The bpelx:rename extension in an assign activity enables a BPEL process service component to rename an element through use of XSD type casting. In Oracle BPEL Designer, you add the bpelx:rename extension by dragging the rename icon in the upper right corner of the Copy Rules tab to the target variable you want to rename, and releasing the cursor. The rename icon displays to the right of the remove icon shown in Figure 6-33. After releasing the cursor, the Rename dialog is displayed for renaming the target variable. You can also drag this icon to the center canvas to invoke this dialog, specify the name, save and close the dialog, and then drag the icon to the target node.