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Dart language specification
Language specification
The formal specification for the Dart language.

Use this page to find the formal Dart language specification. For a gentler introduction to Dart, see the language tour.

Dart 2

A formal Dart 2 specification is available in PDF format:

Note: Dart 2 has changed the Dart language in many ways, some of which are not backward-compatible. For details, see the Dart 2 page.

In-progress specification

The in-progress formal Dart language specification is written as a LaTeX file, and is available as a draft specification in PDF format.

New language features are typically described using informal language feature specifications in the dart-lang/language repo:

Dart 1.x

The formal Dart 1.x language specification is available from the Ecma International website:

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