedValues>
Notice how I've not had to put in the explicit values at this point (You CAN, but there's no need - EA will helpfully provide the drop-down)!

The NEAT thing is that if the main definition changes (like I alter the enumeration literals), then the metatype's version will automatically take on the new values in the drop-down.

What I'd like to be able to do is now define:
<TaggedValues>
<Tag name="ExpectedEffectiveness" type="Effectiveness"/>
</TaggedValues>
and have the tag inserted into the item as ExpectedEffectiveness but still provide the drop-down from Effectiveness.
As far as I can make out, there is no way to achieve this?

Can anyone confirm you can't re-use a Tagged Value definition in this way?
Also, is this a desirable feature? Should I put in a feature request?