Formal grammars are well established 
for specifying the syntax of programming languages.
However, the formal specification of programming
language semantics has proven more elusive.
A recent standard,
the Unified Modeling Language (UML), has quickly become
established as a common framework for the specification
of large scale software applications.
In this paper, we describe an approach for using
the UML to solve the name lookup problem for 
the recently standardized C++ programming language.
We apply our approach to C++ because
a solution to the name lookup problem
is required for parser construction and the development of
analysis and testing tools.