CEN/TS 16931-13:2026

This document defines the purpose, governance and functional requirements of the eInvoicing Registry for CIUS and Extension Specifications. This document is not to be confused with other business / project focused Technical Specifications. It follows CEN rules and will be published as a CEN document with normative statements.
A key part of this document is to provide a functional specification, which will describe the various functions of eInvoice Registry Services.
The Registry is intended to serve as a structured, transparent and publicly accessible repository that facilitates the discovery, registration and management of eInvoicing Specifications that either restrict the conditional elements of the Core Invoice Model and/or extend it in conformance with Part 5 Extension Methodology.
The scope of this document includes:
— Definition of Registry Services – the structure and capabilities of the Registry including the types of artefacts it stores or references, e.g. CIUS, Extension Specifications, Validation Artefacts and Services, and Code Lists;
— Governance Model – the roles and responsibilities of entities involved in managing and maintaining the Registry;
— Submission and Verification Processes – how Specifications are submitted, reviewed and verified for inclusion in the Registry;
— Functional Specification – the required functionality, processes and procedures that enable the Registry to operate efficiently.