diff --git a/Article-BIRTChartEngine/index.html b/Article-BIRTChartEngine/index.html
index 62f5459..67e35f7 100644
--- a/Article-BIRTChartEngine/index.html
+++ b/Article-BIRTChartEngine/index.html
@@ -138,15 +138,17 @@
 </table>
 <p align="center"><strong>Figure 1. Chart Samples</strong></p>
 <h2>Preparation</h2>
-<p>This article uses Eclipse SDK 3.2.2 and BIRT 2.1.1. The Eclipse
-Callisto Discovery Site can be used to install BIRT and its prerequisite
-plug-ins by selecting &quot;Help &gt; Software Updates &gt; Find and
+<p>This article uses Eclipse SDK 3.2.2 and BIRT 2.1.1. The Eclipse <a
+	href="http://www.eclipse.org/callisto/discovery.php">Callisto
+Discovery Site</a> can be used to install BIRT and its prerequisite plug-ins
+by selecting &quot;Help &gt; Software Updates &gt; Find and
 Install...&quot; and choosing &quot;Search for new features to
 install&quot; in the update dialog. After selecting a mirror update
 site, you can see all features under Callisto Discovery Site as follows.</p>
 <p align="center"><img src="images/selectbirt.png"></p>
-<p align="center"><strong>Figure 2. The Callisto Update Site</strong></p>
-<p>In this dialog, select &quot;Eclipse BIRT Report Designer
+<p align="center"><strong>Figure 2. The Callisto Update
+Site</strong></p>
+<p>In this dialog box, select &quot;Eclipse BIRT Report Designer
 Framework 2.1.2&quot; and click &quot;Select Required&quot;. Now BIRT
 and all its dependency features are selected to install. Then click
 &quot;Next&quot;, and install all these features.
@@ -196,8 +198,7 @@
 elements, like the title, axes, and so on.</p>
 <p align="center"><img src="images/concepts.png" width="700"
 	height="500"></p>
-<p align="center"><strong>Figure 3. Concepts in a Bar
-Chart</strong></p>
+<p align="center"><strong>Figure 3. Concepts in a Bar Chart</strong></p>
 <table width="60%" border="1" align="center">
 	<tr>
 		<th>Concept</th>
@@ -242,15 +243,16 @@
 		<td>Series</td>
 		<td>Defines how to display data, bar, line, or pie, for example</td>
 	</tr>
-</table><p align="center"><strong>Table 2. Some Concepts in Chart.</strong></p>
+</table>
+<p align="center"><strong>Table 2. Some Concepts in Chart.</strong></p>
 <p>Most charts have two or more axes, but some have none. One
 example of a chart with no axis is pie chart. The horizontal axis is
 called base axis. The base axis can be category axis or value axis. The
 category axis just contains a sequence of labels, while the value axis
-contains numeric values. The vertical axis is an orthogonal axis, and it
-is always a value axis. The BIRT Chart Engine supports one base axis,
-and one or more orthogonal axes, but only one orthogonal axis is
-primary. The series determines how to show data. For example, a bar
+contains numeric or datetime values. The vertical axis is an orthogonal
+axis, and it is always a value axis. The BIRT Chart Engine supports one
+base axis, and one or more orthogonal axes, but only one orthogonal axis
+is primary. The series determines how to show data. For example, a bar
 series will show data with a bar graph, and a pie series shows data with
 a pie chart. The series definition defines the color palette, label
 displaying format, and the associated series. Each axis can have more
@@ -433,7 +435,8 @@
 		plug-in).</td>
 	</tr>
 </table>
-<p align="center"><strong>Table 3. Available Device Renderers.</strong></p>
+<p align="center"><strong>Table 3. Available Device
+Renderers.</strong></p>
 <p>We selected <code>dv.SWT</code> as our device renderer, since we
 will render chart on an SWT widget. In the constructor, we add one paint
 listener to do the actual painting work.</p>