This is the original "full" version of the instrument, consisting of 42 items (14 items per subscale).
A popular 21-item version where scores are doubled to maintain comparability with the full 42-item scale. dass284 full
Specialized platforms like Iteman (Classical Test Theory) or Xcalibre (Item Response Theory) use such identifiers to manage specific data sets or scoring algorithms. This is the original "full" version of the