              <h1>Developer Notes</h1>
                <p>All ONS charts are based on the <a href="http://www.highcharts.com/">Highcharts</a> library.  The time-series chart is a single line graph, initialised using the <code>timeSeriesChart</code> jQuery plugin, and a data source, which is provided either in the DOM itself or explicitly as an object to the plugin.</p>
<h2 id="usage">Usage</h2>
<h3 id="via-data-attributes">Via Data attributes</h3>
<p>A time-series chart will be automatically initialised if 