diff --git a/core/lib/Drupal/Core/Entity/Field/FieldDefinition.php b/core/lib/Drupal/Core/Entity/Field/FieldDefinition.php
new file mode 100644
index 0000000..5ff9247
--- /dev/null
+++ b/core/lib/Drupal/Core/Entity/Field/FieldDefinition.php
@@ -0,0 +1,107 @@
+<?php
+
+/**
+ * @file
+ * Contains \Drupal\Core\Entity\Field\FieldDefinition.
+ */
+
+namespace Drupal\Core\Entity\Field;
+
+/**
+ * @todo Document.
+ */
+class FieldDefinition implements FieldDefinitionInterface {
+
+  /**
+   * @todo Document.
+   *
+   * @var \Drupal\Core\Entity\Field\FieldInterface
+   */
+  protected $field;
+
+  /**
+   * @todo Document.
+   *
+   * @var array
+   */
+  protected $definition;
+
+  /**
+   * @todo Document.
+   */
+  public function __construct(FieldInterface $field) {
+    $this->field = $field;
+    $this->definition = $field->getDefinition() + \Drupal::typedData()->getDefinition($field->getType());
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function getFieldName() {
+    return $this->field->getName();
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function getFieldType() {
+     return $this->definition['field_type'];
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function getFieldSettings() {
+    return $this->definition['settings'];
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function getFieldSetting($setting_name) {
+    return $this->definition['settings'][$setting_name];
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function getFieldPropertyNames() {
+    return array_keys($this->field->getPropertyDefinitions());
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function isFieldTranslatable() {
+    return !empty($this->definition['translatable']);
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function getFieldLabel() {
+    return $this->definition['label'];
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function getFieldDescription() {
+    return $this->definition['description'];
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function getFieldCardinality() {
+    return isset($this->definition['cardinality']) ? $this->definition['cardinality'] : 1;
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function isFieldRequired() {
+    return !empty($this->definition['required']);
+  }
+
+}
diff --git a/core/lib/Drupal/Core/Entity/Field/FieldInterface.php b/core/lib/Drupal/Core/Entity/Field/FieldInterface.php
index c2dfbdb..4db0c48 100644
--- a/core/lib/Drupal/Core/Entity/Field/FieldInterface.php
+++ b/core/lib/Drupal/Core/Entity/Field/FieldInterface.php
@@ -28,6 +28,13 @@
 interface FieldInterface extends ListInterface, AccessibleInterface {
 
   /**
+   * Gets the field definition.
+   *
+   * @return \Drupal\Core\Entity\Field\FieldDefinitionInterface
+   */
+  public function getFieldDefinition();
+
+  /**
    * Filters out empty field items and re-numbers the item deltas.
    */
   public function filterEmptyValues();
diff --git a/core/lib/Drupal/Core/Entity/Field/FieldItemBase.php b/core/lib/Drupal/Core/Entity/Field/FieldItemBase.php
index 46a66b9..20b25cc 100644
--- a/core/lib/Drupal/Core/Entity/Field/FieldItemBase.php
+++ b/core/lib/Drupal/Core/Entity/Field/FieldItemBase.php
@@ -37,6 +37,13 @@ public function __construct(array $definition, $name = NULL, TypedDataInterface
   }
 
   /**
+   * {@inheritdoc}
+   */
+  public function getFieldDefinition() {
+    return $this->getParent()->getFieldDefinition();
+  }
+
+  /**
    * Overrides \Drupal\Core\TypedData\TypedData::setValue().
    *
    * @param array|null $values
diff --git a/core/lib/Drupal/Core/Entity/Field/FieldItemInterface.php b/core/lib/Drupal/Core/Entity/Field/FieldItemInterface.php
index 059a477..5d380a2 100644
--- a/core/lib/Drupal/Core/Entity/Field/FieldItemInterface.php
+++ b/core/lib/Drupal/Core/Entity/Field/FieldItemInterface.php
@@ -24,6 +24,13 @@
 interface FieldItemInterface extends ComplexDataInterface {
 
