Wisdom.Flag
A Flag is a "constant" value used to represent some choice amongst or between a set. In some cases, wisdom modules make use of flags implemented as object references, and in other cases as numeric values that can be compared in bitwise fashion.
For an example of the first type (object reference) see wisdom.ui.SlidingPanel.interpolation, and for an example of the second see the upcoming optimizations for wisdom.ui.Sprite.
See also
This is part of the Reference Documentation for the Wisdom Javascript Library? (or wisdom.js)