Create and send valid billing requests (XRechnung)

[fongie]

• Create valid DiGA XRechnung bills. Try to find some xsd to use - but gkv dont provide them - otherwise start from this example https://github.com/bitmarck-service/validator-configuration-diga/blob/master/src/test/resources/dre0/xrechnung-2.0-richtig.xml
• Encrypt and send them to an endpoint using the correct process identifiers. Should be able to use existing library classes for this
• Create test methods to send test bills (similar to how code validation works in the library)

[fongie]

What we know so far:

• You are supposed to send one invoice per code validation.
• You need to send in "UStG" and "XRechnung" format. In addition, there are certain fields which need to be filled in correctly. They are listed in here on page 13.
• You can send invoices of type 384 ("corrected invoice") and 877 ("final invoice"). Let's target 877 first.

Resources:

• Bitmarck validation repo has examples of correct and incorrect bills here
• There is some sort of official repository which provides schematron files for XRechnung here. Unfortunately they don't have xsd but maybe you can convert to it from schematron (?). They also have a visualization repository with xsl transformators.
• There is an open source library which could be interesting here, looks like they claim they can create XRechnung invoices. Check it out. No maven release unfortunately.
• There are a few more resources on github, non-java and not sure how helpful. But here is one implemented in Delphi (?!) and here is something in Go which could be used for inspiration if nothing else.

[fongie]

there is an xsd by itplr-kosit here https://github.com/itplr-kosit/xrechnung-visualization/blob/master/src/xsd/xrechnung-semantic-model.xsd

there are test invoices at itplr-kosit too, here https://github.com/itplr-kosit/xrechnung-testsuite/tree/master/src/test/business-cases/standard

test invoices can be sent using process code TDRE0

the gkv documentation refers to "standard" tests for xrechnungs such as the validator. I think the best

[fongie]

according to itpl-kosit it seems like you can send xrechnung both in UN/CEFACT - an european comittee for standardization (or something) - or in UBL - universal business language

bitmarck's example is in UN/CEFACT but UBL certainly looks easier to read. Also, the UBL invoices seem to be using the field names that are in the gkv documentation (InvoiceLine for example - not present in the UN/CEFACT version).

not sure which one to use

[fongie]

more english info here https://invoice-portal.de/en/xrechnung-en/

[fongie]

there is a GS1 standard containing xsds (!) which is based on UN/CEFACT CII - like xrechnung. here https://www.gs1.org/standards/gs1-uncefact-xml-profiles/gs1-un-cefact-xml-cross-industry-invoice/2012 atleast it will make it easier to understand what the non-diga specific elements mean, the pdf has nice descriptions

[fongie]

cross industry invoice schemas referred to in bitmarcks xrechnung bill can be found here! https://github.com/ConnectingEurope/eInvoicing-EN16931/tree/master/cii/schema/D16B%20SCRDM%20(Subset)/coupled%20clm/CII/uncefact/data/standard