<td> EventRiver is commonly used to display multiple events with time attribute, the evolution of events can be shown by time sequence.</td>
</tr>
<tr>
<td> treemap </td>
<td> Treemap is commonly used to display a tree structure. And treemaps are very effective when size is the most important feature to be displayed..</td>
</tr>
<tr>
<td> venn </td>
<td> Venn shows all possible logical relations between a finite collection of different sets.</td>
</tr>
</table>
<h3>Chart Types<aname="Chart-Types"></a></h3>
<P> The charting library includes basic single chart type and combination chart type. </P>