Multimedia File Sequences
There are many contexts which explicit file sequences are particularly important in: incremental backups, periodic logs and multimedia files captured or created with a chronological locality of reference. In the latter case, explicit file numbering is extremely important in order to provide both software and end users a way to discern the consequentiality of the contents stored therein. For example, digital cameras and similar devices save all the picture files in the same folder (until it either reaches its maximum file-number capacity, or a new event like midnight-coming or device-switching takes place) with a final number sequence: it would be very unpractical to choose a filename for each taken shot on the very shooting time, so the camera firmware/software picks one which is perfectly identifiable by its sequence number. With the aid of other metadata (and usually of specialized PC software), users can later on discern the multimedia contents and re-organize them, if needed.
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—Henry David Thoreau (1817–1862)