diff --git a/graphql_parser/lib/src/language/ast/document.dart b/graphql_parser/lib/src/language/ast/document.dart
index d705e0d6..278d4d9c 100644
--- a/graphql_parser/lib/src/language/ast/document.dart
+++ b/graphql_parser/lib/src/language/ast/document.dart
@@ -2,7 +2,9 @@ import 'package:source_span/source_span.dart';
 import 'definition.dart';
 import 'node.dart';
 
+/// A GraphQL document.
 class DocumentContext extends Node {
+  /// The top-level definitions in the document.
   final List<DefinitionContext> definitions = [];
 
   @override