file-type values in Dock.StaticItem.Tile-data

As per documentation at https://developer.apple.com/documentation/devicemanagement/dock/staticitem/tile-data, file-type is a required field and the possible values are 0, 1, 3. But in the file present on Mac device at ~/Library/preferences/com.apple.dock.plist, the values for file-type are 41, 40, 2, 1, 169.

Can you please help with the valid possible values for the field file-type? And also please help with what each those values mean?

Attached the dock preference file from Mac device.


file-type values in Dock.StaticItem.Tile-data
 
 
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