(registered 2025-03-18, last updated 2025-03-18)

Media type name: application

Media subtype name: did

Required parameters: None

Optional parameters: None

Encoding considerations: binary

Security considerations: https://www.w3.org/TR/did/upcoming/#security-considerations

Interoperability considerations: https://www.w3.org/TR/did/upcoming/#conformance

Published specification: https://www.w3.org/TR/did/

A maintenance release is under way and is expected to be published at the URL above once the maintenance release work is complete. The maintenance release does not add/remove any features:

https://www.w3.org/TR/did/upcoming/

Applications which use this media: https://www.w3.org/TR/did-use-cases/#uc

Fragment identifier considerations: https://www.w3.org/TR/did/upcoming/#fragment

Restrictions on usage: None

Additional information:

1. Deprecated alias names for this type: Not Applicable
2. Magic number(s): Not Applicable
3. File extension(s): .did
4. Macintosh file type code: TEXT
5. Object Identifiers: Not Applicable

General Comments: This request is a long overdue registration request for the Decentralized Identifiers specification, whose initial 1.0 version reached W3C Recommendation status on July 19th, 2022 (more than two and a half years ago).

The media type was not registered at that time because of a Media Types with Multiple Suffixes decision that needed to be made by the IETF MEDIAMAN WG at the time. Now that the decision has been made (to not support media types with multiple suffixes), the W3C DID WG has a clear path to registering the media type that the group has resolved will cover v1.0, v1.1, and future versions of the specification: application/did.

Person to contact for further information:

1. Name: W3C Decentralized Identifiers Working Group
2. Email: public-did-wg&w3.org

Intended usage: COMMON

Author/Change controller: W3C