TS11 explained: the EUDI catalogue of Attestation Rulebooks and attributes
TS11 is the European Commission specification, current version v1.0.1 (2026-01), behind two EU registries: one that records what an individual piece of information means, and one that records what a credential type contains. Together they are what lets an organisation in one member state recognise a credential issued in another.
The problem TS11 solves
An organisation receives a credential and has to decide whether to accept it. That starts with knowing what kind of credential it is: what it says, who is allowed to issue it, and how much assurance it carries. Without a shared register that knowledge sits in scattered documents and sector registries, so every new credential type turns into a separate project, agreed one counterparty at a time.
TS11 answers that with two registries the European Commission is required to set up and run. The catalogue of Attestation Rulebooks holds one entry per credential type, so an organisation that receives an unfamiliar credential can look up what it is and what it should contain. The catalogue of attributes does the same one level down, recording what a single piece of information means and which official register holds the authoritative value. An issuer registers once, and every wallet and every organisation in the EU can recognise the type without contacting it.
The two catalogues
Catalogue of attributes
An EU-wide register of what individual pieces of information mean. Each entry records the name of the attribute, a plain description, the legal basis for collecting it, and the official registers that hold the authoritative value. Member states and those official registers are the ones who add entries.
Catalogue of Attestation Rulebooks
An index of credential types. Each entry points at the rulebook for that type and at the definition of what a credential of that type should contain. Issuers register their types here so that anyone receiving one can look up what it is and decide whether to rely on it.
These are distinct registries with distinct purposes. Conflating them is the most common mistake when reading TS11 for the first time.
| Dimension | Catalogue of attributes | Catalogue of Attestation Rulebooks |
|---|---|---|
| What it describes | Single pieces of information: what the term means and who holds the official value | Whole credential types: what they contain, who may issue them and how much assurance they carry |
| Who registers | Member states and the official registers that hold the data | Issuers, through the European Commission |
| Source of truth | The Commission catalogue, backed by national registers | The Commission catalogue, plus the public repository that holds the written rulebooks |
The rulebook and the catalogue entry
An Attestation Rulebook is a written document, published openly, that sets out everything about one credential type. The catalogue entry is the short index card that points at it. Software reads the index card; people read the rulebook.
Attestation Rulebooks on GitHub
Current state (2026-09)
- The written catalogue is live. The Commission runs it as a public repository, which currently holds two rulebooks, one for the mobile driving licence and one for the PID, alongside the template for writing new ones.
github.com/eu-digital-identity-wallet/eudi-doc-attestation-rulebooks-catalog - The catalogue of attributes does not exist yet in the form TS11 describes. It is meant to sit on Commission infrastructure that already runs, the Single Digital Gateway and the OOTS Semantic Repository, but what that repository publishes today is something different.
sr.oots.tech.ec.europa.eu - The catalogue of Attestation Rulebooks that software would query is specified but not yet running. No address has been published for it, and the rules for who may change an entry are left to a later version of the specification.
One implementation is already in the field: the SIROS Foundation runs a public registry that publishes Attestation Rulebooks the way TS11 describes, which is a useful place to see how it works in practice. registry.siros.org
WE BUILD, the EU large-scale pilot for the construction sector, publishes its credential types in that registry under its own namespace. registry.siros.org/webuild-consortium
ETSI succession: EN 319 482-3
ETSI is developing EN 319 482-3 on the basis of TS11, with an expected publication date of 2027-10-31. When it is published it becomes the permanent European standard for both catalogues. TS11 is the interim text, so plans that depend on it should leave room to absorb changes when the ETSI standard lands.
What this means for you
Issuer
Register your credential type once and it becomes recognisable across the EU, instead of explaining it to every counterparty separately.
Verifier
You can accept credential types you have never seen before, because the catalogue tells your systems what they are and what they should contain.
Public body
Your registers become the named source for the attributes you already hold, so other organisations stop collecting the same data themselves.
Technical deep dive
This page explains what the technology does and who it affects. Our developer documentation covers the implementation itself: the messages, the fields and the worked examples an integration team needs.
Read the technical documentationRelated terms
Frequently asked questions
What is the difference between the two catalogues?
The catalogue of attributes describes single pieces of information, such as a family name or a company registration number: what the term means, who is legally allowed to collect it, and which official register holds the authoritative value. The catalogue of Attestation Rulebooks describes whole credential types: what a diploma or a company registration credential contains and how much assurance it carries. They are separate registries with separate purposes, and an issuer registers in the second one.
Do I have to register my credential type?
Registering in the catalogue of Attestation Rulebooks is what makes your credential type recognisable across the EUDI Wallet ecosystem. An organisation that receives a credential of an unregistered type has no official place to look up what it means, so it will not know whether it can rely on it. Registration runs through European Commission infrastructure and is not self-service.
What replaces TS11?
ETSI is developing EN 319 482-3 on the basis of TS11, with an expected publication date of 2027-10-31. When that standard is published it becomes the permanent European standard. TS11 as written is an interim Commission specification, so anything built on it today should be reviewed against the ETSI text once it is final.
How does a verifier find out what a credential it received means?
The credential names its own type, and the catalogue turns that name into the rulebook for the type and the definition of what it should contain. The verifier reads both automatically, so an organisation can accept a credential type it has never seen before without first negotiating with the issuer.
Sources
This page is informational and does not constitute legal advice. For authoritative guidance consult the European Commission and ETSI directly.