   /**
+   * Gets the field definition.
+   *
+   * @return \Drupal\Core\Entity\Field\FieldDefinitionInterface
+   */
+  public function getFieldDefinition();
+
+  /**
    * Magic method: Gets a property value.
    *
    * @param $property_name
diff --git a/core/lib/Drupal/Core/Entity/Field/Type/Field.php b/core/lib/Drupal/Core/Entity/Field/Type/Field.php
index 4d53c18..4b8186d 100644
--- a/core/lib/Drupal/Core/Entity/Field/Type/Field.php
+++ b/core/lib/Drupal/Core/Entity/Field/Type/Field.php
@@ -7,6 +7,7 @@
 
 namespace Drupal\Core\Entity\Field\Type;
 
+use Drupal\Core\Entity\Field\FieldDefinition;
 use Drupal\Core\Entity\Field\FieldInterface;
 use Drupal\Core\Session\AccountInterface;
 use Drupal\Core\TypedData\TypedDataInterface;
@@ -37,6 +38,13 @@ class Field extends ItemList implements FieldInterface {
   protected $list = array();
 
   /**
+   * The field definition.
+   *
+   * @var \Drupal\Core\Entity\Field\FieldDefinitionInterface
+   */
+  protected $fieldDefinition;
+
+  /**
    * Overrides TypedData::__construct().
    */
   public function __construct(array $definition, $name = NULL, TypedDataInterface $parent = NULL) {
@@ -51,6 +59,16 @@ public function __construct(array $definition, $name = NULL, TypedDataInterface
   /**
    * {@inheritdoc}
    */
+  public function getFieldDefinition() {
+    if (!isset($this->fieldDefinition)) {
+      $this->fieldDefinition = new FieldDefinition($this);
+    }
+    return $this->fieldDefinition;
+  }
+
+  /**
+   * {@inheritdoc}
+   */
   public function filterEmptyValues() {
     if (isset($this->list)) {
       $this->list = array_values(array_filter($this->list, function($item) {
diff --git a/core/lib/Drupal/Core/Entity/Plugin/DataType/FieldDataTypeDerivative.php b/core/lib/Drupal/Core/Entity/Plugin/DataType/FieldDataTypeDerivative.php
index 504e427..81fc77f 100644
--- a/core/lib/Drupal/Core/Entity/Plugin/DataType/FieldDataTypeDerivative.php
+++ b/core/lib/Drupal/Core/Entity/Plugin/DataType/FieldDataTypeDerivative.php
@@ -43,6 +43,16 @@ public function getDerivativeDefinitions(array $base_plugin_definition) {
       $definition['list class'] = $definition['list_class'];
       unset($definition['list_class']);
 
+      // Provide easy access to the field type without requiring consuming code
+      // to parse it from the full data type.
+      $definition['field_type'] = $plugin_id;
+
+      // The distinction between 'settings' and 'instance_settings' is only
+      // meaningful at the field type plugin level. At the Typed data API level,
+      // merge them.
+      $definition['settings'] = $definition['instance_settings'] + $definition['settings'];
+      unset($definition['instance_settings']);
+
       $this->derivatives[$plugin_id] = $definition;
     }
     return $this->derivatives;
diff --git a/core/modules/field/field.module b/core/modules/field/field.module
index 19bf6ed..0fa26dc 100644
--- a/core/modules/field/field.module
+++ b/core/modules/field/field.module
@@ -173,6 +173,9 @@ function field_theme() {
     'field' => array(
       'render element' => 'element',
     ),
+    'field__title' => array(
+      'base hook' => 'field',
+    ),
     'field_multiple_value_form' => array(
       'render element' => 'element',
     ),
@@ -1099,6 +1102,13 @@ function theme_field($variables) {
 }
 
 /**
+ * @todo Document.
+ */
+function theme_field__title($variables) {
+  return '<span' . $variables['attributes'] . '>' . drupal_render($variables['items']) . '</span>';
+}
+
+/**
  * Assembles a partial entity structure with initial IDs.
  *
  * @param stdClass $ids
diff --git a/core/modules/field/lib/Drupal/field/Plugin/Type/FieldType/ConfigField.php b/core/modules/field/lib/Drupal/field/Plugin/Type/FieldType/ConfigField.php
index 3134160..1e356b3 100644
--- a/core/modules/field/lib/Drupal/field/Plugin/Type/FieldType/ConfigField.php
+++ b/core/modules/field/lib/Drupal/field/Plugin/Type/FieldType/ConfigField.php
@@ -24,6 +24,13 @@ class ConfigField extends Field implements ConfigFieldInterface {
   protected $instance;
 
