diff --git a/packages/wyatt_form_bloc/README.md b/packages/wyatt_form_bloc/README.md
index 2ac8212b..74a53324 100644
--- a/packages/wyatt_form_bloc/README.md
+++ b/packages/wyatt_form_bloc/README.md
@@ -30,21 +30,22 @@ Form Bloc for Dart & Flutter.
 ## Features
 
 - Form
-    * FormInput: *atom of a form*
+    * FormInputValidator:
         - Store data
         - Validate this data
-    * FormEntry: *shell of this atom*
-        - Associate a key to an input
-        - Configure form attribute (exportation, name...)
-    * FormData: *collection of entries*
-        - Contain all entries
+    * FormInputMetadata:
+        - Store infos and options about an input.
+    * FormInput:
+        - Associaite a key, to a validator and metadata.
+    * FormData: *collection of inputs*
+        - Contain all inputs
         - Basic set operation
 
 - FormDataCubit
     * Data management behind a form.
         - Use entries to pass a FormData object
-        - You can use several pre configured FormInput for validation
-        - You can use updateFormData() to change FormData and validators during runtime (intersection, union, difference or replace)
+        - You can use several pre configured `FormInputValidator` for validation
+        - You can use updateFormData() to change `FormData` during runtime (intersection, union, difference or replace)
 
 - Consistent
     * Every class have same naming convention
@@ -59,4 +60,120 @@ import 'package:wyatt_form_bloc/wyatt_form_bloc.dart';
 
 ## Usage
 
-todo
\ No newline at end of file
+Firstly, you have to create your form inputs.
+
+```dart
+static List<FormInput> getNormalEntries() {
+    return const [
+        FormInput(formFieldName, Name.pure()),
+        FormInput(formFieldEmail, Email.pure()),
+        FormInput(formFieldPhone, Phone.pure()),
+        FormInput(formFieldList, ListOption<String>.pure(defaultValue: ['checkbox3'])),
+        FormInput(formFieldRadio, TextString.pure()),
+        FormInput(formFieldPro, Boolean.pure(), metadata: FormInputMetadata<void>(name: 'business')),
+        FormInput(formFieldHidden, Boolean.pure(), metadata: FormInputMetadata<void>(export: false)),
+    ];
+}
+
+static List<FormInput> getBusinessEntries() {
+    const entries = [
+        FormInput(formFieldSiren, Siren.pure()),
+        FormInput(formFieldIban, Iban.pure()),
+    ];
+    return getNormalEntries() + entries;
+}
+
+static FormData getNormalFormData() {
+    return FormData(getNormalEntries());
+}
+
+static FormData getProFormData() {
+    return FormData(getBusinessEntries());
+}
+```
+
+> Let's create functions to enable dynamic changes in runtime.
+
+> When creating metadata with `FormInputMetadata<T>`, `T` is the type of `extra` object.
+
+Then a `FormData` is a collection of inputs. You can `validate`, `contains`, `intersection`, `difference`, `union`, or `clone` this data.
+
+After that, you have to extends `FormDataCubit`.
+
+```dart
+class CustomFormCubit extends FormDataCubit {
+  CustomFormCubit({required FormData inputs}) : super(inputs: inputs);
+
+  @override
+  Future<void> submitForm() {
+    log(state.data.toMap().toString());
+    // Handle all your logic here.
+    emit(...)
+  }
+}
+```
+
+> The submited form is in `state.data` !
+
+Don't forget to create and provide it !
+
+```dart
+FormDataCubit _formCubit = CustomFormCubit(inputs: getNormalFormData());
+
+return BlocProvider(
+    create: (context) => _formCubit,
+    child: const WidgetTree(),
+);
+```
+
+You can now create the first form input !
+
+```dart
+class _EmailInput extends StatelessWidget {
+  @override
+  Widget build(BuildContext context) {
+    return BlocBuilder<FormDataCubit, FormDataState>(
+      builder: (context, state) {
+        return TextField(
+          onChanged: (email) => context
+              .read<FormDataCubit>()
+              .dataChanged(formFieldEmail, Email.dirty(email)),
+          keyboardType: TextInputType.emailAddress,
+          decoration: InputDecoration(
+            labelText: 'email',
+            helperText: '',
+            errorText: state.data.isNotValid(formFieldEmail)
+                ? 'invalid email'
+                : null,
+          ),
+        );
+      },
+    );
+  }
+}
+```
+
+Then, you can create the trigger
+
+```dart
+class _SignUpButton extends StatelessWidget {
+  @override
+  Widget build(BuildContext context) {
+    return BlocBuilder<FormDataCubit, FormDataState>(
+      buildWhen: (previous, current) => previous.status != current.status,
+      builder: (context, state) {
+        return state.status.isSubmissionInProgress
+            ? const CircularProgressIndicator()
+            : ElevatedButton(
+                onPressed: state.status.isValidated
+                    ? () => context.read<FormDataCubit>().submitForm()
+                    : null,
+                child: const Text('SIGN UP'),
+              );
+      },
+    );
+  }
+}
+```
+
+> With `state.status` you can access the status of the form to check if there is an error or if it's in submission.
\ No newline at end of file
diff --git a/packages/wyatt_form_bloc/example/.metadata b/packages/wyatt_form_bloc/example/.metadata
index 3c3e4b52..75a8145c 100644
--- a/packages/wyatt_form_bloc/example/.metadata
+++ b/packages/wyatt_form_bloc/example/.metadata
@@ -1,10 +1,30 @@
 # This file tracks properties of this Flutter project.
 # Used by Flutter tool to assess capabilities and perform upgrades etc.
 #
-# This file should be version controlled and should not be manually edited.
+# This file should be version controlled.
 
 version:
-  revision: 5464c5bac742001448fe4fc0597be939379f88ea
+  revision: 85684f9300908116a78138ea4c6036c35c9a1236
   channel: stable
 
 project_type: app
+
+# Tracks metadata for the flutter migrate command
+migration:
+  platforms:
+    - platform: root
+      create_revision: 85684f9300908116a78138ea4c6036c35c9a1236
+      base_revision: 85684f9300908116a78138ea4c6036c35c9a1236
+    - platform: web
+      create_revision: 85684f9300908116a78138ea4c6036c35c9a1236
+      base_revision: 85684f9300908116a78138ea4c6036c35c9a1236
+
+  # User provided section
+
+  # List of Local paths (relative to this file) that should be
+  # ignored by the migrate tool.
+  #
+  # Files that are not part of the templates will be ignored by default.
+  unmanaged_files:
+    - 'lib/main.dart'
+    - 'ios/Runner.xcodeproj/project.pbxproj'
diff --git a/packages/wyatt_form_bloc/example/lib/app/app.dart b/packages/wyatt_form_bloc/example/lib/app/app.dart
index 60d99e66..cc8691b4 100644
--- a/packages/wyatt_form_bloc/example/lib/app/app.dart
+++ b/packages/wyatt_form_bloc/example/lib/app/app.dart
@@ -16,31 +16,37 @@
 
 import 'package:flutter/material.dart';
 import 'package:flutter_bloc/flutter_bloc.dart';
+import 'package:form_bloc_example/app/metadata.dart';
 import 'package:form_bloc_example/constants.dart';
 import 'package:form_bloc_example/cubit/custom_form_cubit.dart';
 import 'package:form_bloc_example/sign_up/sign_up_page.dart';
 import 'package:wyatt_form_bloc/wyatt_form_bloc.dart';
 
+const blue = Metadata(category: Category.perso);
+const red = Metadata(category: Category.business);
+
 class App extends StatelessWidget {
   const App({Key? key}) : super(key: key);
 
