To copy the value of an attribute or leaf-element in the source to an attribute or leaf-element in the target, drag a line from the source node to the target 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 41-10 shows the map view where the PurchaseOrder/ID source element is mapped to the Invoice/ID target element. Notice that a line connects the source and target nodes. Also, the ID element in the target tree is no longer grayed, and appears in normal font. This means that the ID element has been added to the XSLT map.