   /**
+   * @todo Document.
+   *
+   * @var array
+   */
+  protected $instances;
+
+  /**
    * {@inheritdoc}
    */
   public function __construct(array $definition, $name = NULL, TypedDataInterface $parent = NULL) {
@@ -37,9 +44,14 @@ public function __construct(array $definition, $name = NULL, TypedDataInterface
    * {@inheritdoc}
    */
   public function getInstance() {
-    if (!isset($this->instance) && $parent = $this->getParent()) {
-      $instances = FieldAPI::fieldInfo()->getBundleInstances($parent->entityType(), $parent->bundle());
-      $this->instance = $instances[$this->getName()];
+    if (!isset($this->instance)) {
+      if (!isset($this->instances) && $parent = $this->getParent()) {
+        $this->instances = FieldAPI::fieldInfo()->getBundleInstances($parent->entityType(), $parent->bundle());
+      }
+      $field_name = $this->getName();
+      if (isset($this->instances[$field_name])) {
+        $this->instance = $this->instances[$field_name];
+      }
     }
     return $this->instance;
   }
@@ -47,18 +59,25 @@ public function getInstance() {
   /**
    * {@inheritdoc}
    */
+  public function getFieldDefinition() {
+    return $this->getInstance() ?: parent::getFieldDefinition();
+  }
+
+  /**
+   * {@inheritdoc}
+   */
   public function getConstraints() {
     $constraints = array();
     // Check that the number of values doesn't exceed the field cardinality. For
     // form submitted values, this can only happen with 'multiple value'
     // widgets.
-    $cardinality = $this->getInstance()->getField()->cardinality;
+    $cardinality = $this->getFieldDefinition()->getFieldCardinality();
     if ($cardinality != FIELD_CARDINALITY_UNLIMITED) {
       $constraints[] = \Drupal::typedData()
         ->getValidationConstraintManager()
         ->create('Count', array(
           'max' => $cardinality,
-          'maxMessage' => t('%name: this field cannot hold more than @count values.', array('%name' => $this->getInstance()->label, '@count' => $cardinality)),
+          'maxMessage' => t('%name: this field cannot hold more than @count values.', array('%name' => $this->getFieldDefinition()->getFieldLabel(), '@count' => $cardinality)),
         ));
     }
 
diff --git a/core/modules/field/lib/Drupal/field/Plugin/Type/Formatter/FormatterBase.php b/core/modules/field/lib/Drupal/field/Plugin/Type/Formatter/FormatterBase.php
index fa780a5..b6e70f7 100644
--- a/core/modules/field/lib/Drupal/field/Plugin/Type/Formatter/FormatterBase.php
+++ b/core/modules/field/lib/Drupal/field/Plugin/Type/Formatter/FormatterBase.php
@@ -134,7 +134,7 @@ protected function checkFieldAccess($op, $entity) {
       return field_access($op, $field, $entity->entityType(), $entity);
     }
     else {
-      return FALSE;
+      return TRUE;
     }
   }
 
diff --git a/core/modules/field/lib/Drupal/field/Plugin/Type/Formatter/FormatterPluginManager.php b/core/modules/field/lib/Drupal/field/Plugin/Type/Formatter/FormatterPluginManager.php
index 39deee9..3235a6d 100644
--- a/core/modules/field/lib/Drupal/field/Plugin/Type/Formatter/FormatterPluginManager.php
+++ b/core/modules/field/lib/Drupal/field/Plugin/Type/Formatter/FormatterPluginManager.php
@@ -12,7 +12,7 @@
 use Drupal\Core\Plugin\Discovery\CacheDecorator;
 use Drupal\Core\Plugin\Discovery\AnnotatedClassDiscovery;
 use Drupal\Core\Plugin\Discovery\AlterDecorator;
-use Drupal\field\Plugin\Core\Entity\FieldInstance;
+use Drupal\Core\Entity\Field\FieldInterface;
 
