I've forgotten how to test to see if the values of two attributes, one on the source side and one on the destination side are equal. I remember we used to use the IF statement w/ a regular expression.

Here's what I want to test

if destination-attr(billybob) equal source-attr(billybob) then trace "they are equal else "they are not equal"

seems simple but I can't get it to work. Thanks in advance.