Hello VinceChen,
what was the result of executing your update?
In my environment the query you posted gives an error, because the namespace prefix “ino” is not bound to anything.
As the ino:id attribute is not used in the example, I simply deleted it from the $r document. The update then executes correctly, and the value of the “by” attribute is “testing” after the update.
(The value of the “Greeting” element itself is still “HellO!” of course, as we have not updated this yet.)
I hope that helps,
Trevor.
#API-Management#webMethods#Tamino