691 Advanced Systems Format ASF Audio, Image (Raster), Video Full The Advanced Systems Format is an extensible file format developed by Microsoft for storing multimedia data streams. It comprises a Header Object, which describes the properties of the data streams, a Data Object, which contains the actual data streams stored in Data Packets and, optionally, one or more Index Objects. ASF files can contain audio, video and still image data streams, and the format supports streaming across networks. ASF supports a variety of audio, video and still image compression types, although it is most widely used for storing Windows Media Audio and Video encoded data. Binary Little-endian (Intel) 01 Nov 2004 1 Digital Preservation Department / The National Archives 11 Mar 2005 02 Aug 2005 application/vnd.ms-asf MIME com.microsoft.advanced-systems-format Apple Uniform Type Identifier fmt/131 PUID asf File extension 80 Advanced Systems Format Header Object 1 Absolute from BOF 0 3026B2758E66CF11A6D900AA0062CE6C{12}0102 Has lower priority than 692 Windows Media Audio Has lower priority than 693 Windows Media Video Has lower priority than 1228 Windows Media Video (WVC1) Is supertype of 692 Windows Media Audio Is supertype of 693 Windows Media Video