http://www.rfc-editor.org/rfc/rfc6266.txt
RFC 6266: Use of the Content-Disposition Header Field in the Hypertext Transfer Protocol (HTTP), J. Reschke2011-06-01T23:00:00-00:00RFC 2616 defines the Content-Disposition response header field, but points out that it is not part of the HTTP/1.1 Standard. This specification takes over the definition and registration of Content-Disposition, as used in HTTP, and clarifies internationalization aspects. [STANDARDS-TRACK]