CLDRLocaleDataMetaInfo is an implementation of LocaleDataMetaInfo SPI, which provides the information about locales it supports. Currently it resides in java.base module but really it should be in jdk.localedata module, with a different package name from sun.util.cldr (otherwise it would cause a split package both in java.base (sun.util.cldr.CLDRLocaleProviderAdapter) and jdk.localedata. sun.util.resources.cldr.provider is a possible alternative.