For this Common Form ...
... an annotation might be ...
Levels
"info"
denotes annotations that provide additional information or suggestions, such as to flag an archaism in form text.
"warn"
denotes annotations that indicate possible oversights, such as notice that a fill-in-the-blank has not been filled in.
"error"
denotes structural or other significant faults in a form, such as uses of terms that aren't defined.