(RFC 5537 published November 2009, subtype last updated November 2009) MIME type name: application MIME subtype name: news-groupinfo Required parameters: none Optional parameters: charset, which MUST be a charset registered for use with MIME text types. It has the same syntax as the parameter defined for text/plain [RFC2046]. Specifies the charset of the body part. If not given, the charset defaults to US-ASCII [ASCII]. Encoding considerations: 7bit or 8bit encoding MUST be used to maintain compatibility. Security considerations: None. Interoperability considerations: Disposition should by default be inline. Applications that use this media type: Control message issuers, relaying agents, serving agents. Published specification: RFC 5537 Intended usage: COMMON Change controller: IETF The content of the application/news-groupinfo body part is defined as: groupinfo-body = [ newsgroups-tag CRLF ] newsgroups-line CRLF newsgroups-tag = %x46.6F.72 SP %x79.6F.75.72 SP %x6E.65.77.73.67.72.6F.75.70.73 SP %x66.69.6C.65.3A ; case sensitive ; "For your newsgroups file:" newsgroups-line = newsgroup-name [ 1*HTAB newsgroup-description ] [ *WSP moderation-flag ] newsgroup-description = eightbit-utext *( *WSP eightbit-utext ) moderation-flag = SP "(" %x4D.6F.64.65.72.61.74.65.64 ")" ; SPACE + case sensitive "(Moderated)" eightbit-utext = VCHAR / %d127-255 This unusual format is backward-compatible with the scanning of the body of newgroup control messages for descriptions done by Netnews implementations that predate this specification. Although optional, the SHOULD be included for backward compatibility. The MUST NOT contain any occurrence of the string "(Moderated)" within it. Moderated newsgroups MUST be marked by appending the case-sensitive text " (Moderated)" at the end. While a charset parameter is defined for this media type, most existing software does not understand MIME header fields or correctly handle descriptions in a variety of charsets. Using a charset of US- ASCII where possible is therefore RECOMMENDED; if not possible, UTF-8 [RFC3629] SHOULD be used. Regardless of the charset used, the constraints of the above grammar MUST be met and the MUST be represented in that charset using the same octets as would be used with a charset of US-ASCII.