These are sequence numbers. In a single professional shoot, a photographer might take thousands of frames. These numbers help editors identify the exact "best" shot (the "select") from a sequence.
This could represent a specific studio name, a client brand, or a sub-folder designation within a larger archive. i isabella 017 bratdva 062 jpg work
When a string like this is associated with "work," it usually refers to the . A file named i_isabella_017_bratdva_062.jpg is rarely the "raw" image; it is usually the result of several hours of professional labor, including: These are sequence numbers