Embedding multiple representations - 7.3

Use the ReadNested function to create a structure that inherits from other structures with different representations.

1. Create a new empty structure with a Flat representation.
2. Create a Root element with the following properties:

   Property	Value
   Group Type	Sequence
   Data Type	None

   For more information, see Structure element properties.
3. Drag a ReadMapInput function in the IO/Database tab of the Root element.
   An I/O function is needed to enclose the ReadNested functions to be added in the next steps. In this example, ReadMapInput is used because there is no need for special I/O handling in this element.

   
4. Create a new PurchaseOrders element under Root, then click the ... button to the right of the Inherits From field and select the structure Examples > Structures > PayPal > PurchaseOrder2.
5. In the Inherited Root drop-down list, select Use Everything.
   The child elements are added under PurchaseOrders.
6. Configure the following properties for the PurchaseOrders element:

   Property	Value
   Group Type	Sequence
   Data Type	None
   Initiator	<PurchaseOrders>
   Include Initiator?	Select this check box

7. Drag a ReadNested function in the IO/Database tab, then double-click them and select the XML representation.
   
8. Create a new POs element under Root, then click the ... button to the right of the Inherits From field and select the structure Examples > Structures > Simple > POStandard > POFile.
9. In the Inherited Root drop-down list, select Use Everything.
   The child elements are added under POs.
10. Configure the following properties for the POs element:

    Property	Value
    Group Type	Sequence
    Data Type	None
    Initiator	<POs>
    Include Initiator?	Select this check box

11. Remove the ReadURL function added automatically to the IO/Database tab and drag and drop a ReadNested function, then double-click it and select the XML representation.
    
12. Press Ctrl + S to save your structure.