diff --git a/core/lib/Drupal/Core/Entity/Entity.php b/core/lib/Drupal/Core/Entity/Entity.php
index 7712bf1..6c3c150 100644
--- a/core/lib/Drupal/Core/Entity/Entity.php
+++ b/core/lib/Drupal/Core/Entity/Entity.php
@@ -425,40 +425,15 @@ public function getNGEntity() {
   }
 
   /**
-   * Implements \Drupal\Core\TypedData\TypedDataInterface::getType().
-   */
-  public function getType() {
-    // @todo: Incorporate the entity type here by making entities proper
-    // typed data. See http://drupal.org/node/1868004.
-    return 'entity';
-  }
-
-  /**
    * Implements \Drupal\Core\TypedData\TypedDataInterface::getDefinition().
    */
   public function getDefinition() {
     return array(
-      'type' => $this->getType()
+      'type' => 'entity',
     );
   }
 
   /**
-   * Implements \Drupal\Core\TypedData\TypedDataInterface::getValue().
-   */
-  public function getValue() {
-    // @todo: Implement by making entities proper typed data. See
-    // http://drupal.org/node/1868004.
-  }
-
-  /**
-   * Implements \Drupal\Core\TypedData\TypedDataInterface::setValue().
-   */
-  public function setValue($value, $notify = TRUE) {
-    // @todo: Implement by making entities proper typed data. See
-    // http://drupal.org/node/1868004.
-  }
-
-  /**
    * Implements \Drupal\Core\TypedData\TypedDataInterface::getString().
    */
   public function getString() {
@@ -467,7 +442,7 @@ public function getString() {
   }
 
   /**
-   * Implements \Drupal\Core\TypedData\TypedDataInterface::getConstraints().
+   * {@inheritdoc}
    */
   public function getConstraints() {
     // @todo: Implement by making entities proper typed data. See
@@ -476,7 +451,7 @@ public function getConstraints() {
   }
 
   /**
-   * Implements \Drupal\Core\TypedData\TypedDataInterface::validate().
+   * {@inheritdoc}
    */
   public function validate() {
     // @todo: Implement by making entities proper typed data. See
diff --git a/core/lib/Drupal/Core/Entity/EntityBCDecorator.php b/core/lib/Drupal/Core/Entity/EntityBCDecorator.php
index 52d3f6f..68a5b7e 100644
--- a/core/lib/Drupal/Core/Entity/EntityBCDecorator.php
+++ b/core/lib/Drupal/Core/Entity/EntityBCDecorator.php
@@ -431,13 +431,6 @@ public function getTranslation($langcode) {
   /**
    * Forwards the call to the decorated entity.
    */
-  public function getType() {
-    return $this->decorated->getType();
-  }
-
-  /**
-   * Forwards the call to the decorated entity.
-   */
   public function getDefinition() {
     return $this->decorated->getDefinition();
   }
diff --git a/core/lib/Drupal/Core/Entity/EntityNG.php b/core/lib/Drupal/Core/Entity/EntityNG.php
index 3d0c5c6..f55a4ce 100644
--- a/core/lib/Drupal/Core/Entity/EntityNG.php
+++ b/core/lib/Drupal/Core/Entity/EntityNG.php
@@ -168,15 +168,6 @@ public function __construct(array $values, $entity_type, $bundle = FALSE, $trans
   }
 
   /**
-   * Gets the typed data type of the entity.
-   *
-   * @return string
-   */
-  public function getType() {
-    return $this->entityType;
-  }
-
-  /**
    * Initialize the object. Invoked upon construction and wake up.
    */
   protected function init() {
diff --git a/core/lib/Drupal/Core/TypedData/ComplexDataInterface.php b/core/lib/Drupal/Core/TypedData/ComplexDataInterface.php
index 595064e..6f4c9dd 100644
--- a/core/lib/Drupal/Core/TypedData/ComplexDataInterface.php
+++ b/core/lib/Drupal/Core/TypedData/ComplexDataInterface.php
@@ -21,7 +21,7 @@
  * When implementing this interface which extends Traversable, make sure to list
  * IteratorAggregate or Iterator before this interface in the implements clause.
  */
-interface ComplexDataInterface extends Traversable, TypedDataInterface  {
+interface ComplexDataInterface extends Traversable, TypedDataInterface, ContextAwareInterface  {
 
