During March 2026, Onno Gieling focused on maintaining the Nictiz/HL7-mappings repository, addressing a documentation issue related to XSL versioning. He identified and corrected a typographical error in the XSL file documentation, ensuring that versioning metadata is accurately displayed and aligns with compliance standards. This targeted bug fix, implemented using XSL and leveraging his skills in XML and XSLT, helped reduce confusion for downstream users who rely on precise version information. While no new features were introduced during this period, Onno’s work contributed to the reliability and clarity of the project’s documentation, supporting ongoing maintenance and compliance efforts.