# AF-0047

Source: https://xmlvalid.com/rules/AF-0047

> Der angegebene Wert ist ungültig. Das angegebene bis-Datum (…) muss nach dem von-Datum (…) sein.

- Level: error
- Rule sets: e-Rechnung.gv.at checks (ebInterface) Fehlerliste, October 2026
- Context: `/*:Invoice/*:Delivery | /*:Invoice/*:Details/*:ItemList/*:ListLineItem/*:Delivery`
- Test: `not(*:Period) or xs:date(*:Period/*:ToDate) ge xs:date(*:Period/*:FromDate)`

In English: The end of the delivery period is before its start.

Validate a document against these rules: https://xmlvalid.com/validate