A Map statement is the basic building block of an XMap object and maps a simple input value to a simple output value. The input must be a single value or a constant value. You must define the input and output in a Map statement.
When you drag and drop between a simple, non-repeating input schema node and a simple, non-repeating output schema node, a Map statement is automatically created.
A Group, Repeating Group, Option or Default statement can contain one or more Map child statements.