It's not a format :) It's simpliy about linking metadata from a json to a corresponding image or video file, like pairing data003.png & data003.json to a singl

It's not a format :) It's simpliy about linking metadata from a json to a corresponding image or video file, like pairing data003.png & data003.json to a single, virtual record. Some format use this approach: open-image or laion datasets.