MARC to MODS
MARC to METS
MARC to VRA Core
DC to MARC
DC to MODS
DC to METS
DC to VRA Core
MODS to MARC
MODS to DC
MODS to METS
MODS to VRA Core
METS to MARC
METS to DC
METS to MODS
METS to VRA Core
VRA Core to MARC
VRA Core to DC
VRA Core to MODS
VRA Core to METS
XML
https://www.loc.gov/standards/mads/
http://www.ala.org/aasl/standards/crosswalk
https://www2.archivists.org/standards/DACS/appendices/appendix_c_crosswalks
Dewey/LC mapping http://guide.unwsp.edu/c.php?g=57327&p=367920
BIBFRAME
OAI-PMH
CDWA
ONIX