Face Metadata accessible and/or can it be batch deleted?
On a related note, is it possible to display the named faces in a meta-data field (it appears not). Aperture seems to treat "face" meta-data as a special type of meta-data that isn't accessible. Please tell me that I am wrong!
I think my best option is to export the photos that I don't want to have Face data into a separate library, then delete them from my main library. At least they won't show up when I search Faces in my main library.
That looks like a good idea.
After you export the library with the unwanted "Faces", make a backup of the library. Then try to delete the Faces database inside. quit aperture, if it is running.
Crtl-click (or right click) the library with the Faces.
Select show Package contents.
in the window that opens, delete the folder Database/Faces/ und the file Database/apdb.Faces.db
Close the window. Launch aperture again on the modified library. all Faces should be gone.
Now delete the project with the unwnted faces from your main library and import the library without faces.
The Faces folder