XML

XML NameSpaces, or xmlns is used as a prefix to assign elements to a namespace.
"
xmlns:h="http://www.w3.org/xml">........

.........

..<h:td>Content</h:td><h:td>More Content</h:td>

"

I'm pretty sure I actually don't need to know this.

<  &lt;

>  &gt;

'   &apos;

"  &quot;

& &amp;