   /**
    * Gets a property object.
diff --git a/core/lib/Drupal/Core/TypedData/ContextAwareInterface.php b/core/lib/Drupal/Core/TypedData/ContextAwareInterface.php
new file mode 100644
index 0000000..2ca7aa8
--- /dev/null
+++ b/core/lib/Drupal/Core/TypedData/ContextAwareInterface.php
@@ -0,0 +1,72 @@
+<?php
+
+/**
+ * @file
+ * Contains \Drupal\Core\TypedData\ContextAwareInterface.
+ */
+
+namespace Drupal\Core\TypedData;
+
+/**
+ * Interface for typed data objects that are aware of its own property name and
+ * parent context.
+ */
+interface ContextAwareInterface {
+
+  /**
+   * Returns the name of a property or item.
+   *
+   * @return string
+   *   If the data is a property of some complex data, the name of the property.
+   *   If the data is an item of a list, the name is the numeric position of the
+   *   item in the list, starting with 0. Otherwise, NULL is returned.
+   */
+  public function getName();
+
+  /**
+   * Returns the parent data structure; i.e. either complex data or a list.
+   *
+   * @return \Drupal\Core\TypedData\ComplexDataInterface|\Drupal\Core\TypedData\ListInterface
+   *   The parent data structure, either complex data or a list; or NULL if this
+   *   is the root of the typed data tree.
+   */
+  public function getParent();
+
+  /**
+   * Returns the root of the typed data tree.
+   *
+   * Returns the root data for a tree of typed data objects; e.g. for an entity
+   * field item the root of the tree is its parent entity object.
+   *
+   * @return \Drupal\Core\TypedData\ComplexDataInterface|\Drupal\Core\TypedData\ListInterface
+   *   The root data structure, either complex data or a list.
+   */
+  public function getRoot();
+
+  /**
+   * Returns the property path of the data.
+   *
+   * The trail of property names relative to the root of the typed data tree,
+   * separated by dots; e.g. 'field_text.0.format'.
+   *
+   * @return string
+   *   The property path relative to the root of the typed tree, or an empty
+   *   string if this is the root.
+   */
+  public function getPropertyPath();
+
+  /**
+   * Sets the context of a property or item via a context aware parent.
+   *
+   * This method is supposed to be called by the factory only.
+   *
+   * @param string $name
+   *   (optional) The name of the property or the delta of the list item,
+   *   or NULL if it is the root of a typed data tree. Defaults to NULL.
+   * @param \Drupal\Core\TypedData\TypedDataInterface $parent
+   *   (optional) The parent object of the data property, or NULL if it is the
+   *   root of a typed data tree. Defaults to NULL.
+   */
+  public function setContext($name = NULL, TypedDataInterface $parent = NULL);
+
+}
diff --git a/core/lib/Drupal/Core/TypedData/Plugin/DataType/Any.php b/core/lib/Drupal/Core/TypedData/Plugin/DataType/Any.php
index 9236b22..dc76a9e 100644
--- a/core/lib/Drupal/Core/TypedData/Plugin/DataType/Any.php
+++ b/core/lib/Drupal/Core/TypedData/Plugin/DataType/Any.php
@@ -10,20 +10,20 @@
 use Drupal\Core\TypedData\Annotation\DataType;
 use Drupal\Core\Annotation\Translation;
 use Drupal\Core\TypedData\TypedData;
+use \Drupal\Core\TypedData\PrimitiveBase;
 
 /**
  * The "any" data type.
  *
- * The "any" data type does not implement a list or complex data interface, nor
- * is it mappable to any primitive type. Thus, it may contain any PHP data for
- * which no further metadata is available.
+ * The "any" data type is primitive in the sense that it can be any PHP type and
+ * doesn't come with further meta data about its value.
  *
  * @DataType(
  *   id = "any",
  *   label = @Translation("Any data")
  * )
  */
-class Any extends TypedData {
+class Any extends PrimitiveBase {
 
