docs(validations): a date formatted column takes no special missing

2026-09-23 15:38:37 +00:00
parent abf01d6375
commit 1a5cea9ebe
1 changed files with 2 additions and 0 deletions
@@ -49,6 +49,8 @@ Check back frequently as we keep growing this list of checks.  For how each rule

 A SAS numeric variable has 28 missing values: the regular `.` and 27 special ones (`.A`-`.Z` and `._`).  Data Controller accepts them in a numeric cell as a bare letter - `a` to `z`, or `_`, with no period - and stores the matching special missing in SAS.

+A numeric column that carries a date, datetime or time format is the exception.  Those cells are edited through a date picker rather than the numeric editor, and the picker accepts only a date - so a special missing cannot be typed into one of them.
+
 The rules treat a special missing as a value for some checks and as a missing value for others:

 |Rule|What happens to a special missing|