File Name Extension Descriptions

Extension	MIME	Target Content	Description
.wma	audio/x-ms-wma	Audio content typically used to download and play files or to stream content.	Audio: mandatory in authoring; mandatory for rendering; uncompressed, Windows Media audio or ACELP.net. Video: none Script: optional in authoring; mandatory for rendering DRM: optional in authoring; mandatory for rendering
.wmv	video/x-ms-wmv	Audio/video content typically used to download and play files or to stream content.	Audio: mandatory in authoring; mandatory for rendering; uncompressed, Windows Media audio or ACELP.net. Video: mandatory in authoring; mandatory for rendering; uncompressed, or MPEG-4 Script: optional in authoring; mandatory for rendering DRM: optional in authoring; mandatory for rendering
.asf	video/x-ms-asf	Legacy content.	Audio: mandatory in authoring; mandatory for rendering; uncompressed, Windows Media audio, ACELP.net, MPEG-3, or other codec. Video: mandatory in authoring; mandatory in rendering; uncompressed, MPEG-4, TrueMotion RT, or ClearVideo Script: optional in authoring; mandatory for rendering DRM: optional in authoring; mandatory for rendering Note: Application has unbounded rendering requirements
.wm	video/x-ms-wm	Reserved	Reserved
.wax	audio/x-ms-wax	Metafiles that reference Windows Media files with the .wma or .wax file extensions	See the Windows Media Metafile Elements Reference below.
.wvx	video/x-ms-wvx	Metafiles that reference Windows Media files with the .wma, .wmv, .wvx or .wax file extensions	See the Windows Media Metafile Elements Reference below.
.asx	video/x-ms-wvx	Metafiles that reference Windows Media files with the .wma, .wax, .wmv, .wvx, .asf, or .asx file extensions	See the Windows Media Metafile Elements Reference below.
.wmx	video/x-ms-wvx	Reserved	Reserved

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