# fn:exists - XPath XQuery Reference

Returns true if the argument is a non-empty sequence.deterministiccontext-independentfocus-independentIf the value of $arg is a non-empty sequence, the function returns
               true; otherwise, the function returns false. fn:exists(fn:remove(("hello"), 1))false()fn:exists(fn:remove(("hello", "world"), 1))true()fn:exists([])true()fn:exists(map{})true()fn:exists("")true()Assuming $in is an element with no children:
               let $break := 
               return fn:exists($break)
            The result is true().