MODS (Metadata Object Description Schema) to MARC (Machine-Readable Cataloging)

This document is intended for use in first converting a MODS record to MARCXML and then to a MARC 21 (ISO 2709) record. MARC 21 includes many more data elements than MODS, so although this mapping suggests a single MARC 21 equivalent for each MODS element, there may be other equivalents that are more appropriate for particular pieces of information. Additionally, MARC 21 is more granular than MODS so some data may map to inappropriate MARC 21 fields or subfields. Consequently, some conversions will result in some loss of data identification.

Links and documentation

Responsible people and organizations


Internal MSC ID

Version history


version 2015