These are referenced in the framework guidance (which is iterative) intended for DVSs. Here for instance: https://www.gov.uk/government/publications/uk-digital

These are referenced in the framework guidance (which is iterative) intended for DVSs. Here for instance: https://www.gov.uk/government/publications/uk-digital-identity-attributes-trust-framework-updated-version/uk-digital-identity-and-attributes-trust-framework-alpha-version-2 https://www.gov.uk/government/publications/uk-digital-identi... If you want a technical explanation of how they work, you will need to loose elsewhere.