   /**
    * The data value.
diff --git a/core/lib/Drupal/Core/TypedData/PrimitiveBase.php b/core/lib/Drupal/Core/TypedData/PrimitiveBase.php
index 1ba9319..36b831f 100644
--- a/core/lib/Drupal/Core/TypedData/PrimitiveBase.php
+++ b/core/lib/Drupal/Core/TypedData/PrimitiveBase.php
@@ -36,4 +36,11 @@ public function setValue($value, $notify = TRUE) {
     }
     $this->value = $value;
   }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function getString() {
+    return (string) $this->getValue();
+  }
 }
diff --git a/core/lib/Drupal/Core/TypedData/PrimitiveInterface.php b/core/lib/Drupal/Core/TypedData/PrimitiveInterface.php
index b2293e2..35f16bd 100644
--- a/core/lib/Drupal/Core/TypedData/PrimitiveInterface.php
+++ b/core/lib/Drupal/Core/TypedData/PrimitiveInterface.php
@@ -10,7 +10,7 @@
 /**
  * Interface for primitive data.
  */
-interface PrimitiveInterface {
+interface PrimitiveInterface extends StringableInterface {
 
   /**
    * Gets the primitive data value.
diff --git a/core/lib/Drupal/Core/TypedData/StringableInterface.php b/core/lib/Drupal/Core/TypedData/StringableInterface.php
new file mode 100644
index 0000000..06b9064
--- /dev/null
+++ b/core/lib/Drupal/Core/TypedData/StringableInterface.php
@@ -0,0 +1,22 @@
+<?php
+
+/**
+ * @file
+ * Contains \Drupal\Core\TypedData\StringableInterface.
+ */
+
+namespace Drupal\Core\TypedData;
+
+/**
+ * Interface for casting a typed data value to a string.
+ */
+interface StringableInterface {
+
+  /**
+   * Returns a string representation of the data.
+   *
+   * @return string
+   */
+  public function getString();
+
+}
diff --git a/core/lib/Drupal/Core/TypedData/TypedData.php b/core/lib/Drupal/Core/TypedData/TypedData.php
index 8bfa215..f0a2063 100644
--- a/core/lib/Drupal/Core/TypedData/TypedData.php
+++ b/core/lib/Drupal/Core/TypedData/TypedData.php
@@ -15,7 +15,7 @@
  * Classes deriving from this base class have to declare $value
  * or override getValue() or setValue().
  */
-abstract class TypedData implements TypedDataInterface, PluginInspectionInterface {
+abstract class TypedData implements TypedDataInterface, PluginInspectionInterface, ValidatableInterface, ContextAwareInterface {
 
   /**
    * The data definition.
@@ -59,13 +59,6 @@ public function __construct(array $definition, $name = NULL, TypedDataInterface
   }
 
   /**
-   * Implements \Drupal\Core\TypedData\TypedDataInterface::getType().
-   */
-  public function getType() {
-    return $this->definition['type'];
-  }
-
-  /**
    * {@inheritdoc}
    */
   public function getPluginId() {
@@ -87,32 +80,7 @@ public function getDefinition() {
   }
 
   /**
-   * Implements \Drupal\Core\TypedData\TypedDataInterface::getValue().
-   */
-  public function getValue() {
-    return $this->value;
-  }
-
-  /**
-   * Implements \Drupal\Core\TypedData\TypedDataInterface::setValue().
-   */
-  public function setValue($value, $notify = TRUE) {
-    // Notify the parent of any changes to be made.
-    if ($notify && isset($this->parent)) {
-      $this->parent->onChange($this->name);
-    }
-    $this->value = $value;
-  }
-
-  /**
-   * Implements \Drupal\Core\TypedData\TypedDataInterface::getString().
-   */
-  public function getString() {
-    return (string) $this->getValue();
-  }
-
-  /**
-   * Implements \Drupal\Core\TypedData\TypedDataInterface::getConstraints().
+   * {@inheritdoc}
    */
   public function getConstraints() {
     // @todo: Add the typed data manager as proper dependency.
@@ -120,7 +88,7 @@ public function getConstraints() {
   }
 
   /**
-   * Implements \Drupal\Core\TypedData\TypedDataInterface::validate().
+   * {@inheritdoc}
    */
   public function validate() {
     // @todo: Add the typed data manager as proper dependency.
@@ -137,7 +105,7 @@ public function applyDefaultValue($notify = TRUE) {
   }
 
   /**
-   * Implements \Drupal\Core\TypedData\TypedDataInterface::setContext().
+   * {@inheritdoc}
    */
   public function setContext($name = NULL, TypedDataInterface $parent = NULL) {
     $this->parent = $parent;
@@ -145,14 +113,14 @@ public function setContext($name = NULL, TypedDataInterface $parent = NULL) {
   }
 
