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XRechnung Schematron

Technical implementation of the German CIUS (XRechnung) business rules for EN16931:2017 as Schematron Rules for XML validation.

If you think you have found a bug, please contact us.

Existing issues can be found at our issue tracker.

You can find packaged releases on our GitLab project.

Semantic Versioning

Since December 2018 we introduced Semantic Versioning.

Given a version number MAJOR.MINOR.PATCH, we increment the:

  1. MAJOR version when we make incompatible changes:
    • That is we introduce changes to the rules which will DEFINITELY not validate previously generated XML which was valid to previous major version anymore
  2. MINOR version when we add functionality
    • That is we introduce changes to the rules which widen the scope of valid content (e.g. we add new codelist terms or accept new optional XML elements).
    • CAUTION: This might break YOUR validation scenario and ability to accept XML content
  3. PATCH version when we make backwards-compatible bug fixes.


The development takes place in an internal repository. Please contact

Entwicklung / Development

Further information on development may be found in our Developer Documentation