Use the <assign> step to reassign a value to a previously declared variable. It is a shared step that may be used in either a component or a simple execution plan. It is a check-in time error if the variable being assigned to is not an already defined variable in a plan or component local scope.
The <assign> element has two required attributes:
varName — A value of type Identifier that identifies the name of the local variable to which the value is assigned.
value — A value of type String that contains the value to be assigned to the named variable.