In general xml-parser can try to parse all elements in the xml document.But its failure when we try to kept html content inside of xml doc's.like this
<xml>
<mydata><html><h1>SubramanyamRaju</h1></html></mydata>
</xml>
Because Html content tag includes ('<' &'/>') which treated as xml element and at this case xml parser is failed to parse.
To solve this we need to kept html content inside of CDATA like this
<![CDATA[..html content..]]>
Example:
<xml>
<mydata><![CDATA[<html><h1>SubramanyamRaju</h1></html>]]></mydata>
</xml>
CDATA:
Text inside a CDATA section will be ignored by the parser.
