n if="not($dynamic-itemset = 'true')" ev:event="xforms-enabled xforms-value-changed">
                                            <xxforms:variable select="xxforms:itemset('select1', 'xml')//item" name="select-items"></xxforms:variable>
                                            <xxforms:variable select="($select-items/value)[position() &gt; count($select-items) div 2]" name="values"></xxforms:variable>
                                            <xxforms:variable select="$select-items[index-of($values, $e