I imported some data from the Smithsonian Collection. I downloaded a CSV from the collection and then arranged columns to match BD. However, I failed to notice some errors in the date field. Here is how BD processes this data:
No date – is processed as current date
1888 – is processed as 3/2/1905
Sep 1880 – is processed as 9/1/1880 (which is probably okay, but I would have chosen 9/15/1880)
(Dec 18--) – the entire record is skipped
While obviously I should be more careful about what I am entering (garbage in – garbage out) I think BD could be a bit more helpful. First of all, none of these data errors were mentioned in the report file. It seems at the very least BD should put a message in the report file if it skips a record. More helpful would be that it prompts the user if the data is incomplete.
If you would like to test this yourself, I have attached a CSV file that includes some of the records with bad date fields.