-  static List<FormEntry> getNormalEntries() {
+  static List<FormInput> getNormalEntries() {
     return const [
-      FormEntry(formFieldName, Name.pure()),
-      FormEntry(formFieldEmail, Email.pure()),
-      FormEntry(formFieldPhone, Phone.pure()),
-      FormEntry(
+      FormInput(formFieldName, Name.pure(), metadata: FormInputMetadata<Metadata>(extra: blue)),
+      FormInput(formFieldEmail, Email.pure(), metadata: FormInputMetadata<Metadata>(extra: blue)),
+      FormInput(formFieldPhone, Phone.pure(), metadata: FormInputMetadata<Metadata>(extra: red)),
+      FormInput(
           formFieldList, ListOption<String>.pure(defaultValue: ['checkbox3'])),
-      FormEntry(formFieldRadio, TextString.pure()),
-      FormEntry(formFieldPro, Boolean.pure(), name: 'business'),
-      FormEntry(formFieldHidden, Boolean.pure(), export: false),
+      FormInput(formFieldRadio, TextString.pure()),
+      FormInput(formFieldPro, Boolean.pure(),
+          metadata: FormInputMetadata<Metadata>(name: 'business')),
+      FormInput(formFieldHidden, Boolean.pure(),
+          metadata: FormInputMetadata<Metadata>(export: false, extra: blue)),
     ];
   }
 
-  static List<FormEntry> getBusinessEntries() {
+  static List<FormInput> getBusinessEntries() {
     const entries = [
-      FormEntry(formFieldSiren, Siren.pure()),
-      FormEntry(formFieldIban, Iban.pure()),
+      FormInput(formFieldSiren, Siren.pure()),
+      FormInput(formFieldIban, Iban.pure()),
     ];
     return getNormalEntries() + entries;
   }
@@ -55,7 +61,7 @@ class App extends StatelessWidget {
 
   @override
   Widget build(BuildContext context) {
-    FormDataCubit _formCubit = CustomFormCubit(entries: getNormalFormData());
+    FormDataCubit _formCubit = CustomFormCubit(inputs: getNormalFormData());
 
     return BlocProvider(
       create: (context) => _formCubit,
diff --git a/packages/wyatt_form_bloc/example/lib/cubit/custom_form_state.dart b/packages/wyatt_form_bloc/example/lib/app/metadata.dart
similarity index 72%
rename from packages/wyatt_form_bloc/example/lib/cubit/custom_form_state.dart
rename to packages/wyatt_form_bloc/example/lib/app/metadata.dart
index f6993044..b4e68725 100644
--- a/packages/wyatt_form_bloc/example/lib/cubit/custom_form_state.dart
+++ b/packages/wyatt_form_bloc/example/lib/app/metadata.dart
@@ -1,3 +1,4 @@
+// ignore_for_file: public_member_api_docs, sort_constructors_first
 // Copyright (C) 2022 WYATT GROUP
 // Please see the AUTHORS file for details.
 //
@@ -14,9 +15,20 @@
 // You should have received a copy of the GNU General Public License
 // along with this program. If not, see <https://www.gnu.org/licenses/>.
 
-part of 'custom_form_cubit.dart';
+enum Category {
+  perso,
+  business
+}
 
-@immutable
-abstract class CustomFormState {}
+class Metadata {
+  final Category category;
 
-class CustomFormInitial extends CustomFormState {}
+  const Metadata({
+    required this.category,
+  });
+
+  @override
+  String toString() {
+    return category.toString();
+  }
+}
diff --git a/packages/wyatt_form_bloc/example/lib/cubit/custom_form_cubit.dart b/packages/wyatt_form_bloc/example/lib/cubit/custom_form_cubit.dart
index 6cdae37d..3f211c60 100644
--- a/packages/wyatt_form_bloc/example/lib/cubit/custom_form_cubit.dart
+++ b/packages/wyatt_form_bloc/example/lib/cubit/custom_form_cubit.dart
@@ -16,18 +16,15 @@
 
 import 'dart:developer';
 
-import 'package:meta/meta.dart';
 import 'package:wyatt_form_bloc/wyatt_form_bloc.dart';
 
-part 'custom_form_state.dart';
-
 class CustomFormCubit extends FormDataCubit {
-  CustomFormCubit({required FormData entries}) : super(entries: entries);
+  CustomFormCubit({required FormData inputs}) : super(inputs: inputs);
 
   @override
   Future<void> submitForm() {
     log(state.data.toMap().toString());
-    
+
     return Future.value();
   }
 }
diff --git a/packages/wyatt_form_bloc/example/lib/sign_up/widgets/sign_up_form.dart b/packages/wyatt_form_bloc/example/lib/sign_up/widgets/sign_up_form.dart
index 82d28ed2..6d611a5d 100644
--- a/packages/wyatt_form_bloc/example/lib/sign_up/widgets/sign_up_form.dart
+++ b/packages/wyatt_form_bloc/example/lib/sign_up/widgets/sign_up_form.dart
@@ -19,35 +19,83 @@ import 'dart:developer';
 import 'package:flutter/material.dart';
 import 'package:flutter_bloc/flutter_bloc.dart';
 import 'package:form_bloc_example/app/app.dart';
+import 'package:form_bloc_example/app/metadata.dart';
 import 'package:form_bloc_example/constants.dart';
 import 'package:wyatt_form_bloc/wyatt_form_bloc.dart';
 
+class CategoryIndicator extends StatelessWidget {
+  const CategoryIndicator(
+      {Key? key, required this.field, required this.builder})
+      : super(key: key);
+
+  final String field;
+  final Function(BuildContext context, FormDataState state) builder;
+
+  Color computeColor(Metadata meta) {
+    switch (meta.category) {
+      case Category.perso:
+        return Colors.blue;
+      case Category.business:
+        return Colors.red;
+    }
+  }
+
+  @override
+  Widget build(BuildContext context) {
+    return BlocBuilder<FormDataCubit, FormDataState>(
+      builder: ((context, state) {
+        final meta = state.data.metadataOf(field).extra as Metadata;
+        final color = computeColor(meta);
+
+        return Row(
+          children: [
+            Container(
+              height: 8,
+              width: 8,
+              decoration: BoxDecoration(
+                color: color,
+                borderRadius: BorderRadius.circular(8),
+              ),
+            ),
+            const SizedBox(width: 20,),
+            SizedBox(
+              width: MediaQuery.of(context).size.width - 45,
+              child: builder(context, state),
+            )
+          ],
+        );
+      }),
+    );
+  }
+}
+
 class _NameInput extends StatelessWidget {
   @override
   Widget build(BuildContext context) {
-    return BlocBuilder<FormDataCubit, FormDataState>(
-      builder: (context, state) {
-        return TextField(
-          onChanged: (name) => context
-              .read<FormDataCubit>()
-              .dataChanged(formFieldName, Name.dirty(name)),
-          keyboardType: TextInputType.name,
-          decoration: InputDecoration(
-            labelText: 'name',
-            helperText: '',
-            errorText:
-                state.data.input(formFieldName).invalid ? 'invalid name' : null,
-          ),
-        );
-      },
-    );
+    return CategoryIndicator(
+        field: formFieldName,
+        builder: (context, state) {
+          return TextField(
+            onChanged: (name) => context
+                .read<FormDataCubit>()
+                .dataChanged(formFieldName, Name.dirty(name)),
+            keyboardType: TextInputType.name,
+            decoration: InputDecoration(
+              labelText: 'name',
+              helperText: '',
+              errorText:
+                  state.data.isNotValid(formFieldName) ? 'invalid name' : null,
+            ),
+          );
+        });
   }
 }
 
