AVMetadataKeySpace
A structure that defines a metadata key space.
source: https://developer.apple.com/documentation/avfoundation/avmet...
A structure that defines a metadata key space.
source: https://developer.apple.com/documentation/avfoundation/avmet...
What are you expecting the documentation to say here? It will make more sense when you find where it’s used.
Edit: First link on the bottom explains exactly what it’s used for. https://developer.apple.com/documentation/avfoundation/retri...
There’s plenty of other poorly documented Apple APIs (io_surface), but this isn’t one of them.
Sounds like something that should be mentioned in the opening sentence of https://developer.apple.com/documentation/avfoundation/avmet...
And if you’re reading the documentation because you do development, then you would already know that the header files are installed on your computer and you can trivially verify that there is nothing to document because it’s just a query key.
Going off to read the header file means it isn't documented.