Aggregating nested loops into a simple loop

Convert an XML structure with nested loops into a flat CSV structure by aggregating nested loops.

AddressesShipping
	Address (0:*)
		Name
		Street
		City
		State
		Zip
		Country
		DeliveryNotes
		PartNumber_1
		ProductName_1
		PartNumber_2
		ProductName_2
		PartNumber_3
		ProductName_3

1. Drag the following input elements to the corresponding output elements:
   • Name
   • Street
   • City
   • State
   • Zip
   • Country
   • DeliveryNotes
2. Drag the input PartNumber element to the output PartNumber_1.
   Since the output structure is already looping on the input Address element, this causes a conflict.
3. In the dialog box that opens, select Generate AgConcat value expression and click OK.
   With this option, all values for the PartNumber elements contained in each Address element are aggregated in a single field using an AgConcat function. If you want to have a single value per field, you need to use a filter.

   
4. Drag a SingleIndex function to the Filter argument in the Value tab of the output PartNumber_1 element.
   To get the value of the first PartNumber element, you can leave the default value for the index.
5. Drag the input PartNumber element to the output PartNumber_2 and PartNumber_3 elements, then select Generate AgConcat value expression in the dialog boxes that open and click OK.
   The filters are automatically configured based on the expression defined in PartNumber_1.

   
6. Repeat the previous steps to map the input ProductName element to the output ProductName_1, ProductName_2 and ProductName_3 elements.

   Example

   

Name,Street,City,State,Zip,Country,DeliveryNotes,PartNumber_1,ProductName_1,PartNumber_2,ProductName_2,PartNumber_3,ProductName_3
Deandre King,4894  Winding Way,Southfield,MI,48075,USA,Please leave packages in shed by driveway.,872-AA,Lawnmower,926-AA,Baby Monitor,,
Burl Clark,3807 Pointe Lane,Fort Lauderdale,FL,33308,USA,,356-KX,Gas canister,,,,