The function measures the length of variable names ("varNames_length"
, maximum of 64 characters)
variable labels ("varLabels"
, maximum of 256 characters),
value labels ("valLabels"
, maximum of 120 characters). Furthermore,
missing codes are counted ("missings"
, maximum of three missing codes for character variables)
and special characters are flagged in variable names ("varNames_special"
).
Check results are reported back on variable level, with the exception of "valLabels"
, which is a list
with entries per violating variable.