 /**
  * Plugin type manager for field formatters.
@@ -175,4 +175,31 @@ public function getDefaultSettings($type) {
     return isset($info['settings']) ? $info['settings'] : array();
   }
 
+  /**
+   * @todo Document.
+   */
+  public function viewBaseField(FieldInterface $field) {
+    $options = array(
+      'field_definition' => $field->getFieldDefinition(),
+      'view_mode' => 'default',
+      'configuration' => array(
+        'label' => 'hidden',
+      ),
+    );
+    $formatter = $this->getInstance($options);
+
+    $entity = $field->getParent()->getBCEntity();
+    $entity_id = $entity->id();
+    $langcode = $entity->language()->langcode;
+    $items = $field->getValue();
+
+    $items_multi = array($entity_id => $items);
+    $formatter->prepareView(array($entity_id => $entity), $langcode, $items_multi);
+    $items = $items_multi[$entity_id];
+
+    $result = $formatter->view($entity, $langcode, $items);
+    $field_name = $field->getName();
+    return isset($result[$field_name]) ? $result[$field_name] : array();
+  }
+
 }
diff --git a/core/modules/field/lib/Drupal/field/Plugin/Type/Widget/WidgetBase.php b/core/modules/field/lib/Drupal/field/Plugin/Type/Widget/WidgetBase.php
index 654cbbe..e0c2432 100644
--- a/core/modules/field/lib/Drupal/field/Plugin/Type/Widget/WidgetBase.php
+++ b/core/modules/field/lib/Drupal/field/Plugin/Type/Widget/WidgetBase.php
@@ -449,7 +449,7 @@ protected function checkFieldAccess($op, $entity) {
       return field_access($op, $field, $entity->entityType(), $entity);
     }
     else {
-      return FALSE;
+      return TRUE;
     }
   }
 
diff --git a/core/modules/field/lib/Drupal/field/Plugin/Type/Widget/WidgetPluginManager.php b/core/modules/field/lib/Drupal/field/Plugin/Type/Widget/WidgetPluginManager.php
index b8213ca..9712d37 100644
--- a/core/modules/field/lib/Drupal/field/Plugin/Type/Widget/WidgetPluginManager.php
+++ b/core/modules/field/lib/Drupal/field/Plugin/Type/Widget/WidgetPluginManager.php
@@ -12,6 +12,7 @@
 use Drupal\Core\Plugin\Discovery\CacheDecorator;
 use Drupal\Core\Plugin\Discovery\AlterDecorator;
 use Drupal\Core\Plugin\Discovery\AnnotatedClassDiscovery;
+use Drupal\Core\Entity\Field\FieldInterface;
 
 /**
  * Plugin type manager for field widgets.
@@ -176,4 +177,44 @@ public function getDefaultSettings($type) {
     return isset($info['settings']) ? $info['settings'] : array();
   }
 
+  /**
+   * @todo Document.
+   */
+  public function baseFieldForm(FieldInterface $field, array &$form, array &$form_state) {
+    $options = array(
+      'field_definition' => $field->getFieldDefinition(),
+      'form_mode' => 'default',
+      'configuration' => array(),
+    );
+    $widget = $this->getInstance($options);
+
+    $entity = $field->getParent()->getBCEntity();
+    $langcode = $entity->language()->langcode;
+    $items = $field->getValue();
+
+    $form += array('#parents' => array());
+    $result = $widget->form($entity, $langcode, $items, $form, $form_state);
+    $field_name = $field->getName();
+    return isset($result[$field_name]) ? $result[$field_name] : array();
+  }
+
+  /**
+   * @todo Document.
+   */
+  public function baseFieldExtractFormValues(FieldInterface $field, array &$form, array &$form_state) {
+    $options = array(
+      'field_definition' => $field->getFieldDefinition(),
+      'form_mode' => 'default',
+      'configuration' => array(),
+    );
+    $widget = $this->getInstance($options);
+
+    $entity = $field->getParent()->getBCEntity();
+    $langcode = $entity->language()->langcode;
+    $items = $field->getValue();
+
+    $widget->extractFormValues($entity, $langcode, $items, $form, $form_state);
+    $field->setValue($items);
+  }
+
 }
diff --git a/core/modules/node/lib/Drupal/node/NodeFormController.php b/core/modules/node/lib/Drupal/node/NodeFormController.php
index 2c362b6..34f3527 100644
--- a/core/modules/node/lib/Drupal/node/NodeFormController.php
+++ b/core/modules/node/lib/Drupal/node/NodeFormController.php
@@ -114,8 +114,9 @@ public function form(array $form, array &$form_state) {
         '#required' => TRUE,
         '#default_value' => $node->title,
         '#maxlength' => 255,
-        '#weight' => -5,
       );
+      $form['title'] = \Drupal::service('plugin.manager.field.widget')->baseFieldForm($node->getNGEntity()->title, $form, $form_state);
+      $form['title']['#weight'] = -5;
     }
 
