diff --git a/graphql_parser/lib/src/language/ast/fragment_definition.dart b/graphql_parser/lib/src/language/ast/fragment_definition.dart
index 23787e07..00204bf2 100644
--- a/graphql_parser/lib/src/language/ast/fragment_definition.dart
+++ b/graphql_parser/lib/src/language/ast/fragment_definition.dart
@@ -5,22 +5,43 @@ import 'package:source_span/source_span.dart';
 import 'selection_set.dart';
 import 'type_condition.dart';
 
+/// A GraphQL query fragment definition.
 class FragmentDefinitionContext extends ExecutableDefinitionContext {
-  final Token FRAGMENT, NAME, ON;
+  /// The source tokens.
+  final Token fragmentToken, nameToken, onToken;
+
+  /// The type to which this fragment applies.
   final TypeConditionContext typeCondition;
+
+  /// Any directives on the fragment.
   final List<DirectiveContext> directives = [];
+
+  /// The selections to apply when the [typeCondition] is met.
   final SelectionSetContext selectionSet;
 
-  String get name => NAME.text;
+  /// The [String] value of the [nameToken].
+  String get name => nameToken.text;
 
-  FragmentDefinitionContext(
-      this.FRAGMENT, this.NAME, this.ON, this.typeCondition, this.selectionSet);
+  FragmentDefinitionContext(this.fragmentToken, this.nameToken, this.onToken,
+      this.typeCondition, this.selectionSet);
+
+  /// Use [fragmentToken] instead.
+  @deprecated
+  Token get FRAGMENT => fragmentToken;
+
+  /// Use [nameToken] instead.
+  @deprecated
+  Token get NAME => nameToken;
+
+  /// Use [onToken] instead.
+  @deprecated
+  Token get ON => onToken;
 
   @override
   FileSpan get span {
-    var out = FRAGMENT.span
-        .expand(NAME.span)
-        .expand(ON.span)
+    var out = fragmentToken.span
+        .expand(nameToken.span)
+        .expand(onToken.span)
         .expand(typeCondition.span);
     out = directives.fold<FileSpan>(out, (o, d) => o.expand(d.span));
     return out.expand(selectionSet.span);