“[Fatal Error] :1:120: The processing instruction target matching ”[xX][mM][lL]“ is not allowed.” [duplicate]

Answer 1

Another answer to this is using XML within XML will break you need to not parse the inner XML and use the CDATA tag see here:

http://www.w3schools.com/xml/xml_cdata.asp

ie:

  
  
    
  ]]>