 class _EmailInput extends StatelessWidget {
   @override
   Widget build(BuildContext context) {
-    return BlocBuilder<FormDataCubit, FormDataState>(
+    return CategoryIndicator(
+        field: formFieldEmail,
       builder: (context, state) {
         return TextField(
           onChanged: (email) => context
@@ -57,9 +105,8 @@ class _EmailInput extends StatelessWidget {
           decoration: InputDecoration(
             labelText: 'email',
             helperText: '',
-            errorText: state.data.input(formFieldEmail).invalid
-                ? 'invalid email'
-                : null,
+            errorText:
+                state.data.isNotValid(formFieldEmail) ? 'invalid email' : null,
           ),
         );
       },
@@ -70,7 +117,8 @@ class _EmailInput extends StatelessWidget {
 class _PhoneInput extends StatelessWidget {
   @override
   Widget build(BuildContext context) {
-    return BlocBuilder<FormDataCubit, FormDataState>(
+    return CategoryIndicator(
+        field: formFieldPhone,
       builder: (context, state) {
         return TextField(
           onChanged: (phone) => context
@@ -80,9 +128,8 @@ class _PhoneInput extends StatelessWidget {
           decoration: InputDecoration(
             labelText: 'phone',
             helperText: '',
-            errorText: state.data.input(formFieldPhone).invalid
-                ? 'invalid phone'
-                : null,
+            errorText:
+                state.data.isNotValid(formFieldPhone) ? 'invalid phone' : null,
           ),
         );
       },
@@ -93,7 +140,8 @@ class _PhoneInput extends StatelessWidget {
 class _SirenInput extends StatelessWidget {
   @override
   Widget build(BuildContext context) {
-    return BlocBuilder<FormDataCubit, FormDataState>(
+    return CategoryIndicator(
+        field: formFieldName,
       builder: (context, state) {
         return TextField(
           onChanged: (siren) => context
@@ -103,9 +151,8 @@ class _SirenInput extends StatelessWidget {
           decoration: InputDecoration(
             labelText: 'siren',
             helperText: '',
-            errorText: state.data.input(formFieldSiren).invalid
-                ? 'invalid SIREN'
-                : null,
+            errorText:
+                state.data.isNotValid(formFieldSiren) ? 'invalid SIREN' : null,
           ),
         );
       },
@@ -127,7 +174,7 @@ class _IbanInput extends StatelessWidget {
             labelText: 'iban',
             helperText: '',
             errorText:
-                state.data.input(formFieldIban).invalid ? 'invalid IBAN' : null,
+                state.data.isNotValid(formFieldIban) ? 'invalid IBAN' : null,
           ),
         );
       },
@@ -141,7 +188,7 @@ class _CheckListInput extends StatelessWidget {
     return BlocBuilder<FormDataCubit, FormDataState>(
       builder: (context, state) {
         final _input =
-            state.data.input<List<String>>(formFieldList) as ListOption<String>;
+            state.data.validatorOf<ListOption<String>>(formFieldList);
         final _options = _input.value;
 
         return Column(
@@ -192,8 +239,7 @@ class _RadioListInput extends StatelessWidget {
   Widget build(BuildContext context) {
     return BlocBuilder<FormDataCubit, FormDataState>(
       builder: (context, state) {
-        final _input =
-            state.data.input<String>(formFieldRadio) as TextString;
+        final _input = state.data.validatorOf<TextString>(formFieldRadio);
 
         return Column(
           mainAxisSize: MainAxisSize.min,
@@ -249,7 +295,7 @@ class _CheckHiddenInput extends StatelessWidget {
       trailing: BlocBuilder<FormDataCubit, FormDataState>(
         builder: (context, state) {
           return Checkbox(
-              value: state.data.input<bool>(formFieldHidden).value,
+              value: state.data.validatorOf<Boolean>(formFieldHidden).value,
               onChanged: (v) {
                 final value = v!; // state is false, so value can't be null
 
@@ -272,7 +318,7 @@ class _CheckIsProInput extends StatelessWidget {
       trailing: BlocBuilder<FormDataCubit, FormDataState>(
         builder: (context, state) {
           return Checkbox(
-              value: state.data.input<bool>(formFieldPro).value,
+              value: state.data.validatorOf<Boolean>(formFieldPro).value,
               onChanged: (isPro) {
                 final value = isPro!; // state is false, so value can't be null
 
@@ -370,7 +416,7 @@ class SignUpForm extends StatelessWidget {
             const SizedBox(height: 8),
             BlocBuilder<FormDataCubit, FormDataState>(
               builder: (context, state) {
-                if (state.data.input<bool>(formFieldPro).value) {
+                if (state.data.validatorOf<Boolean>(formFieldPro).value) {
                   return Column(children: [
                     _SirenInput(),
                     const SizedBox(height: 8),
diff --git a/packages/wyatt_form_bloc/example/pubspec.yaml b/packages/wyatt_form_bloc/example/pubspec.yaml
index 64a109bb..63abb8c0 100644
--- a/packages/wyatt_form_bloc/example/pubspec.yaml
+++ b/packages/wyatt_form_bloc/example/pubspec.yaml
@@ -18,7 +18,7 @@ publish_to: 'none' # Remove this line if you wish to publish to pub.dev
 version: 1.0.0+1
 
 environment:
-  sdk: ">=2.16.2 <3.0.0"
+  sdk: ">=2.17.2 <3.0.0"
 
 # Dependencies specify other packages that your package needs in order to work.
 # To automatically upgrade your package dependencies to the latest versions
diff --git a/packages/wyatt_form_bloc/example/web/favicon.png b/packages/wyatt_form_bloc/example/web/favicon.png
new file mode 100644
index 00000000..8aaa46ac
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diff --git a/packages/wyatt_form_bloc/example/web/icons/Icon-192.png b/packages/wyatt_form_bloc/example/web/icons/Icon-192.png
new file mode 100644
index 00000000..b749bfef
Binary files /dev/null and b/packages/wyatt_form_bloc/example/web/icons/Icon-192.png differ
diff --git a/packages/wyatt_form_bloc/example/web/icons/Icon-512.png b/packages/wyatt_form_bloc/example/web/icons/Icon-512.png
new file mode 100644
index 00000000..88cfd48d
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diff --git a/packages/wyatt_form_bloc/example/web/icons/Icon-maskable-192.png b/packages/wyatt_form_bloc/example/web/icons/Icon-maskable-192.png
new file mode 100644
index 00000000..eb9b4d76
Binary files /dev/null and b/packages/wyatt_form_bloc/example/web/icons/Icon-maskable-192.png differ
diff --git a/packages/wyatt_form_bloc/example/web/icons/Icon-maskable-512.png b/packages/wyatt_form_bloc/example/web/icons/Icon-maskable-512.png
new file mode 100644
index 00000000..d69c5669
Binary files /dev/null and b/packages/wyatt_form_bloc/example/web/icons/Icon-maskable-512.png differ
diff --git a/packages/wyatt_form_bloc/example/web/index.html b/packages/wyatt_form_bloc/example/web/index.html
new file mode 100644
index 00000000..41b3bc33
--- /dev/null
+++ b/packages/wyatt_form_bloc/example/web/index.html
@@ -0,0 +1,58 @@
+<!DOCTYPE html>
+<html>
+<head>
+  <!--
+    If you are serving your web app in a path other than the root, change the
+    href value below to reflect the base path you are serving from.
+
+    The path provided below has to start and end with a slash "/" in order for
+    it to work correctly.
+
+    For more details:
+    * https://developer.mozilla.org/en-US/docs/Web/HTML/Element/base
+
+    This is a placeholder for base href that will be replaced by the value of
+    the `--base-href` argument provided to `flutter build`.
+  -->
+  <base href="$FLUTTER_BASE_HREF">
+
+  <meta charset="UTF-8">
+  <meta content="IE=Edge" http-equiv="X-UA-Compatible">
+  <meta name="description" content="A new Flutter project.">
+
+  <!-- iOS meta tags & icons -->
+  <meta name="apple-mobile-web-app-capable" content="yes">
+  <meta name="apple-mobile-web-app-status-bar-style" content="black">
+  <meta name="apple-mobile-web-app-title" content="example">
+  <link rel="apple-touch-icon" href="icons/Icon-192.png">
+
+  <!-- Favicon -->
+  <link rel="icon" type="image/png" href="favicon.png"/>
+
+  <title>example</title>
+  <link rel="manifest" href="manifest.json">
+
+  <script>
+    // The value below is injected by flutter build, do not touch.
+    var serviceWorkerVersion = null;
+  </script>
+  <!-- This script adds the flutter initialization JS code -->
+  <script src="flutter.js" defer></script>
+</head>
+<body>
+  <script>
+    window.addEventListener('load', function(ev) {
+      // Download main.dart.js
+      _flutter.loader.loadEntrypoint({
+        serviceWorker: {
+          serviceWorkerVersion: serviceWorkerVersion,
+        }
+      }).then(function(engineInitializer) {
+        return engineInitializer.initializeEngine();
+      }).then(function(appRunner) {
+        return appRunner.runApp();
+      });
+    });
+  </script>
+</body>
+</html>
diff --git a/packages/wyatt_form_bloc/example/web/manifest.json b/packages/wyatt_form_bloc/example/web/manifest.json
new file mode 100644
index 00000000..096edf8f
--- /dev/null
+++ b/packages/wyatt_form_bloc/example/web/manifest.json
@@ -0,0 +1,35 @@
+{
+    "name": "example",
+    "short_name": "example",
+    "start_url": ".",
+    "display": "standalone",
+    "background_color": "#0175C2",
+    "theme_color": "#0175C2",
+    "description": "A new Flutter project.",
+    "orientation": "portrait-primary",
+    "prefer_related_applications": false,
+    "icons": [
+        {
+            "src": "icons/Icon-192.png",
+            "sizes": "192x192",
+            "type": "image/png"
+        },
+        {
+            "src": "icons/Icon-512.png",
+            "sizes": "512x512",
+            "type": "image/png"
+        },
+        {
+            "src": "icons/Icon-maskable-192.png",
+            "sizes": "192x192",
+            "type": "image/png",
+            "purpose": "maskable"
+        },
+        {
+            "src": "icons/Icon-maskable-512.png",
+            "sizes": "512x512",
+            "type": "image/png",
+            "purpose": "maskable"
+        }
+    ]
+}
diff --git a/packages/wyatt_form_bloc/lib/src/cubit/form_data_cubit.dart b/packages/wyatt_form_bloc/lib/src/cubit/form_data_cubit.dart
index 728c239d..1be75738 100644
--- a/packages/wyatt_form_bloc/lib/src/cubit/form_data_cubit.dart
+++ b/packages/wyatt_form_bloc/lib/src/cubit/form_data_cubit.dart
@@ -17,6 +17,7 @@
 import 'dart:async';
 
