EDI with XI

Hi all,

In case of a project , where the decision between Seeburger and the conversion agent is not yet taken by my client.

I would like to test and create the flow manually.

But i need an external definition or XML file or XSD schema for a purchase order, DESADV and invoice.

Has anybody experience with building the flow manually (without Seeburger or the conversion agent)

is somebody so kind to send me up an example of these three edi types where i can map the idoc to.

Thank you in advance

Regards

Gwen