Expression definition
Keywords: expression
An expression definition consists of the expression header and an optional code section. When the code is defined somewhere else, the code section can be omitted. Expressions are identified by an expression name. When an expression has several implementations, the expression name must be extended by the implementation name. For expressions with only one implementation an implementation name (i00) is generated, when not being defined.
Expressions are introduced by the EXPRESSION keyword.
Definition:
expression := _expression expr_spec