 import 'package:bloc/bloc.dart';
+import 'package:equatable/equatable.dart';
 import 'package:meta/meta.dart';
 import 'package:wyatt_form_bloc/src/enums/enums.dart';
 import 'package:wyatt_form_bloc/src/form/form.dart';
@@ -24,19 +25,19 @@ import 'package:wyatt_form_bloc/src/form/form.dart';
 part 'form_data_state.dart';
 
 abstract class FormDataCubit extends Cubit<FormDataState> {
-  FormDataCubit({required FormData entries})
-      : super(FormDataState(data: entries));
+  FormDataCubit({required FormData inputs})
+      : super(FormDataState(data: inputs));
 
   /// Change value of a field.
   /// 
   /// Inputs:
   /// - `field`: The key of the field to change.
-  /// - `dirtyValue`: The new value of the field.
-  void dataChanged(String field, FormInput dirtyValue) {
+  /// - `dirtyValue`: The new value of the field. (Wrapped in a dirty validator)
+  void dataChanged(String field, FormInputValidator dirtyValue) {
     final _form = state.data.clone();
 
     if (_form.contains(field)) {
-      _form.update(field, dirtyValue);
+      _form.updateValidator(field, dirtyValue);
     } else {
       throw Exception('Form field $field not found');
     }
@@ -44,7 +45,7 @@ abstract class FormDataCubit extends Cubit<FormDataState> {
     emit(
       state.copyWith(
         data: _form,
-        status: _form.selfValidate(),
+        status: _form.validate(),
       ),
     );
   }
@@ -78,7 +79,7 @@ abstract class FormDataCubit extends Cubit<FormDataState> {
     emit(
       state.copyWith(
         data: _form,
-        status: _form.selfValidate(),
+        status: _form.validate(),
       ),
     );
   }
diff --git a/packages/wyatt_form_bloc/lib/src/cubit/form_data_state.dart b/packages/wyatt_form_bloc/lib/src/cubit/form_data_state.dart
index d8f5ec82..2d03e217 100644
--- a/packages/wyatt_form_bloc/lib/src/cubit/form_data_state.dart
+++ b/packages/wyatt_form_bloc/lib/src/cubit/form_data_state.dart
@@ -17,7 +17,7 @@
 part of 'form_data_cubit.dart';
 
 @immutable
-class FormDataState {
+class FormDataState extends Equatable {
   final FormStatus status;
   final FormData data;
   final String? errorMessage;
@@ -41,23 +41,8 @@ class FormDataState {
   }
 
   @override
-  bool operator ==(Object other) {
-    if (identical(this, other)) return true;
-
-    return other is FormDataState &&
-        other.status == status &&
-        other.data == data &&
-        other.errorMessage == errorMessage;
-  }
-
+  bool? get stringify => true;
+  
   @override
-  int get hashCode {
-    return status.hashCode ^ data.hashCode ^ errorMessage.hashCode;
-  }
-
-  @override
-  String toString() {
-    return 'FormDataState(status: $status, data: $data, '
-        'errorMessage: $errorMessage)';
-  }
+  List<Object?> get props => [status, data, errorMessage];
 }
diff --git a/packages/wyatt_form_bloc/lib/src/enums/form_status.dart b/packages/wyatt_form_bloc/lib/src/enums/form_status.dart
index 8e0709be..b5701ef6 100644
--- a/packages/wyatt_form_bloc/lib/src/enums/form_status.dart
+++ b/packages/wyatt_form_bloc/lib/src/enums/form_status.dart
@@ -14,6 +14,16 @@
 // You should have received a copy of the GNU General Public License
 // along with this program. If not, see <https://www.gnu.org/licenses/>.
 
+import 'package:wyatt_form_bloc/src/form/form.dart';
+
+const Set<FormStatus> _validatedFormStatuses = <FormStatus>{
+  FormStatus.valid,
+  FormStatus.submissionInProgress,
+  FormStatus.submissionSuccess,
+  FormStatus.submissionFailure,
+  FormStatus.submissionCanceled,
+};
+
 /// Enum representing the status of a form at any given point in time.
 enum FormStatus {
   /// The form has not been touched.
@@ -35,19 +45,8 @@ enum FormStatus {
   submissionFailure,
 
   /// The form submission has been canceled.
-  submissionCanceled
-}
+  submissionCanceled;
 
-const Set<FormStatus> _validatedFormStatuses = <FormStatus>{
-  FormStatus.valid,
-  FormStatus.submissionInProgress,
-  FormStatus.submissionSuccess,
-  FormStatus.submissionFailure,
-  FormStatus.submissionCanceled,
-};
-
-/// Useful extensions on [FormStatus]
-extension FormStatusX on FormStatus {
   /// Indicates whether the form is untouched.
   bool get isPure => this == FormStatus.pure;
 
@@ -76,4 +75,13 @@ extension FormStatusX on FormStatus {
 
   /// Indicates whether the form submission has been canceled.
   bool get isSubmissionCanceled => this == FormStatus.submissionCanceled;
+
+  /// Validate a list of inputs
+  static FormStatus validate(List<FormInput> inputs) {
+    return inputs.every((FormInput input) => input.validator.pure)
+        ? FormStatus.pure
+        : inputs.any((FormInput input) => input.validator.valid == false)
+            ? FormStatus.invalid
+            : FormStatus.valid;
+  }
 }
diff --git a/packages/wyatt_form_bloc/lib/src/form/form.dart b/packages/wyatt_form_bloc/lib/src/form/form.dart
index a7ab3277..2a131d1b 100644
--- a/packages/wyatt_form_bloc/lib/src/form/form.dart
+++ b/packages/wyatt_form_bloc/lib/src/form/form.dart
@@ -1,19 +1,25 @@
 // Copyright (C) 2022 WYATT GROUP
 // Please see the AUTHORS file for details.
-// 
+//
 // This program is free software: you can redistribute it and/or modify
 // it under the terms of the GNU General Public License as published by
 // the Free Software Foundation, either version 3 of the License, or
 // any later version.
-// 
+//
 // This program is distributed in the hope that it will be useful,
 // but WITHOUT ANY WARRANTY; without even the implied warranty of
 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 // GNU General Public License for more details.
-// 
+//
 // You should have received a copy of the GNU General Public License
 // along with this program. If not, see <https://www.gnu.org/licenses/>.
 
