(registered 2022-09-05, last updated 2022-09-05) Media type name: application Media subtype name: vnd.3gpp-prose-pc3ach+xml Required parameters: None Optional parameters: "charset" The parameter has identical semantics to the charset parameter of the "application/xml" media type as specified in section 9.1 of IETF RFC 7303. Encoding considerations: binary The media type encodes parameters to manage group affiliation as specified in 3GPP TS 24.554 Security considerations: Same as general security considerations for application/xml media type as specified in section 9.1 of IETF RFC 7303. The information transported in this media type does not include active or executable content. Mechanisms for privacy and integrity protection of protocol parameters exist. Those mechanisms as well as authentication and further security mechanisms are described in 3GPP TS 33.503. This media type does not include provisions for directives that institute actions on a recipient's files or other resources. This media type does not include provisions for directives that institute actions that, while not directly harmful to the recipient, may result in disclosure of information that either facilitates a subsequent attack or else violates a recipient's privacy in any way. This media type does not employ compression. Interoperability considerations: Same as general interoperability considerations for application/xml media type as specified in section 9.1 of IETF RFC 7303. Any unknown XML elements and any unknown XML attributes are to be ignored by recipient of the MIME body. The media type allows for interoperability of messages transmitted for 5G ProSe over the PC3ach interface. The messages are sent between user equipment and mobile network. Published specification: 3GPP TS 24.554 " Proximity-services (ProSe) in 5G System (5GS) protocol aspects" available at http://www.3gpp.org/ftp/Specs/html-info/24554.htm Applications which use this media: Applications supporting 5G proximity service procedures as described in the 3GPP TS 24.554. Fragment identifier considerations: The handling in section 5 of IETF RFC 7303 applies. 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): N/A 4. Macintosh file type code: N/A 5. Object Identifiers: N/A General Comments: Person to contact for further information: 1. Name: Haorui Yang 2. Email: yanghaorui&oppo.com Intended usage: COMMON The media type is intended to be widely used by mobile devices for 5G proximity service procedures. Author/Change controller: Author/Change controller: 3GPP 3GPP contact: Lionel Morand