> yesterday, I have implemented a feature that has been awaited for a
> very long time: the sticker database. It is a database where you can
> attach additional information (name/value pairs) to objects, e.g. to
> song files.
This last "e.g." seems to imply that songs are but one of the possible
places where you can attach info. But doc/sticker.xml doesn't mention
any other place.
The problem with "per-song name/value pairs" is that it doesn't provide
any more functionality than tags stored directly inside the song files.
Or rather, the only extra functionality is that you can change them via
the MPD protocol.
So maybe a better feature would be to make it possible to change the
meta-info of files directly via the MPD protocol.
Then again, maybe not. E.g. the functionality currently offered is not
sufficient to provide per-user song ratings and making it possible to
write the song's metadata wouldn't solve that either.
W.r.t the "style" sticker, maybe a better solution would be to use
"genre" for that, and then provide a way to classify genres.
The classification hierarchy (probably a DAG actually) could be stored
in some extension of the sticker database (where the info is clearly
not per-song any more).
Along similar lines, the album_rating shouldn't be stored "per-song".
Instead, each song should contain some "album id", and then the album's
data can be associated with that album id. This would allow to
distinguish between the song's date and the album's date (for
compilation albums), would provide a good place to store album covers as
well, etc...
I'm not sure what "album ids" should look like, but in my music
collection, each album has its own directory, so if it's a common usage
pattern, that could be a good solution.
Stefan
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