Example 1: 
<?xml version="1.0"?>
<table>
  <tr id="row1">
    <td foo="bar">one</td><td foo="bar">two</td><td foo="bar">three</td>
  </tr>
  <tr id="row2">
    <td foo="bar">four</td><td foo="bar">five</td><td foo="bar">six</td>
  </tr>
  </table>

Example 2: 
six
Example 3: 
<?xml version="1.0"?>
<table>
  <tr id="row1">
    <td>one</td><td>two</td><td>three</td>
  </tr>
  <tr id="row2">
    <td>four</td><td>five</td><td>six</td>
  </tr><tr><td/><td/><td/></tr>
  </table>