This event occurs at the start of a CDATA section. CDATA sections begin with the string “<![CDATA[” and end with the string “]]”, and are used to "escape" blocks of text containing characters that would otherwise be recognized as XML markup. The parser passes the address and length of the text containing the opening characters “<![CDATA[”. The parser passes the content of a CDATA section between these delimiters as a single content-characters event. For the example, in the above example, the content-characters event is passed the text "We should add a <relish> element in future!".