     $language_configuration = module_invoke('language', 'get_default_configuration', 'node', $node->type);
@@ -329,6 +330,15 @@ protected function actions(array $form, array &$form_state) {
   }
 
   /**
+   * {@inheritdoc}
+   */
+  public function buildEntity(array $form, array &$form_state) {
+    $node = parent::buildEntity($form, $form_state);
+    \Drupal::service('plugin.manager.field.widget')->baseFieldExtractFormValues($node->getNGEntity()->title, $form, $form_state);
+    return $node;
+  }
+
+  /**
    * Overrides Drupal\Core\Entity\EntityFormController::validate().
    */
   public function validate(array $form, array &$form_state) {
diff --git a/core/modules/node/lib/Drupal/node/NodeStorageController.php b/core/modules/node/lib/Drupal/node/NodeStorageController.php
index 524036b..32245ad 100644
--- a/core/modules/node/lib/Drupal/node/NodeStorageController.php
+++ b/core/modules/node/lib/Drupal/node/NodeStorageController.php
@@ -154,7 +154,8 @@ public function baseFieldDefinitions() {
     $properties['title'] = array(
       'label' => t('Title'),
       'description' => t('The title of this node, always treated as non-markup plain text.'),
-      'type' => 'string_field',
+      'type' => 'field_item:text',
+      'required' => TRUE,
     );
     $properties['uid'] = array(
       'label' => t('User ID'),
diff --git a/core/modules/node/lib/Drupal/node/Tests/Condition/NodeConditionTest.php b/core/modules/node/lib/Drupal/node/Tests/Condition/NodeConditionTest.php
index 31d515f..6ee7d48 100644
--- a/core/modules/node/lib/Drupal/node/Tests/Condition/NodeConditionTest.php
+++ b/core/modules/node/lib/Drupal/node/Tests/Condition/NodeConditionTest.php
@@ -14,7 +14,7 @@
  */
 class NodeConditionTest extends DrupalUnitTestBase {
 
-  public static $modules = array('system', 'node', 'field');
+  public static $modules = array('system', 'node', 'field', 'text');
 
   public static function getInfo() {
     return array(
diff --git a/core/modules/node/lib/Drupal/node/Tests/NodeTitleTest.php b/core/modules/node/lib/Drupal/node/Tests/NodeTitleTest.php
index e03e4b0..0deff22 100644
--- a/core/modules/node/lib/Drupal/node/Tests/NodeTitleTest.php
+++ b/core/modules/node/lib/Drupal/node/Tests/NodeTitleTest.php
@@ -59,7 +59,7 @@ function testNodeTitle() {
     $this->assertEqual(current($this->xpath($xpath)), $node->label(), 'Node breadcrumb is equal to node title.', 'Node');
 
     // Test node title in comment preview.
-    $this->assertEqual(current($this->xpath('//article[@id=:id]/h2/a', array(':id' => 'node-' . $node->nid))), $node->label(), 'Node preview title is equal to node title.', 'Node');
+    $this->assertEqual(current($this->xpath('//article[@id=:id]/h2/a/span', array(':id' => 'node-' . $node->nid))), $node->label(), 'Node preview title is equal to node title.', 'Node');
 
