Quotes in expression

Hi,

I'm having issues with a the ' character.

What I'm looking to do is create a line that says:
$content-file/Doc/Field['myField']/table/row

I have used the following expression:
concat('$content-file/Doc/Field[@FieldName='',{$data},'']/
table/row')

However the result of this looks like
$content-file/Doc/Field['{$data}']/table/row

If some could shed some light on this, I'd be grateful.

Cheers,
   Ed