Codelists from the Metadata for Resource Distribution (mrd) Namespace Codelists from the Metadata for Resource Distribution (mrd) Namespace ISO TC211 Metadata Standards 0.1 2017-09-10 eng UTF-8 MD_MediumFormatCode MD_MediumFormatCode method used to write to the medium method used to write to the medium cpio cpio Copy In / Out (UNIX file format and command) Copy In / Out (UNIX file format and command) tar tar Tape Archive Tape Archive highSierra highSierra high sierra file system high sierra file system iso9660 iso9660 information processing volume and file structure of CD-ROM information processing volume and file structure of CD-ROM iso9660RockRidge iso9660RockRidge rock ridge interchange protocol (UNIX) rock ridge interchange protocol (UNIX) iso9660AppleHFS iso9660AppleHFS hierarchical file system (Macintosh) hierarchical file system (Macintosh) udf udf universal disk format universal disk format