Presentation for the LITA/ALCTS MARC Transition Interest Group, ALA Midwinter, Seattle, January 2013. Abstract: Many of those who seek to map or crosswalk data from MARC to other schemas believe that the elderly MARCXML is the only option. However, another option exists, in a more modern package: http://marc21rdf.info. These
'level zero' elements allow MARC21 data to be represented without loss in RDF; subsequently, semantic mappings can be used to interoperate the data with other linked data based on Dublin Core, ISBD, RDA, etc. This resource is open to use by anyone, and will be available in the mapping service beingbuilt by the Open Metadata Registry (http://metadataregistry.org).