-export 'form_data.dart';
-export 'form_entry.dart';
-export 'form_input.dart';
+import 'package:equatable/equatable.dart';
+import 'package:meta/meta.dart';
+import 'package:wyatt_form_bloc/src/enums/form_input_status.dart';
+import 'package:wyatt_form_bloc/src/enums/form_status.dart';
+
+part 'form_input.dart';
+part 'form_input_metadata.dart';
+part 'form_input_validator.dart';
+part 'form_data.dart';
diff --git a/packages/wyatt_form_bloc/lib/src/form/form_data.dart b/packages/wyatt_form_bloc/lib/src/form/form_data.dart
index 6bad8487..8c978cf9 100644
--- a/packages/wyatt_form_bloc/lib/src/form/form_data.dart
+++ b/packages/wyatt_form_bloc/lib/src/form/form_data.dart
@@ -14,133 +14,164 @@
 // You should have received a copy of the GNU General Public License
 // along with this program. If not, see <https://www.gnu.org/licenses/>.
 
-import 'package:meta/meta.dart';
-import 'package:wyatt_form_bloc/src/enums/enums.dart';
-import 'package:wyatt_form_bloc/src/form/form.dart';
-import 'package:wyatt_form_bloc/src/utils/list_equals.dart';
+part of 'form.dart';
 
 @immutable
-class FormData {
-  const FormData(this._entries);
+class FormData extends Equatable {
+  final List<FormInput> _inputs;
 
-  FormData.empty() : this(<FormEntry>[]);
+  const FormData(this._inputs);
+  const FormData.empty() : this(const <FormInput>[]);
 
-  final List<FormEntry> _entries;
-
-  List<FormEntry> get entries => _entries;
-
-  List<FormInput<T, ValidationError>> inputs<T>() {
-    return _entries
-        .map((FormEntry entry) => entry.input as FormInput<T, ValidationError>)
-        .toList();
-  }
-
-  static FormStatus validate(List<FormInput> inputs) {
-    return inputs.every((FormInput element) => element.pure)
-        ? FormStatus.pure
-        : inputs.any((FormInput input) => input.valid == false)
-            ? FormStatus.invalid
-            : FormStatus.valid;
-  }
-
-  FormStatus selfValidate() {
-    return validate(inputs<dynamic>());
-  }
-
-  FormInput<T, ValidationError> input<T>(String key) {
+  /// Returns the input for the associated key
+  FormInput inputByKey(String key) {
     if (contains(key)) {
-      return _entries.firstWhere((FormEntry entry) => entry.key == key).input
-          as FormInput<T, ValidationError>;
+      return _inputs.firstWhere((FormInput input) => input.key == key);
     } else {
       throw Exception('FormInput with key `$key` does not exist in form');
     }
   }
 
-  bool contains(String key) {
-    return _entries.any((FormEntry entry) => entry.key == key);
-  }
-
-  FormData intersection(FormData other) {
-    final List<FormEntry> entries = <FormEntry>[];
-
-    for (final FormEntry entry in _entries) {
-      if (other.contains(entry.key)) {
-        entries.add(entry);
-      }
-    }
-
-    return FormData(entries);
-  }
-
-  FormData difference(FormData other) {
-    final List<FormEntry> entries = <FormEntry>[];
-
-    for (final FormEntry otherEntry in other._entries) {
-      if (!contains(otherEntry.key)) {
-        entries.add(otherEntry);
-      }
-    }
-
-    for (final FormEntry entry in _entries) {
-      if (!other.contains(entry.key)) {
-        entries.add(entry);
-      }
-    }
-
-    return FormData(entries);
-  }
-
-  FormData union(FormData other) {
-    final List<FormEntry> entries = <FormEntry>[];
-
-    for (final FormEntry entry in _entries) {
-      entries.add(entry);
-    }
-
-    for (final FormEntry otherEntry in other._entries) {
-      if (!contains(otherEntry.key)) {
-        entries.add(otherEntry);
-      }
-    }
-
-    return FormData(entries);
-  }
-
-  void update(String key, FormInput input) {
+  /// Updates a input (perform a replace at index).
+  void updateInput(String key, FormInput input) {
     if (contains(key)) {
-      final index = _entries.indexOf(
-        _entries.firstWhere((FormEntry entry) => entry.key == key),
+      final index = _inputs.indexOf(
+        inputByKey(key),
       );
-      _entries[index] = _entries[index].copyWith(input: input);
+      _inputs[index] = input;
     }
   }
 
+  /// Updates validator of a given input. (perform copyWith)
+  void updateValidator(String key, FormInputValidator dirtyValue) {
+    if (contains(key)) {
+      final index = _inputs.indexOf(
+        inputByKey(key),
+      );
+      _inputs[index] = _inputs[index].copyWith(validator: dirtyValue);
+    }
+  }
+
+  /// Updates metadata of a given input. (perform copyWith)
+  void updateMetadata(String key, FormInputMetadata meta) {
+    if (contains(key)) {
+      final index = _inputs.indexOf(
+        inputByKey(key),
+      );
+      _inputs[index] = _inputs[index].copyWith(metadata: meta);
+    }
+  }
+
+  /// A [FormInputValidator] represents the value of a single form input field.
+  /// It contains information about the [FormInputStatus], value, as well
+  /// as validation status.
+  T validatorOf<T>(String key) {
+    return inputByKey(key).validator as T;
+  }
+
+  /// Returns a validation error if the [FormInputValidator] is invalid. 
+  /// Returns null if the [FormInputValidator] is valid.
+  E? errorOf<V, E>(String key) {
+    return (inputByKey(key).validator as FormInputValidator<V, E>).error;
+  }
+
+  /// The value of the associated [FormInputValidator]. For example, 
+  /// if you have a FormInputValidator for FirstName, the value could be 'Joe'.
+  V valueOf<V, E>(String key) {
+    return (inputByKey(key).validator as FormInputValidator<V, E>).value;
+  }
+
+  /// Returns `true` if the [FormInputValidator] is not valid.
+  /// Same as `E? errorOf<V, E>(String key) != null`
+  bool isNotValid(String key) {
+    return !inputByKey(key).validator.valid;
+  }
+
+  /// Returns the metadata associated. With `M` the type of extra data.
+  FormInputMetadata<M> metadataOf<M>(String key) {
+    return inputByKey(key).metadata as FormInputMetadata<M>;
+  }
+
+  /// Validate self inputs.
+  FormStatus validate() {
+    return FormStatus.validate(_inputs);
+  }
+
+  /// Check if this contains an input with the given key.
+  bool contains(String key) {
+    return _inputs.any((FormInput input) => input.key == key);
+  }
+
+  /// Makes an intersection set operation and returns newly created [FormData]
+  FormData intersection(FormData other) {
+    final List<FormInput> inputs = <FormInput>[];
+
+    for (final FormInput i in _inputs) {
+      if (other.contains(i.key)) {
+        inputs.add(i);
+      }
+    }
+
+    return FormData(inputs);
+  }
+
+  /// Makes a difference set operation and returns newly created [FormData]
+  FormData difference(FormData other) {
+    final List<FormInput> inputs = <FormInput>[];
+
+    for (final FormInput i in other._inputs) {
+      if (!contains(i.key)) {
+        inputs.add(i);
+      }
+    }
+
+    for (final FormInput i in _inputs) {
+      if (!other.contains(i.key)) {
+        inputs.add(i);
+      }
+    }
+
+    return FormData(inputs);
+  }
+
+  /// Makes an union set operation and returns newly created [FormData]
+  FormData union(FormData other) {
+    final List<FormInput> inputs = <FormInput>[];
+
+    for (final FormInput i in _inputs) {
+      inputs.add(i);
+    }
+
+    for (final FormInput i in other._inputs) {
+      if (!contains(i.key)) {
+        inputs.add(i);
+      }
+    }
+
+    return FormData(inputs);
+  }
+
+  /// Deeply copy this.
   FormData clone() {
     return FormData(
-      _entries.map((FormEntry entry) => entry.clone()).toList(),
+      _inputs.map((FormInput input) => input.clone()).toList(),
     );
   }
 
