mime types and video/audio files (was Re: Review of the thumbnailer spec)

[Brian J. Tarricone]

A. Walton wrote:

> Just as a note, this is precisely the rationale behind "Uniform Type
> Identifiers", which support multiple inheritance and uses the
> currently-in-vogue reverse DNS naming scheme (e.g. you can have types
> like "com.my-media-encoder-company.complex-video-type" conform to
> org.xiph.vorbis, com.bbc.dirac, org.xiph.ogg-kate,
> org.xiph.ogg-container,  public.utf8-plain-text, public.movie,
> public.video,  public.plain-text, public.audiovisual-content,
> public.composite-content, public.content, and public.data in a tree
> structure which should be rather deducible from the order they are
> given here).

Is a single file allowed to have multiple UTIs?  A mkv file might have 
*all* of org.matroska.mkv-container, org.xiph.theora, org.xiph.vorbis, 
and com.dolby.ac3, for example.

	-brian