(registered by RFC 7852) Type name: application Subtype name: EmergencyCallData.Comment+xml Mandatory parameters: N/A Optional parameters: charset (indicates the character encoding of the contents) Encoding considerations: Uses XML, which can contain 8-bit characters, depending on the character encoding. See Section 3.2 of RFC 7303 [RFC7303]. Security considerations: This content type is designed to carry a comment, which is a sub-category of additional data about an emergency call. This data can contain personal information. Appropriate precautions are needed to limit unauthorized access, inappropriate disclosure to third parties, and eavesdropping of this information. Please refer to Sections 9 and 10 for more information. Interoperability considerations: N/A Published specification: RFC 7852 Applications that use this media type: Emergency Services Additional information: Magic Number: N/A File Extension: .xml Macintosh file type code: 'TEXT' Person and email address for further information: Hannes Tschofenig, Hannes.Tschofenig&gmx.net Intended usage: LIMITED USE Author: This specification is a work item of the IETF ECRIT working group, with mailing list address . Change controller: The IESG