The files in this directory are part of the Unicode Character Database for version 11.0.0 of the Unicode standard. The full set of UCD files are not distributed with e2fsprogs, since they are very large and only needed to regenerate the lib/ext2fs/utf8data.h during an Unicode version update. They can be found in the link below and also in the Linux kernel source tree: http://www.unicode.org/Public/11.0.0/ucd/ The latest released version of the UCD can be found here: http://www.unicode.org/Public/UCD/latest/ The files in this directory are identical, except that they have been renamed with a suffix indicating the unicode version. Individual source links: http://www.unicode.org/Public/11.0.0/ucd/CaseFolding.txt http://www.unicode.org/Public/11.0.0/ucd/DerivedAge.txt http://www.unicode.org/Public/11.0.0/ucd/extracted/DerivedCombiningClass.txt http://www.unicode.org/Public/11.0.0/ucd/DerivedCoreProperties.txt http://www.unicode.org/Public/11.0.0/ucd/NormalizationCorrections.txt http://www.unicode.org/Public/11.0.0/ucd/NormalizationTest.txt http://www.unicode.org/Public/11.0.0/ucd/UnicodeData.txt md5sums 414436796cf097df55f798e1585448ee CaseFolding-11.0.0.txt 6032a595fbb782694456491d86eecfac DerivedAge-11.0.0.txt 3240997d671297ac754ab0d27577acf7 DerivedCombiningClass-11.0.0.txt d41d8cd98f00b204e9800998ecf8427e DerivedCombiningClass.txt 2a4fe257d9d8184518e036194d2248ec DerivedCoreProperties-11.0.0.txt 4e7d383fa0dd3cd9d49d64e5b7b7c9e0 NormalizationCorrections-11.0.0.txt c9500c5b8b88e584469f056023ecc3f2 NormalizationTest-11.0.0.txt acc291106c3758d2025f8d7bd5518bee UnicodeData-11.0.0.txt