er"><code>a[:]</code></td>
<td align="center"><code>a[1]</code>, …, <code>a[N]</code></td>
</tr>
<tr class="odd">
<td align="center">all</td>
<td align="center"><code>a[]</code></td>
<td align="center"><code>a[1]</code>, …, <code>a[N]</code></td>
</tr>
</tbody>
</table>
<div id="multiple-index-semantics" class="section level3 unnumbered">
<h3>Multiple Index Semantics</h3>
<p>The fundamental semantic rule for dealing with multiple indexes is the
following. If <code>idxs</code> is a multiple index, then i