<Li> MR = Meet Record </Li> <Li> DLR = Diamond League Record </Li> <P> When a J is added, it indicates a junior record (if a junior does not reach their 20th birthday in the calendar year of the mark) </P> <Ul> <Li> WJR = World Junior Record </Li> <Li> AJR = Area (or continental) Junior Record </Li> <Li> NJR = National Junior Record (for a specific country) </Li> <Li> #= indicates a record has not been accepted, or there is some sort of irregularity with a result </Li> <Li> X = indicates the athlete has been disqualified after the performance (usually, this is for taking performance - enhancing drugs) </Li> </Ul>

What does j mean in track and field