: A specific content alphanumeric identifier, commonly assigned to individual inventory items, broadcast tapes, or digital assets in East Asian multimedia networks.

: An industry-standard tag indicating English Subtitles . This flag alerts downstream multiplexers and video players that an English subtitle track must be burned into the container or layered as an external text file.

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Frame indexing or millisecond positioning (e.g., 02 hours, 41 minutes, 20 seconds) where a file split or audio-sync normalization occurred.