Assignment Statement

 
assignment_stmt = assignment_receiver ( ':=' | '+=' | '-=' )  expression ?;? .
assignment_receiver = [ coercion ] ( global_ref | parameter_ref  | general_ref { coercion_qualifier } .
coercion_qualifier = [ coercion ] qualifier .
The assignment statement is used to assign values to attributes, local variables, global variables, and formal parameters. With respect to the definition in the EXPRESS language, the definition of the assignment statement in EDMexpressX^ has been enhanced with two new operators as well as the Coercion declaration.