   /**
-   * Implements \Drupal\Core\TypedData\TypedDataInterface::getName().
+   * {@inheritdoc}
    */
   public function getName() {
     return $this->name;
   }
 
   /**
-   * Implements \Drupal\Core\TypedData\TypedDataInterface::getRoot().
+   * {@inheritdoc}
    */
   public function getRoot() {
     if (isset($this->parent)) {
@@ -163,7 +131,7 @@ public function getRoot() {
   }
 
   /**
-   * Implements \Drupal\Core\TypedData\TypedDataInterface::getPropertyPath().
+   * {@inheritdoc}
    */
   public function getPropertyPath() {
     if (isset($this->parent)) {
@@ -181,9 +149,7 @@ public function getPropertyPath() {
   }
 
   /**
-   * Implements \Drupal\Core\TypedData\TypedDataInterface::getParent().
-   *
-   * @return \Drupal\Core\Entity\Field\FieldInterface
+   * {@inheritdoc}
    */
   public function getParent() {
     return $this->parent;
diff --git a/core/lib/Drupal/Core/TypedData/TypedDataInterface.php b/core/lib/Drupal/Core/TypedData/TypedDataInterface.php
index 96229b6..3f7feaa 100644
--- a/core/lib/Drupal/Core/TypedData/TypedDataInterface.php
+++ b/core/lib/Drupal/Core/TypedData/TypedDataInterface.php
@@ -7,22 +7,12 @@
 
 namespace Drupal\Core\TypedData;
 
-use Drupal\user;
-
 /**
  * Interface for typed data objects.
  */
 interface TypedDataInterface {
 
   /**
-   * Gets the data type.
-   *
-   * @return string
-   *   The data type of the wrapped data.
-   */
-  public function getType();
-
-  /**
    * Gets the data definition.
    *
    * @return array
@@ -31,54 +21,6 @@ public function getType();
   public function getDefinition();
 
