How to Perform a Value Copy by Linking Nodes
To copy the value of an attribute or leaf-element in the source to an attribute or leaf-element in the XSLT pane, drag a line from the source node to the XSLT node. A green highlighted line appears as you are dragging and dropping. When you complete the drop, a line is drawn connecting the source and target nodes.
Figure 41-30 shows the XSLT view where the PurchaseOrder/ID
source element is mapped to the Invoice/ID XSLT
element. A line connects the source and XSLT node.