The labels are divided into three sections:
- Original COCO paper
- COCO dataset release in 2014
- COCO dataset release in 2017
Since the labels for COCO datasets released in 2014 and 2017 were the same, they were merged into a single file. The file name should be self-explanatory in determining the publication type of the labels.
More elaboration about COCO dataset labels can be found in this article