UML14 — Datatypes: Expression

Summary: the metaclass Expression includes an attribute called "language" of type
Name. To enable tools to check OCL expressions, it is neccesary to
define a standard value for this attribute, which denotes the fact that the
expressions is an OCL expression.
Without such a standard defined value tools cannot distinguish OCL
expresions and cannot interpret them (for purposes of typechecking,
code generation, etc....)

I propose to add the value "OCL" as a standard value for the attribute
"language" of metaclass "Expression" to the chapter on datatypes.

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