+  /// Export this to [Map] format.
   Map<String, dynamic> toMap() {
     final map = <String, dynamic>{};
-    for (final entry in _entries) {
-      if (entry.export) {
-        map[entry.name] = entry.input.value;
+    for (final input in _inputs) {
+      if (input.metadata.export) {
+        map[input.name] = input.validator.value;
       }
     }
     return map;
   }
 
   @override
-  bool operator ==(Object other) {
-    if (identical(this, other)) return true;
-
-    return other is FormData && listEquals(other._entries, _entries);
-  }
-
+  bool? get stringify => true;
+  
   @override
-  int get hashCode => _entries.hashCode;
-
-  @override
-  String toString() => 'FormData(entries: $_entries)';
+  List<Object?> get props => _inputs;
 }
diff --git a/packages/wyatt_form_bloc/lib/src/form/form_entry.dart b/packages/wyatt_form_bloc/lib/src/form/form_entry.dart
deleted file mode 100644
index 017da7c6..00000000
--- a/packages/wyatt_form_bloc/lib/src/form/form_entry.dart
+++ /dev/null
@@ -1,79 +0,0 @@
-// Copyright (C) 2022 WYATT GROUP
-// Please see the AUTHORS file for details.
-//
-// This program is free software: you can redistribute it and/or modify
-// it under the terms of the GNU General Public License as published by
-// the Free Software Foundation, either version 3 of the License, or
-// any later version.
-//
-// This program is distributed in the hope that it will be useful,
-// but WITHOUT ANY WARRANTY; without even the implied warranty of
-// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-// GNU General Public License for more details.
-//
-// You should have received a copy of the GNU General Public License
-// along with this program. If not, see <https://www.gnu.org/licenses/>.
-
-import 'package:meta/meta.dart';
-import 'package:wyatt_form_bloc/src/form/form.dart';
-
-@immutable
-class FormEntry {
-  const FormEntry(this.key, this.input, {this.export = true, String? name})
-      : _field = name ?? key;
-
-  final String key;
-  final FormInput input;
-  final bool export;
-  final String _field;
-
-  String get name => _field;
-
-  FormEntry copyWith({
-    String? key,
-    FormInput? input,
-    bool? export,
-    String? name,
-  }) {
-    return FormEntry(
-      key ?? this.key,
-      input ?? this.input,
-      export: export ?? this.export,
-      name: name,
-    );
-  }
-
-  FormEntry clone() {
-    return FormEntry(
-      key,
-      input,
-      export: export,
-      name: name,
-    );
-  }
-
-  @override
-  bool operator ==(Object other) {
-    if (identical(this, other)) return true;
-
-    return other is FormEntry &&
-        other.key == key &&
-        other.input == input &&
-        other.export == export &&
-        other.name == name;
-  }
-
-  @override
-  int get hashCode {
-    return key.hashCode ^
-        input.hashCode ^
-        export.hashCode ^
-        name.hashCode;
-  }
-
-  @override
-  String toString() {
-    return 'FormEntry(key: $key, input: $input, '
-        'export: $export, name: $name)';
-  }
-}
diff --git a/packages/wyatt_form_bloc/lib/src/form/form_input.dart b/packages/wyatt_form_bloc/lib/src/form/form_input.dart
index d438e4ab..58a2e506 100644
--- a/packages/wyatt_form_bloc/lib/src/form/form_input.dart
+++ b/packages/wyatt_form_bloc/lib/src/form/form_input.dart
@@ -1,3 +1,4 @@
+// ignore_for_file: public_member_api_docs, sort_constructors_first
 // Copyright (C) 2022 WYATT GROUP
 // Please see the AUTHORS file for details.
 //
@@ -14,98 +15,45 @@
 // You should have received a copy of the GNU General Public License
 // along with this program. If not, see <https://www.gnu.org/licenses/>.
 
-import 'package:meta/meta.dart';
-import 'package:wyatt_form_bloc/src/enums/enums.dart';
+part of 'form.dart';
 
-/// {@template form_input}
-/// A [FormInput] represents the value of a single form input field.
-/// It contains information about the [FormInputStatus], [value], as well
-/// as validation status.
-///
-/// [FormInput] should be extended to define custom [FormInput] instances.
-///
-/// ```dart
-/// enum FirstNameError { empty }
-/// class FirstName extends FormInput<String, FirstNameError> {
-///   const FirstName.pure({String value = ''}) : super.pure(value);
-///   const FirstName.dirty({String value = ''}) : super.dirty(value);
-///
-///   @override
-///   FirstNameError? validator(String value) {
-///     return value.isEmpty ? FirstNameError.empty : null;
-///   }
-/// }
-/// ```
-/// {@endtemplate}
-@immutable
-abstract class FormInput<T, E> {
-  const FormInput._(this.value, [this.pure = true]);
+class FormInput extends Equatable {
+  final String key;
+  final FormInputValidator validator;
+  final FormInputMetadata metadata;
 
-  /// Constructor which create a `pure` [FormInput] with a given value.
-  const FormInput.pure(T value) : this._(value);
+  String get name => metadata._name ?? key;
 
-  /// Constructor which create a `dirty` [FormInput] with a given value.
-  const FormInput.dirty(T value) : this._(value, false);
-
-  /// The value of the given [FormInput].
-  /// For example, if you have a `FormInput` for `FirstName`,
-  /// the value could be 'Joe'.
-  final T value;
-
-  /// If the [FormInput] is pure (has been touched/modified).
-  /// Typically when the `FormInput` is initially created,
-  /// it is created using the `FormInput.pure` constructor to
-  /// signify that the user has not modified it.
-  ///
-  /// For subsequent changes (in response to user input), the
-  /// `FormInput.dirty` constructor should be used to signify that
-  /// the `FormInput` has been manipulated.
-  final bool pure;
-
-  /// The [FormInputStatus] which can be one of the following:
-  /// * [FormInputStatus.pure]
-  ///   - if the input has not been modified.
-  /// * [FormInputStatus.invalid]
-  ///   - if the input has been modified and validation failed.
-  /// * [FormInputStatus.valid]
-  ///   - if the input has been modified and validation succeeded.
-  FormInputStatus get status => pure
-      ? FormInputStatus.pure
-      : valid
-          ? FormInputStatus.valid
-          : FormInputStatus.invalid;
-
-  /// Returns a validation error if the [FormInput] is invalid.
-  /// Returns `null` if the [FormInput] is valid.
-  E? get error => validator(value);
-
-  /// Whether the [FormInput] value is valid according to the
-  /// overridden `validator`.
-  ///
-  /// Returns `true` if `validator` returns `null` for the
-  /// current [FormInput] value and `false` otherwise.
-  bool get valid => validator(value) == null;
-
-  /// Whether the [FormInput] value is not valid.
-  /// A value is invalid when the overridden `validator`
-  /// returns an error (non-null value).
-  bool get invalid => status == FormInputStatus.invalid;
-
-  /// A function that must return a validation error if the provided
-  /// [value] is invalid and `null` otherwise.
-  E? validator(T value);
+  const FormInput(
+    this.key,
+    this.validator, {
+    // ignore: avoid_redundant_argument_values
+    this.metadata = const FormInputMetadata<void>(export: true),
+  });
 
   @override
-  int get hashCode => value.hashCode ^ pure.hashCode;
+  bool? get stringify => true;
 
   @override
-  bool operator ==(Object other) {
-    if (other.runtimeType != runtimeType) return false;
-    return other is FormInput<T, E> &&
-        other.value == value &&
-        other.pure == pure;
+  List<Object?> get props => [key, validator, metadata];
+
+  FormInput copyWith({
+    String? key,
+    FormInputValidator? validator,
+    FormInputMetadata? metadata,
+  }) {
+    return FormInput(
+      key ?? this.key,
+      validator ?? this.validator,
+      metadata: metadata ?? this.metadata,
+    );
   }
 
