"The duration of the item (movie, audio recording, event, etc.) in ISO 8601 date format."^^ . . . . . . "duration"^^ . . . "The duration of the item (movie, audio recording, event, etc.) in ISO 8601 date format."^^ . "duration" . "The duration of the item (movie, audio recording, event, etc.) in ISO 8601 date format." . . . "duration"^^ .