Parsed text is a string of characters which is processed by the XML parser. For example, if a "<" symbol is found, it will usually be translated as the start of a tag or a comment. XML reserves the two characters "<" and "&".
Parsed text can include these characters by using the special sequences "<" for "<" and "&" for "&".
Alternatively, you can use a CDATA section. Text inside a CDATA section is not parsed, except to search for the special sequence of characters which is used to end the section. CDATA sections begin with the string "<![CDATA[" and end with the string "]]>". For example:
<ABC><![CDATA[Text with "<" and "&" but parser not confused]]></ABC>
For more information, refer to the official XML specification at http://www.w3.org/TR/REC-xml or any good XML book or Web site.