[haiku-development] Re: MIME types.
- From: Ingo Weinhold <ingo_weinhold@xxxxxx>
- To: haiku-development@xxxxxxxxxxxxx
- Date: Thu, 21 Aug 2008 22:37:26 +0200
On 2008-08-21 at 15:29:09 [+0200], Bruno Albuquerque <bga@xxxxxxxxxxxxx>
wrote:
[...]
> 2 - There is no full inheritance from the super-type to the sub-type. It
> is partial in the sense that the icon, for example, is inherited by the
> sub-type from the super-type (if the sub-type does not have its own).
> But this should also extend for other fields like, for example, the
> attribute list. Audio files are a very good example of this. Right now
> if you want to see specific attributes in Tracker for audio/wav and
> audio/mp3 files, you have to add the attributes to both sub-types
> (considering a directory that has only wav or only mp3 files) So you
> would have to add, say, Audio:Title to wav and also to mp3 file types
> while it is obvious that all Audio:* attributes should be assigned to
> the super-type.
>
> For example, we could have something like this:
>
> audio ---------------------------| wav
> | | |
> | | |
> Audio:Title | Audio:WavSpecific1
> Audio:Author | Audio:WavSpecific2
> Audio:AnyGenericAudioAttribute | ...
> ... |
> | mp3
> |
> |
> Audio:Mp3Specific1
> Audio:Mp3Specific2
> ...
Just to throw that in, the relationships between file formats might be even
more complex. Like: text <- XML <- SVG. We could actually try to reflect
that by allowing a type to have an explicit base type (e.g. XML for SVG).
To consequently handle those type hierarchies quite a bit of code would
need to be adjusted though, so it's probably more an R2 thing.
CU, Ingo
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