UMLR — Guidance for Representing Enumeration Values

Guidance should be given as to how to use the properties of
EnumerationLiteral to represent the typical scenario of an
EnumerationLiteral having a distinct value and meaning e.g. the color
Blue is represented as the code B or the number 5. In this case I would
expect the name of the EnumerationLiteral to be "Blue" with an
associated LiteralString (via inherited property
InstanceSpecification::specification) of "B" or LiteralInteger of 5. The
notation for this could be that for default values e.g. Blue = "B" in
the 'attribute' compartment. Or alternatively the InstanceSpecification
syntax could be used as per Figure 7.52.