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The e-invoices format ZUGFeRD 2.2 is supported (downgraded implemented for 8.16 LTS as well).
Plug-in capability: The service can easily be extended with custom plug-ins if data of other formats than the supported ones need to be extracted, e.g., keys from 7z archive files as supported for zip-ones, or to extract x-invoice (XRechnung).
See documentation: Extending the Extraction-Service Using Plug-ins
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