OLIB has included a MARC21 export for some years. There are ways to enhance and refine the export. As MARC21 is a standards based system the export itself is not configurable – i.e. if data is in a field in OLIB which has a MARC21 equivalent it will be exported as part of a title record. The MARC21 view on the Views sheet of the Bibliographic-Full layout represents the data which will be exported for a specific title. The MARC21 handling functionality of OLIB has been significantly enhanced for the OLIB 9 release and also includes an option to export records in MARC XML format.
This guide assumes some knowledge of the MARC21 format. Please refer to the Library of Congress website for full details and definitions http://www.loc.gov/marc/bibliographic/.