Mapping fields in csvImport

This may be silly or obvious, but if I want Omeka to auto-map my fields from my csv file, how do I format the field names?

DublinCore:Creator
{DublinCore}:{Creator}
{DC}:{Creator}
DC:Creator

Or some other way? The example on the Step 1: Select File and Item Settings is not clear.

Thanks!
Amy

There's an example in the csv_files folder. It goes like this:

Dublin Core:Title, Dublin Core:Creator, Dublin Core:Description, tags, Item Type Metadata:URL

Next question with an obvious answer, probably.

Where is the csv_files folder?

in the top of the CSVImport plugin folder. If Omeka is installed in a directory called 'root', it would be in root/plugins/CSVImport