UBL 2.1 Invoice and Utility Statement

Hello,

 

I have successfully created UBL 2.1 Invoice and Utility Statement as supplement to that Invoice.

 

How can I extend UBL Invoice 2.1 with Utility Statement to have one master schema with Invoice and it's supplement?

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Do I need to fill parts in Utility Statement like Sender/Receiver/Copy Indicator/Issue Date/Customer etc -  because I already have them in main Invoice?

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The main part that I need from Utility Statement is -  Subscriber Consumption
and I've mapped everything I needed.

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The main idea is to send to our partner UBL 2.1  Invoice with Utility Statement supplement and attached invoice pdf.

 

Thanks