One pool length as the watch logged it: a swum length, or a rest at the wall (active: false, no strokes).
active: false
ISO 8601, UTC — when the length (or rest) began.
Optional
The stroke the watch recognised (FIT's names: freestyle, breaststroke, backstroke, butterfly, drill, mixed).
Strokes taken over the length.
One pool length as the watch logged it: a swum length, or a rest at the wall (
active: false, no strokes).