table relation between PO receipt <-> invoice <-> ap

Finance and Operations/AX User Forum
1

What is the relation between PO receipt <-> invoice <-> AP ??

For example,

We would like to know this item invoice in VendInvoiceTrans table is created for which PO receipt in VendPackingSlipTrans table.

Moreover, we would like to know this AP voucher in ledgerjournaltrans table is created for which invoice in VendInvoiceTrans table.