Embedded fields defined by a stereotype

Hello, 

New to this forum. Please point me in the right direction if this isn't the right place, or a similar question has been answered:

Q: Is it possible to create a stereotype whereby custom enumerations can be selected from a drop down menu?

The attached illustrations attempts to illustrate the idea.

- A value type named 'Country' contains a custom enumeration list of Countries. The user would populate the list of countries by selecting one or more countries.