When you drag a node from the input schema to the output schema, the Developer tool creates a Map, Group, or Repeating Group mapping statement in the grid. You can update the mapping statement. The Input and Output fields contain the elements from the schema. If you want to create mapping statements to provide context or to define Router options, you can type statements in the grid.
When you select a mapping statement in the grid, the XMap editor highlights the nodes from the input and output schemas that are in the grid statement.
You can copy a statement from one row to another row in the grid. If the row is not valid for the location in which you copy it, the XMap editor displays a dialog box with a validation error. You can change the input and the output XPath statements on the dialog box to adjust the mapping statement context, or you can change the input and output XPath fields in the grid.