Swepub
Specifications for metadata delivery in MODS format
Version 4, latest version (pdf): http://www.kb.se/namespace/swepub/mods-format-specification/SWP_MODS_4.pdf
Version 3, previous version (pdf): http://www.kb.se/namespace/swepub/mods-format-specification/SWP_MODS_3.pdf