Referencing an attribute as the final ifelse/ifelse conditional value

[James McMahon]

UpdateAttribute is flagging the final } in my expression. How can I make
the final value an attribute reference?

I need to set attribute currentAttribute to itself if neither ifElse case
matches

${this.set:equals('ABCD'):and(${filename:find('.*daily.*)}):ifElse(
    ${this.set:equals('ABCD'):ifElse(
          'val_if_second', 'val_if_first'
     )}
    ${currentAttribute}
)}

I have used this syntax before, but with a value in that last position. How
can I do this?

I would be happy to just leave it out, but I am given to understand it the
ifElse / ifElse pair required it.