he string "page", <code>TagException</code>
            is
            thrown with an informative error message, ensuring page location
            information is saved.</p>

            <p>This handler operates in one of two ways.

            <ol>

            <li><p>The user has set "var", "value" and (optionally)
            "scope" attributes.</p></li>

            <li><p>The user has set "target", "property", and
            "value"
            attributes.</p></li>


            </ol>

            <p>