(registered 2026-07-10, last updated 2026-07-10)

Scheme name: 
mdoc

Status: 
Provisional

Applications/Protocols That Use This Scheme:
The mdoc scheme is used for presentment of mdoc mobile document, as defined in ISO/IEC 18013-5, ISO/IEC 18013-7 and defined in the ISO/IEC 23220 standards series.

Contact:
https://www.iso.org/committee/45144.html

Organization:
ISO/IEC JTC 1/SC 17/WG 10

Author/Change Controller:
Same as Contact.

References:
The scheme is proposed as part of ISO/IEC 18013-5:2021 and  in ISO/IEC 18013-7:2025.

Scheme syntax:
Defined in ISO/IEC 18013-5:2021 clause 8.2.2.3 and ISO/IEC 18013-7:2025 annex A.4

As defined in those sections, the mdoc scheme has the following syntax:

For use in in-person presentment using a QR code:

mdoc:<DeviceEngagement>
<DeviceEngagement>: The DeviceEngagement structure as defined in ISO/IEC 18013-5 encoded as Base64URL-without-padding

For use in online presentment using a URI scheme:

mdoc://<ReaderEngagement>
<ReaderEngagement>: The ReaderEngagement structure as defined in ISO/IEC 18013-7 encoded as Base64URL-without-padding

Security considerations:
The DeviceEngagement and ReaderEngagement structures contain the information necessary to perform the engagement flow and secure the subsequent transaction. For details on the security mechanism used, see the revenant sections in ISO/IEC 18013-5 and ISO/IEC 18013-7 with the security mechanism and security considerations.

Example:
mdoc:owBjMS4wAYIB2BhYS6QBAiABIVggWojRgrzl9C76WZQ_MzWdLoqWj_KJ2T5fpES2JDQxZ_4iWCCxboz4WN3HaQQHumHUwzgjeoz8895qpnL8YKVXqjL8ZwKBgwIBowD0AfULUEXv73QrLEg3qaOw4dBaaRc