Summary as a Div

[M Harris]

I'm a bit confused by reading the API.  I can't figure out how to get the 
desired result

<summary type="xhtml">
    <div xmlns="http://www.w3.org/1999/xhtml"; 
xmlns:p="http://www.example.org/p";>
        Some information here with a <span class=".."> and a date formatted in 
XML format
   </div>
</summary>

within an entry

I tried creating a div with simple text but that did not even show up at all.