Hi Wolfgang,
In your source schema, is the Max Occurs property set to unbounded at the Record node level or the Element node level? Also, I don’t think you can make Element1 as your root node in your destination schema, you can have it as a Field Element below a Record node or something like that.
If you set up your data structures properly in both schemas, using a Looping functoid and linking field elements between both schemas in a map should be sufficient to achieve your goal.
Daniel.