-  @override
-  String toString() => 'FormInput<$runtimeType>(value: $value, pure: $pure)';
+  FormInput clone() {
+    return copyWith(
+      key: key,
+      validator: validator,
+      metadata: metadata,
+    );
+  }
 }
diff --git a/packages/wyatt_form_bloc/lib/src/form/form_input_metadata.dart b/packages/wyatt_form_bloc/lib/src/form/form_input_metadata.dart
new file mode 100644
index 00000000..e8921ef1
--- /dev/null
+++ b/packages/wyatt_form_bloc/lib/src/form/form_input_metadata.dart
@@ -0,0 +1,56 @@
+// ignore_for_file: public_member_api_docs, sort_constructors_first
+// Copyright (C) 2022 WYATT GROUP
+// Please see the AUTHORS file for details.
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program. If not, see <https://www.gnu.org/licenses/>.
+
+part of 'form.dart';
+
+class FormInputMetadata<T> extends Equatable {
+  final bool export;
+  final String? _name;
+  final T? extra;
+
+  const FormInputMetadata({
+    this.export = true,
+    this.extra,
+    String? name,
+  }) : _name = name;
+  
+  @override
+  bool? get stringify => true;
+
+  @override
+  List<Object?> get props => [export, _name, extra];
+
+  FormInputMetadata<T> copyWith({
+    bool? export,
+    String? name,
+    T? extra,
+  }) {
+    return FormInputMetadata<T>(
+      export: export ?? this.export,
+      name: name ?? _name,
+      extra: extra ?? this.extra,
+    );
+  }
+
+  FormInputMetadata<T> clone() {
+    return copyWith(
+      export: export,
+      name: _name,
+      extra: extra,
+    );
+  }
+}
diff --git a/packages/wyatt_form_bloc/lib/src/form/form_input_validator.dart b/packages/wyatt_form_bloc/lib/src/form/form_input_validator.dart
new file mode 100644
index 00000000..3207762a
--- /dev/null
+++ b/packages/wyatt_form_bloc/lib/src/form/form_input_validator.dart
@@ -0,0 +1,104 @@
+// Copyright (C) 2022 WYATT GROUP
+// Please see the AUTHORS file for details.
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program. If not, see <https://www.gnu.org/licenses/>.
+
+part of 'form.dart';
+
+/// {@template form_input}
+/// A [FormInputValidator] represents the value of a single form input field.
+/// It contains information about the [FormInputStatus], [value], as well
+/// as validation status.
+///
+/// [FormInputValidator] should be extended to define custom
+/// [FormInputValidator] instances.
+///
+/// ```dart
+/// enum FirstNameError { empty }
+/// class FirstName extends FormInputValidator<String, FirstNameError> {
+///   const FirstName.pure({String value = ''}) : super.pure(value);
+///   const FirstName.dirty({String value = ''}) : super.dirty(value);
+///
+///   @override
+///   FirstNameError? validator(String value) {
+///     return value.isEmpty ? FirstNameError.empty : null;
+///   }
+/// }
+/// ```
+/// {@endtemplate}
+@immutable
+abstract class FormInputValidator<V, E> extends Equatable {
+  const FormInputValidator._(this.value, [this.pure = true]);
+
+  /// Constructor which create a `pure` [FormInputValidator] with a given value.
+  const FormInputValidator.pure(V value) : this._(value);
+
+  /// Constructor which create a `dirty` [FormInputValidator] with a 
+  /// given value.
+  const FormInputValidator.dirty(V value) : this._(value, false);
+
+  /// The value of the given [FormInputValidator].
+  /// For example, if you have a `FormInputValidator` for `FirstName`,
+  /// the value could be 'Joe'.
+  final V value;
+
+  /// If the [FormInputValidator] is pure (has been touched/modified).
+  /// Typically when the `FormInputValidator` is initially created,
+  /// it is created using the `FormInputValidator.pure` constructor to
+  /// signify that the user has not modified it.
+  ///
+  /// For subsequent changes (in response to user input), the
+  /// `FormInputValidator.dirty` constructor should be used to signify that
+  /// the `FormInputValidator` has been manipulated.
+  final bool pure;
+
+  /// The [FormInputStatus] which can be one of the following:
+  /// * [FormInputStatus.pure]
+  ///   - if the input has not been modified.
+  /// * [FormInputStatus.invalid]
+  ///   - if the input has been modified and validation failed.
+  /// * [FormInputStatus.valid]
+  ///   - if the input has been modified and validation succeeded.
+  FormInputStatus get status => pure
+      ? FormInputStatus.pure
+      : valid
+          ? FormInputStatus.valid
+          : FormInputStatus.invalid;
+
+  /// Returns a validation error if the [FormInputValidator] is invalid.
+  /// Returns `null` if the [FormInputValidator] is valid.
+  E? get error => validator(value);
+
+  /// Whether the [FormInputValidator] value is valid according to the
+  /// overridden `validator`.
+  ///
+  /// Returns `true` if `validator` returns `null` for the
+  /// current [FormInputValidator] value and `false` otherwise.
+  bool get valid => validator(value) == null;
+
+  /// Whether the [FormInputValidator] value is not valid.
+  /// A value is invalid when the overridden `validator`
+  /// returns an error (non-null value).
+  bool get invalid => status == FormInputStatus.invalid;
+
+  /// A function that must return a validation error if the provided
+  /// [value] is invalid and `null` otherwise.
+  E? validator(V value);
+
+  @override
+  bool? get stringify => true;
+
+  @override
+  List<Object?> get props => [value, pure];
+}
diff --git a/packages/wyatt_form_bloc/lib/src/utils/list_equals.dart b/packages/wyatt_form_bloc/lib/src/utils/list_equals.dart
deleted file mode 100644
index e7d1989c..00000000
--- a/packages/wyatt_form_bloc/lib/src/utils/list_equals.dart
+++ /dev/null
@@ -1,25 +0,0 @@
-// Copyright (C) 2022 WYATT GROUP
-// Please see the AUTHORS file for details.
-//
-// This program is free software: you can redistribute it and/or modify
-// it under the terms of the GNU General Public License as published by
-// the Free Software Foundation, either version 3 of the License, or
-// any later version.
-//
-// This program is distributed in the hope that it will be useful,
-// but WITHOUT ANY WARRANTY; without even the implied warranty of
-// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-// GNU General Public License for more details.
-//
-// You should have received a copy of the GNU General Public License
-// along with this program. If not, see <https://www.gnu.org/licenses/>.
-
-bool listEquals<T>(List<T>? a, List<T>? b) {
-  if (a == null) return b == null;
-  if (b == null || a.length != b.length) return false;
-  if (identical(a, b)) return true;
-  for (int index = 0; index < a.length; index += 1) {
-    if (a[index] != b[index]) return false;
-  }
-  return true;
-}
diff --git a/packages/wyatt_form_bloc/lib/src/validators/boolean.dart b/packages/wyatt_form_bloc/lib/src/validators/boolean.dart
index db03ffe6..30349320 100644
--- a/packages/wyatt_form_bloc/lib/src/validators/boolean.dart
+++ b/packages/wyatt_form_bloc/lib/src/validators/boolean.dart
@@ -20,7 +20,7 @@ import 'package:wyatt_form_bloc/src/form/form.dart';
 /// {@template boolean}
 /// Form input for a bool input
 /// {@endtemplate}
-class Boolean extends FormInput<bool, ValidationError> {
+class Boolean extends FormInputValidator<bool, ValidationError> {
   /// {@macro boolean}
   const Boolean.pure({bool? defaultValue = false})
       : super.pure(defaultValue ?? false);
diff --git a/packages/wyatt_form_bloc/lib/src/validators/confirmed_password.dart b/packages/wyatt_form_bloc/lib/src/validators/confirmed_password.dart
index 3637a5ee..158fef70 100644
--- a/packages/wyatt_form_bloc/lib/src/validators/confirmed_password.dart
+++ b/packages/wyatt_form_bloc/lib/src/validators/confirmed_password.dart
@@ -21,7 +21,7 @@ import 'package:wyatt_form_bloc/src/form/form.dart';
 /// Form input for a confirmed password input.
 /// {@endtemplate}
 class ConfirmedPassword
-    extends FormInput<String, ValidationError> {
+    extends FormInputValidator<String, ValidationError> {
   /// {@macro confirmed_password}
   const ConfirmedPassword.pure({this.password = ''}) : super.pure('');
 
