From one to the other

In order to make data available on the Web, one can use HTML:

<html>
  <head><title>CD stocks</title></head>
  <body>
    <h3>CD stocks</h3>
    <table>
      <tr><th>Artist</th><th>Title</th><th>Price</th><th>In-store</th></tr>
      <tr><td>Supertramp</td><td>Even in The Quietest Moments...</td><td>12.99 EUR</td><td>4</td></tr>
      <tr><td>Runrig</td><td>The Big Wheel</td><td>5.99 EUR</td><td>12</td></tr>
      <tr><td>Queen</td><td>The Miracle</td><td>5.99 EUR</td><td>1</td></tr>
    </table>
  </body>
</html>

Artist	Title	Price	In-store
Supertramp	Even in The Quietest Moments...	12.99 EUR	4
Runrig	The Big Wheel	5.99 EUR	12
Queen	The Miracle	5.99 EUR	1

Or one can design custom XML markup

<inventory date="2002-03-23">
  <title>CD stocks</title>
  <record in-store="4">
    <artist>Supertramp</artist>
    <title>Even in The Quietest Moments...</title>
    <price unit="EUR">12.99</pre>
  </record>

  <record in-store="12">
    <artist>Runrig</artist>
    <title>The Big Wheel</title>
    <price unit="EUR">5.99</pre>
  </record>

  <record in-store="1">
    <artist>Queen</artist>
    <title>The Miracle</title>
    <price unit="EUR">5.99</pre>
  </record>