Table 7 Validity codes.
Data issue | Examples | Value code | flag |
|---|---|---|---|
Missing | Blank, “, -, “not taken”, “none”,”suspended”,”absent on duty” | −999 | “missing” |
Instrument error | “out of order”, “broken”, “unserviceable”, “covered with snow”, “not reliable” | −999 | “Instrument error” |
illegible | Ink blot, page tear, microfilm cut-off | −999 | “illegible” |
