2010-06-21 12:07:38 PDT
'DOI' does not appear in the RIS specification, so refbase does not have a separate field for it. Refbase will take URIs that are really DOIs & place them in the DOI field. So, you can, e.g. export as:
UR - http://dx.doi.org/10.1000/182Alternatively, you can modify includes/import.inc.php to use a site-specific RIS field for DOIs (an example is commented out in the source).