Mostly the other way round. There are 2 use cases I know of: 1. You generate invoices in your ERP and have all the info. To make your client's life easier, you

Mostly the other way round. There are 2 use cases I know of: 1. You generate invoices in your ERP and have all the info. To make your client's life easier, you embed the info as XML, so he doesn't need to type it from the PDF. 2. You get invoices without XML and use e.g. invoice2data[1] to extract key fields and then add them as XML for later. 1: https://github.com/invoice-x/invoice2data https://github.com/invoice-x/invoice2data