You can use STRTRAN to convert

& --> &
< --> &lt;
> --> &gt;
" --> &quot;
' --> &apos;

>Yes. I remember out thread but
>Its just looks not a same for me ..
>for example & must be converrted to [amp] word there.. not to %..
>I am not sure about my XML which has in header

<?xml version="1.0" encoding="ISO-8859-1"?>

will readable..
>but.. if the string has exact "&" character - the XML is invalid
>