on</th>
<th>Description</th>
</tr>
</thead>
<tbody>
<tr>
<td><code>A ~ B</code></td>
<td>4</td>
<td>left</td>
<td>Recursive Composition</td>
</tr>
<tr>
<td><code>A , B</code></td>
<td>3</td>
<td>right</td>
<td>Parallel Composition</td>
</tr>
<tr>
<td><code>A : B</code></td>
<td>2</td>
<td>right</td>
<td>Sequential Composition</td>
</tr>
<tr>
<td><code>A &lt;: B</code></td>
<td>1</td>
<td>right</td>
<td>Split Composition</td>
</tr>
<tr>
<td><code>A :&gt; B</code></td>
<td>1</td>
<td>right</td>
<td>Merge Comp