Highcharts.chart('container', {
    title: {
        text: 'The <em>series.keys</em> option'
    },
    subtitle: {
        text: 'Specifies which array options map to which keys'
    },
    tooltip: {
        pointFormat: '{series.name}: <b>{point.percentage:.1f}%</b>'
    },
    plotOptions: {
        pie: {
            allowPointSelect: true,
            cursor: 'pointer',
            dataLabels: {
                enabled: true,
                format: '<b>{point.name}</b>: {point.percentage:.1f} %'
            }
        }
    },
    series: [{
        type: 'pie',
        name: 'Browser share',
        keys: ['name', 'y', 'sliced', 'selected'],
        data: [
            ['Firefox', 45.0],
            ['IE', 26.8],
            ['Chrome', 12.8, true, true],
            ['Safari', 8.5],
            ['Opera', 6.2],
            ['Others', 0.7]
        ]
    }]
});
