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Mapping data using a group element

Procedure

  1. In Talend Studio, open the Job used in Launching a lookup flow to join complementary data to display it in the design workspace, and double-click the tXMLMap component to open its Map Editor.
  2. In the XML tree view of the Customer output table, right-click the customer (loop) node and select Delete from the contextual menu.
    All of the elements under the customers root node are removed, you can now reconstruct the XML tree view that can be used to group the output data of interest.
  3. Right-click the customers root node and select Create Sub-Element from the contextual menu. In the pop-up dialog box, enter the name of the new sub-element. In this example, it is customer.
  4. Click OK to validate the changes and close the dialog box.
  5. In the row2 lookup input table, select the LabelState node and drop it onto the customer node in the output table. In the pop-up dialog box, select Create as sub-element of target node and click OK to close the dialog box.
  6. Right-click the customer node in the output table and select Create Sub-Element from the contextual menu. In the pop-up dialog box, enter the name of the new sub-element. In this example, it is Name.
  7. Click OK to validate the changes and close the dialog box.
  8. In the row1 main input table, select the id and CustomerName nodes and drop them onto the Name node in the output table. In the pop-up dialog box, select Create as sub-element of target node and click OK to close the dialog box.
  9. In the output table, right-click the Name node and from the contextual menu select As loop element to set it as the loop element, then right-click the customer node and from the contextual menu select As group element to group the output data according to the LabelState element.
  10. Click OK to validate the changes and close the map editor.
  11. Press Ctrl+S to save the Job and then F6 to run the Job.

Results

The id element and the CustomerName element contained in the loop are grouped according to the LabelState element. The group element customer tags the start and the end of each group.

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