diff --git a/packages/wyatt_form_bloc/lib/src/validators/email.dart b/packages/wyatt_form_bloc/lib/src/validators/email.dart
index 9de7c449..a8192ca6 100644
--- a/packages/wyatt_form_bloc/lib/src/validators/email.dart
+++ b/packages/wyatt_form_bloc/lib/src/validators/email.dart
@@ -20,7 +20,7 @@ import 'package:wyatt_form_bloc/src/form/form.dart';
 /// {@template email}
 /// Form input for an email input.
 /// {@endtemplate}
-class Email extends FormInput<String, ValidationError> {
+class Email extends FormInputValidator<String, ValidationError> {
   /// {@macro email}
   const Email.pure() : super.pure('');
 
@@ -28,7 +28,7 @@ class Email extends FormInput<String, ValidationError> {
   const Email.dirty([String value = '']) : super.dirty(value);
 
   static final RegExp _emailRegExp = RegExp(
-    r'^[a-zA-Z0-9.!#$%&’*+/=?^_`{|}~-]+@[a-zA-Z0-9-]+(?:\.[a-zA-Z0-9-]+)*$',
+    r'[^@ \t\r\n]+@[^@ \t\r\n]+\.[^@ \t\r\n]+',
   );
 
   @override
diff --git a/packages/wyatt_form_bloc/lib/src/validators/iban.dart b/packages/wyatt_form_bloc/lib/src/validators/iban.dart
index 301c1bcc..64b98665 100644
--- a/packages/wyatt_form_bloc/lib/src/validators/iban.dart
+++ b/packages/wyatt_form_bloc/lib/src/validators/iban.dart
@@ -20,7 +20,7 @@ import 'package:wyatt_form_bloc/src/form/form.dart';
 /// {@template iban}
 /// Form input for an IBAN input.
 /// {@endtemplate}
-class Iban extends FormInput<String, ValidationError> {
+class Iban extends FormInputValidator<String, ValidationError> {
   /// {@macro iban}
   const Iban.pure() : super.pure('');
 
diff --git a/packages/wyatt_form_bloc/lib/src/validators/list_option.dart b/packages/wyatt_form_bloc/lib/src/validators/list_option.dart
index 13c7dc5c..d021223a 100644
--- a/packages/wyatt_form_bloc/lib/src/validators/list_option.dart
+++ b/packages/wyatt_form_bloc/lib/src/validators/list_option.dart
@@ -20,7 +20,7 @@ import 'package:wyatt_form_bloc/src/form/form.dart';
 /// {@template list_option}
 /// Form input for a list input
 /// {@endtemplate}
-class ListOption<T> extends FormInput<List<T>, ValidationError> {
+class ListOption<T> extends FormInputValidator<List<T>, ValidationError> {
   /// {@macro list_option}
   const ListOption.pure({List<T>? defaultValue})
       : super.pure(defaultValue ?? const []);
diff --git a/packages/wyatt_form_bloc/lib/src/validators/name.dart b/packages/wyatt_form_bloc/lib/src/validators/name.dart
index 952c6353..860a3b48 100644
--- a/packages/wyatt_form_bloc/lib/src/validators/name.dart
+++ b/packages/wyatt_form_bloc/lib/src/validators/name.dart
@@ -20,7 +20,7 @@ import 'package:wyatt_form_bloc/src/form/form.dart';
 /// {@template name}
 /// Form input for a name input.
 /// {@endtemplate}
-class Name extends FormInput<String, ValidationError> {
+class Name extends FormInputValidator<String, ValidationError> {
   /// {@macro name}
   const Name.pure() : super.pure('');
 
diff --git a/packages/wyatt_form_bloc/lib/src/validators/password.dart b/packages/wyatt_form_bloc/lib/src/validators/password.dart
index f897c9f6..b9ee5fe1 100644
--- a/packages/wyatt_form_bloc/lib/src/validators/password.dart
+++ b/packages/wyatt_form_bloc/lib/src/validators/password.dart
@@ -20,7 +20,7 @@ import 'package:wyatt_form_bloc/src/form/form.dart';
 /// {@template password}
 /// Form input for a password input.
 /// {@endtemplate}
-class Password extends FormInput<String, ValidationError> {
+class Password extends FormInputValidator<String, ValidationError> {
   /// {@macro password}
   const Password.pure() : super.pure('');
 
diff --git a/packages/wyatt_form_bloc/lib/src/validators/phone.dart b/packages/wyatt_form_bloc/lib/src/validators/phone.dart
index ba009760..8a63cc2e 100644
--- a/packages/wyatt_form_bloc/lib/src/validators/phone.dart
+++ b/packages/wyatt_form_bloc/lib/src/validators/phone.dart
@@ -20,7 +20,7 @@ import 'package:wyatt_form_bloc/src/form/form.dart';
 /// {@template phone}
 /// Form input for a phone input.
 /// {@endtemplate}
-class Phone extends FormInput<String, ValidationError> {
+class Phone extends FormInputValidator<String, ValidationError> {
   /// {@macro phone}
   const Phone.pure() : super.pure('');
 
diff --git a/packages/wyatt_form_bloc/lib/src/validators/siren.dart b/packages/wyatt_form_bloc/lib/src/validators/siren.dart
index e0cea358..811fb4bd 100644
--- a/packages/wyatt_form_bloc/lib/src/validators/siren.dart
+++ b/packages/wyatt_form_bloc/lib/src/validators/siren.dart
@@ -20,7 +20,7 @@ import 'package:wyatt_form_bloc/src/form/form.dart';
 /// {@template siren}
 /// Form input for a SIREN input.
 /// {@endtemplate}
-class Siren extends FormInput<String, ValidationError> {
+class Siren extends FormInputValidator<String, ValidationError> {
   /// {@macro siren}
   const Siren.pure() : super.pure('');
 
diff --git a/packages/wyatt_form_bloc/lib/src/validators/text_string.dart b/packages/wyatt_form_bloc/lib/src/validators/text_string.dart
index 89ce6427..230f69e4 100644
--- a/packages/wyatt_form_bloc/lib/src/validators/text_string.dart
+++ b/packages/wyatt_form_bloc/lib/src/validators/text_string.dart
@@ -20,7 +20,7 @@ import 'package:wyatt_form_bloc/src/form/form.dart';
 /// {@template text_string}
 /// Form input for a text input
 /// {@endtemplate}
-class TextString extends FormInput<String, ValidationError> {
+class TextString extends FormInputValidator<String, ValidationError> {
   /// {@macro text_string}
   const TextString.pure() : super.pure('');
 
diff --git a/packages/wyatt_form_bloc/pubspec.yaml b/packages/wyatt_form_bloc/pubspec.yaml
index 8e6d0342..9232a917 100644
--- a/packages/wyatt_form_bloc/pubspec.yaml
+++ b/packages/wyatt_form_bloc/pubspec.yaml
@@ -4,14 +4,15 @@ repository: https://git.wyatt-studio.fr/Wyatt-FOSS/wyatt-packages/src/branch/mas
 version: 0.0.2
 
 environment:
-  sdk: '>=2.16.2 <3.0.0'
+  sdk: '>=2.17.2 <3.0.0'
 
 dependencies:
   bloc: ^8.0.3
+  equatable: ^2.0.3
   meta: ^1.7.0
 
 dev_dependencies:
-  test: ^1.21.0
+  test: ^1.21.4
 
   wyatt_analysis:
     git: