I’m looking into OS support for full-text indexing, for the database engine I 
work on. On Mac OS, there’s SearchKit, which does exactly what I want. iOS 
doesn’t have SearchKit for some reason, but it now has Core Spotlight, which 
lets me index data. The intended use seems to be for device-wide searching in 
the home screen’s search UI. Can I instead use it for my own queries?

iOS does have NSMetadataQuery, for querying Spotlight. Can I use this to search 
only the data I’ve indexed, without results from other apps? And conversely, is 
there a way to keep the data I’ve indexed from showing up in the system-wide 
Spotlight results?

—Jens
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