The bpelx:remove extension in an assign activity enables a BPEL process service component to remove a variable. In Oracle BPEL Designer, you add the bpelx:remove extension by dragging the remove icon in the upper right corner of the Copy Rules tab to the target variable you want to remove, and releasing the cursor. You can also drag this icon to the center canvas to invoke a dialog, specify the rule, save and close the dialog, and then drag the icon to the target node. Figure 6-33 provides details.

After releasing the cursor, the bpelx:remove extension is applied to the target variable. Figure 6-34 provides details.