decimal64 int8 int16 int32 int64 uint8 uint16 uint32 uint64 string boolean enumeration bits binary leafref identityref empty instance-identifier anyxml argument augment base belongs-to bit case choice config contact container default description enum error-app-tag error-message extension deviation deviate feature fraction-digits grouping identity import include input key leaf leaf-list length list mandatory max-elements min-elements module must namespace notification ordered-by organization output path pattern position prefix presence range reference refine require-instance revision revision-date rpc status submodule type typedef unique units uses value when yang-version yin-element add current delete deprecated max min not-supported obsolete replace system unbounded user true false