<https://community.tibco.com/forums/topic/133-how-to-remove-empty-xml-tags-in-tibco-businessworks/#comment-16566>
<http://schema.org/text>
"If A1,A2, A3 are your source elements and which are optional.B1,B2,B3 are your target elements and if you are mapping one-to-one then you have to apply if(EXISTS()) function for each element. You can't apply only one IF condifition if any subset of elements may come in the source element.   \nIn case if your scenario is some thing like the source xml contains all of A1,A2,A3 or none of them (not a subset of A1,A2,A3) then you can apply a single IF condition on the top. "
<https://community.tibco.com/forums/topic/133-how-to-remove-empty-xml-tags-in-tibco-businessworks/>