Publications

The European Digital Identity (EUDI) Wallet ecosystem transforms how identities and credentials are managed and verified across Europe. Central to this transformation is the Digital Credential Query Language (DCQL), a JSON-based language designed to standardise and streamline the querying of verifiable credentials. Download the whitepaper to explore the role of DCQL in enhancing interoperability, privacy, and security within the EUDI Wallet framework.

A Relying Party (RP) admin can construct queries based on one or more query objects, offering rich control over how credentials are selected and combined during a presentation request. By enabling verifiers to specify precise requirements for credential attributes, DCQL ensures that users share only the data they need to, thereby preserving privacy while facilitating efficient and secure transactions.

Through real-world use cases, such as those from the Bank of Transilvania and Fast Ferries, the whitepaper demonstrates how DCQL simplifies the credential verification process, improving user experience and operational efficiency.

As a key component of the EUDI Wallet ecosystem, DCQL is poised to become a critical enabler of cross-border, secure, and privacy-respecting digital identity management in Europe.