Denmark OIOUBL 2.1 Schematron Version 1.16.0.RC Released –
A Step Toward Environmentally Responsible E-Invoicing

The Danish Business Authority (Erhvervsstyrelsen) has released OIOUBL Schematron version 1.16.0.RC for OIOUBL 2.1 as a Release Candidate.

Overview of the Update

This update introduces two new validation checks to enhance data quality and validity, along with support for CO₂ data in e-invoices.
This marks an important step toward combining financial accuracy with environmental responsibility.

From now on, e-invoices can include data on CO₂ emissions generated during the production, transportation, or delivery of goods and services.
This allows companies to make their environmental impact transparent, supporting sustainability and ESG reporting initiatives.

CO₂ information can be included either:

• At the invoice level, showing the total emissions for the entire document, or
• At the line-item level, indicating emissions per product or service.

While the inclusion of such data is optional, the schematron will validate its structure and correctness if used.

For detailed documentation, visit:

OIOUBL Billing with Response – Environmental Data in the Invoice

Additional Technical Updates

• Reinforced validation ensures that all amounts have a valid currency code a rule that now becomes fully schematron-enforced.

Additional Resources

• Changelog: Changelog – OIOUBL Schematron 1.16.0.RC
• Download: OIOUBL Schematron 2025-10-14 v1.16.0.RC

Timeline and Migration

• Version 1.16.0.RC is currently available as a release candidate.
• The final release is expected by the end of October 2025.
• If no significant feedback arises, the implementation deadline will be 27 November 2025.

https://nemhandel.dk/oioubl-21-schematron-version-1160rc