Hi Jan - Did you raise the context of @name and @iskey ? If so keep it normal and try..
please note that, It would be very difficult to provide the solution with imaginary structure.
I'm asking for the source structure(data type)
How would i know what/how/where is @name occurs in the payload ?
Please share the structure of both source and target and sample xml that you are trying to test so that we can suggest you..