I have to clarify, this is not an email-attribute, but I need to recode the @ into _at_ inn all the ordinary xml-textfields..and they are already going trough the wash operator.
but they dont seem to have the right operators for this. 'contains' would be good if it actually returned the position of the string being contained but it doesn't.
The closest is probably 'explode' using the @ delimiter. Then you implode again with your _ character.