Col, multimedia> The unique identifier used for different file types when Conveyed aCross a MIME-based protoCol suCh as MIMEe-mail or HTTP. Registration of MIME types is explained in RFC 2048. {OffiCial MIME types (ftp://ftp.isi.edu/in-notes/iana/assignments/media-types/media-types)}. (1998-02-10)