XML attribute update deletes child nodes

Hi,

I have a XML file and i need to update its node.attributes by some busniess rules, i have observed that with AA360 if i update a node's attribute it gets updated successfully but it will delete the child nodes from that specific node, which is some thing i don't want to happen.

is there a solution to this issue using AA360 ?

in below XML

  <sender myCode="mycode1">

   <invoice classCode="DEV" dts="ins">

    <id ext="test" root="1"/>

   </invoice>

  </sender>

if i update myCode to TestCode i left with, supplying node value seems to be mandatory which i don't want,i guess that is the reason for all this trouble.

  <sender myCode="TestCode">Node update Value </sender>