Metadata Object Description Schema
n. (abbr. MODS)
an Extensible Markup Language (XML) schema for a descriptive bibliographic element set
MODS was created in 2002 and is maintained by the Network Development and MARC Standards Office of the Library of Congress. The schema was designed for multiple purposes, one of which is digital library applications.
MODS serves several purposes, including describing and providing access to digital objects through both original description and also existing MARC 21 fields which have been crosswalked to MODS. Other schemas, including Dublin Core and EAD, can be crosswalked to and from MODS.
MODS tags are language based, whereas MARC employs numeric tags. Unlike MARC, MODS does not use field and subfield tagging.