(registered 2026-04-10, last updated 2026-04-10)

Media type name: application

Media subtype name: vnd.cmmf-efd+xml

Required parameters: None

Optional parameters: None

Encoding considerations: binary

UTF-8

Security considerations: The EFD contains references to other resources. It is coded in XML, and there are risks that deliberately malformed XML can cause security issues. In addition, an EFD can be authored that causes receiving clients to access other resources; if widely distributed, this can be used to cause a denial of service attack.

The EFD format does not incorporate any active or executable content. However, other forms of material from outside sources can be referenced by an EFD, and this material can contain active or executable content. Such material is expected to be identified by its own MIME type, and the security considerations of that format should be taken into account.

If operating in an insecure environment and required by the content/service provider, elements and attributes of EFD may be encrypted to protect their confidentiality by using the syntax and processing rules specified in the W3C Recommendation "XML Encryption Syntax and Processing".

If operating in an insecure environment and required by the content/service provider, the digital signing and verification procedures specified in the W3C Recommendation "XML Signature Syntax and Processing" may be used to protect data origin authenticity and integrity of the EFD

Interoperability considerations: The present document defines a platform-independent expression of a document, and it is intended that wide interoperability can be achieved

Published specification: ETSI TS 103 973

Applications which use this media type: The EFD may be used by CMMF Receivers, either stand-alone or embedded within other applications, to provide necessary configuration information to identify, locate, and recover media resources from CMMF bitstreams/Transport Objects.

Fragment identifier considerations: None

Restrictions on usage: None

Additional information:

1. Deprecated alias names for this type: N/A
2. Magic number(s): N/A
3. File extension(s): efd
4. Macintosh file type code: N/A
5. Object Identifiers: N/A

Person to contact for further information:

1. Name: Jason Cloud
2. Email: jason.cloud&dolby.com

Intended usage: COMMON

Author/Change controller: ETSI