     // Test node title is clickable on teaser list (/node).
     $this->drupalGet('node');
diff --git a/core/modules/node/node.module b/core/modules/node/node.module
index d9a365d..8d15206 100644
--- a/core/modules/node/node.module
+++ b/core/modules/node/node.module
@@ -746,7 +746,7 @@ function template_preprocess_node(&$variables) {
 
   $uri = $node->uri();
   $variables['node_url']  = url($uri['path'], $uri['options']);
-  $variables['label'] = check_plain($node->label());
+  $variables['label'] = Drupal::service('plugin.manager.field.formatter')->viewBaseField($node->getNGEntity()->title);
   $variables['page'] = $variables['view_mode'] == 'full' && node_is_page($node);
 
   // Helpful $content variable for templates.
diff --git a/core/modules/rdf/rdf.module b/core/modules/rdf/rdf.module
index 526ef66..bb29703 100644
--- a/core/modules/rdf/rdf.module
+++ b/core/modules/rdf/rdf.module
@@ -315,7 +315,7 @@ function rdf_preprocess_node(&$variables) {
     $element = array(
       '#tag' => 'meta',
       '#attributes' => array(
-        'content' => $variables['label'],
+        'content' => $variables['node']->label(),
         'about' => $variables['node_url'],
       ),
     );
diff --git a/core/modules/simpletest/lib/Drupal/simpletest/WebTestBase.php b/core/modules/simpletest/lib/Drupal/simpletest/WebTestBase.php
index 8e295b3..1ca7dbe 100644
--- a/core/modules/simpletest/lib/Drupal/simpletest/WebTestBase.php
+++ b/core/modules/simpletest/lib/Drupal/simpletest/WebTestBase.php
@@ -2048,7 +2048,7 @@ protected function assertNoLinkByHref($href, $message = '', $group = 'Other') {
    */
   protected function clickLink($label, $index = 0) {
     $url_before = $this->getUrl();
-    $urls = $this->xpath('//a[normalize-space(text())=:label]', array(':label' => $label));
+    $urls = $this->xpath('//a[normalize-space()=:label]', array(':label' => $label));
 
     if (isset($urls[$index])) {
       $url_target = $this->getAbsoluteUrl($urls[$index]['href']);
diff --git a/core/modules/system/lib/Drupal/system/Tests/Plugin/ContextPluginTest.php b/core/modules/system/lib/Drupal/system/Tests/Plugin/ContextPluginTest.php
index b04e2d8..cb8ec55 100644
--- a/core/modules/system/lib/Drupal/system/Tests/Plugin/ContextPluginTest.php
+++ b/core/modules/system/lib/Drupal/system/Tests/Plugin/ContextPluginTest.php
@@ -17,7 +17,7 @@
  */
 class ContextPluginTest extends DrupalUnitTestBase {
 
-  public static $modules = array('system', 'user', 'node');
+  public static $modules = array('system', 'user', 'node', 'text');
 
