rance="xxf:internal" xxbl:scope="inner">
                            <xxf:variable name="binding" as="node()?">
                                <xxf:sequence xxbl:scope="outer" select="."></xxf:sequence>
                            </xxf:variable>
                            <xxf:variable select="$binding/string()" name="value" as="xs:string">
                                <xf:action ev:event="xforms-value-changed xforms-enabled">
                                    <xf:action if="$binding castable as xs: