The Ceylon language module containing the core definitions referred to by the [language specification][spec], along with some basic functionality of use to most programs: - The [[root package|package ceylon.language]] defines general-purpose functionality including support for [[numbers|Numeric]] and [[character strings|String]], [[streams|Iterable]] and [[sequences|Sequential]], [[exceptions|Throwable]], and [[null values|Null]]. - The Ceylon _metamodel_ is defined in [[package ...