   public static function getInfo() {
     return array(
diff --git a/core/modules/text/lib/Drupal/text/Plugin/field/field_type/TextItem.php b/core/modules/text/lib/Drupal/text/Plugin/field/field_type/TextItem.php
index 26326fc..1c79cf7 100644
--- a/core/modules/text/lib/Drupal/text/Plugin/field/field_type/TextItem.php
+++ b/core/modules/text/lib/Drupal/text/Plugin/field/field_type/TextItem.php
@@ -63,6 +63,27 @@ public static function schema(Field $field) {
   /**
    * {@inheritdoc}
    */
+  public function getConstraints() {
+    $constraint_manager = \Drupal::typedData()->getValidationConstraintManager();
+    $constraints = parent::getConstraints();
+
+    if ($max_length = $this->getFieldDefinition()->getFieldSetting('max_length')) {
+      $constraints[] = $constraint_manager->create('ComplexData', array(
+        'value' => array(
+          'Length' => array(
+            'max' => $max_length,
+            'maxMessage' => t('%name: the text may not be longer than @max characters.', array('%name' => $this->getFieldDefinition()->getFieldLabel(), '@max' => $max_length)),
+          )
+        ),
+      ));
+    }
+
+    return $constraints;
+  }
+
+  /**
+   * {@inheritdoc}
+   */
   public function settingsForm(array $form, array &$form_state) {
     $element = array();
     $field = $this->getInstance()->getField();
diff --git a/core/modules/text/lib/Drupal/text/Plugin/field/field_type/TextItemBase.php b/core/modules/text/lib/Drupal/text/Plugin/field/field_type/TextItemBase.php
index 17f2ba3..e16f961 100644
--- a/core/modules/text/lib/Drupal/text/Plugin/field/field_type/TextItemBase.php
+++ b/core/modules/text/lib/Drupal/text/Plugin/field/field_type/TextItemBase.php
@@ -70,38 +70,17 @@ public function isEmpty() {
   /**
    * {@inheritdoc}
    */
-  public function getConstraints() {
-    $constraint_manager = \Drupal::typedData()->getValidationConstraintManager();
-    $constraints = parent::getConstraints();
-
-    if (!empty($this->getInstance()->getField()->settings['max_length'])) {
-      $max_length = $this->getInstance()->getField()->settings['max_length'];
-      $constraints[] = $constraint_manager->create('ComplexData', array(
-        'value' => array(
-          'Length' => array(
-            'max' => $max_length,
-            'maxMessage' => t('%name: the text may not be longer than @max characters.', array('%name' => $this->getInstance()->label, '@max' => $max_length)),
-          )
-        ),
-      ));
-    }
-
-    return $constraints;
-  }
-
-  /**
-   * {@inheritdoc}
-   */
   public function prepareCache() {
     // Where possible, generate the sanitized version of each field early so
     // that it is cached in the field cache. This avoids the need to look up the
     // field in the filter cache separately.
-    if (!$this->getInstance()->settings['text_processing'] || filter_format_allowcache($this->get('format')->getValue())) {
+    $text_processing = $this->getFieldDefinition()->getFieldSetting('text_processing');
+    if (!$text_processing || filter_format_allowcache($this->get('format')->getValue())) {
       $itemBC = $this->getValue();
       $langcode = $this->getParent()->getParent()->language()->langcode;
-      $this->set('safe_value', text_sanitize($this->getInstance()->settings['text_processing'], $langcode, $itemBC, 'value'));
+      $this->set('safe_value', text_sanitize($text_processing, $langcode, $itemBC, 'value'));
       if ($this->getType() == 'field_item:text_with_summary') {
-        $this->set('safe_summary', text_sanitize($this->getInstance()->settings['text_processing'], $langcode, $itemBC, 'summary'));
+        $this->set('safe_summary', text_sanitize($text_processing, $langcode, $itemBC, 'summary'));
       }
     }
   }
diff --git a/core/modules/text/lib/Drupal/text/Plugin/field/field_type/TextWithSummaryItem.php b/core/modules/text/lib/Drupal/text/Plugin/field/field_type/TextWithSummaryItem.php
index 4d9030d..7aecf67 100644
--- a/core/modules/text/lib/Drupal/text/Plugin/field/field_type/TextWithSummaryItem.php
+++ b/core/modules/text/lib/Drupal/text/Plugin/field/field_type/TextWithSummaryItem.php
@@ -106,28 +106,6 @@ public function isEmpty() {
   /**
    * {@inheritdoc}
    */
-  public function getConstraints() {
-    $constraint_manager = \Drupal::typedData()->getValidationConstraintManager();
-    $constraints = parent::getConstraints();
-
-    if (!empty($this->getInstance()->getField()->settings['max_length'])) {
-      $max_length = $this->getInstance()->getField()->settings['max_length'];
-      $constraints[] = $constraint_manager->create('ComplexData', array(
-        'summary' => array(
-          'Length' => array(
-            'max' => $max_length,
-            'maxMessage' => t('%name: the summary may not be longer than @max characters.', array('%name' => $this->getInstance()->label, '@max' => $max_length)),
-          )
-        ),
-      ));
-    }
-
-    return $constraints;
-  }
-
-  /**
-   * {@inheritdoc}
-   */
   public function instanceSettingsForm(array $form, array &$form_state) {
     $element = array();