   /**
-   * Gets the data value.
-   *
-   * @return mixed
-   */
-  public function getValue();
-
-  /**
-   * Sets the data value.
-   *
-   * @param mixed|null $value
-   *   The value to set in the format as documented for the data type or NULL to
-   *   unset the data value.
-   * @param bool $notify
-   *   (optional) Whether to notify the parent object of the change. Defaults to
-   *   TRUE. If a property is updated from a parent object, set it to FALSE to
-   *   avoid being notified again.
-   *
-   * @throws \Drupal\Core\TypedData\ReadOnlyException
-   *   If the data is read-only.
-   */
-  public function setValue($value, $notify = TRUE);
-
-  /**
-   * Returns a string representation of the data.
-   *
-   * @return string
-   */
-  public function getString();
-
-  /**
-   * Gets a list of validation constraints.
-   *
-   * @return array
-   *   Array of constraints, each being an instance of
-   *   \Symfony\Component\Validator\Constraint.
-   */
-  public function getConstraints();
-
-  /**
-   * Validates the currently set data value.
-   *
-   * @return \Symfony\Component\Validator\ConstraintViolationListInterface
-   *   A list of constraint violations. If the list is empty, validation
-   *   succeeded.
-   */
-  public function validate();
-
-  /**
    * Applies the default value.
    *
    * @param bool $notify
@@ -90,60 +32,4 @@ public function validate();
    *   Returns itself to allow for chaining.
    */
   public function applyDefaultValue($notify = TRUE);
-
-  /**
-   * Returns the name of a property or item.
-   *
-   * @return string
-   *   If the data is a property of some complex data, the name of the property.
-   *   If the data is an item of a list, the name is the numeric position of the
-   *   item in the list, starting with 0. Otherwise, NULL is returned.
-   */
-  public function getName();
-
-  /**
-   * Returns the parent data structure; i.e. either complex data or a list.
-   *
-   * @return \Drupal\Core\TypedData\ComplexDataInterface|\Drupal\Core\TypedData\ListInterface
-   *   The parent data structure, either complex data or a list; or NULL if this
-   *   is the root of the typed data tree.
-   */
-  public function getParent();
-
-  /**
-   * Returns the root of the typed data tree.
-   *
-   * Returns the root data for a tree of typed data objects; e.g. for an entity
-   * field item the root of the tree is its parent entity object.
-   *
-   * @return \Drupal\Core\TypedData\ComplexDataInterface|\Drupal\Core\TypedData\ListInterface
-   *   The root data structure, either complex data or a list.
-   */
-  public function getRoot();
-
-  /**
-   * Returns the property path of the data.
-   *
-   * The trail of property names relative to the root of the typed data tree,
-   * separated by dots; e.g. 'field_text.0.format'.
-   *
-   * @return string
-   *   The property path relative to the root of the typed tree, or an empty
-   *   string if this is the root.
-   */
-  public function getPropertyPath();
-
-  /**
-   * Sets the context of a property or item via a context aware parent.
-   *
-   * This method is supposed to be called by the factory only.
-   *
-   * @param string $name
-   *   (optional) The name of the property or the delta of the list item,
-   *   or NULL if it is the root of a typed data tree. Defaults to NULL.
-   * @param \Drupal\Core\TypedData\TypedDataInterface $parent
-   *   (optional) The parent object of the data property, or NULL if it is the
-   *   root of a typed data tree. Defaults to NULL.
-   */
-  public function setContext($name = NULL, TypedDataInterface $parent = NULL);
 }
diff --git a/core/lib/Drupal/Core/TypedData/TypedDataManager.php b/core/lib/Drupal/Core/TypedData/TypedDataManager.php
index f0e8034..7721b69 100644
--- a/core/lib/Drupal/Core/TypedData/TypedDataManager.php
+++ b/core/lib/Drupal/Core/TypedData/TypedDataManager.php
@@ -14,6 +14,7 @@
 use Drupal\Core\Plugin\DefaultPluginManager;
 use InvalidArgumentException;
 use Drupal\Core\TypedData\Validation\MetadataFactory;
+use Drupal\Core\TypedData\ContextAwareInterface;
 use Drupal\Core\Validation\ConstraintManager;
 use Drupal\Core\Validation\DrupalTranslator;
 use Symfony\Component\Validator\ValidatorInterface;
@@ -198,7 +199,7 @@ public function getInstance(array $options) {
    * property path, i.e. all property instances having the same property path
    * and inheriting from the same data type are prototyped.
    *
-   * @param \Drupal\Core\TypedData\TypedDataInterface $object
+   * @param \Drupal\Core\TypedData\ContextAwareInterface $object
    *   The parent typed data object, implementing the TypedDataInterface and
    *   either the ListInterface or the ComplexDataInterface.
    * @param string $property_name
@@ -219,9 +220,11 @@ public function getInstance(array $options) {
    * @todo: Add type-hinting to $object once entities implement the
    *   TypedDataInterface.
    */
-  public function getPropertyInstance($object, $property_name, $value = NULL) {
+  public function getPropertyInstance(ContextAwareInterface $object, $property_name, $value = NULL) {
     if ($root = $object->getRoot()) {
-      $key = $root->getType() . ':' . $object->getPropertyPath() . '.';
+      // @todo: Remove conditional check when #1868004 lands.
+      $id = $root instanceof \Drupal\Core\Entity\EntityInterface ? 'entity' : $root->getPluginId();
+      $key = $id . ':' . $object->getPropertyPath() . '.';
       // If we are creating list items, we always use 0 in the key as all list
       // items look the same.
       $key .= is_numeric($property_name) ? 0 : $property_name;
diff --git a/core/lib/Drupal/Core/TypedData/ValidatableInterface.php b/core/lib/Drupal/Core/TypedData/ValidatableInterface.php
new file mode 100644
index 0000000..ac0af19
--- /dev/null
+++ b/core/lib/Drupal/Core/TypedData/ValidatableInterface.php
@@ -0,0 +1,33 @@
+<?php
+
+/**
+ * @file
+ * Contains \Drupal\Core\TypedData\ValidatableInterface.
+ */
+
+namespace Drupal\Core\TypedData;
+
+/**
+ * Interface for checking access.
+ */
+interface ValidatableInterface {
+
+  /**
+   * Gets a list of validation constraints.
+   *
+   * @return array
+   *   Array of constraints, each being an instance of
+   *   \Symfony\Component\Validator\Constraint.
+   */
+  public function getConstraints();
+
+  /**
+   * Validates the currently set data value.
+   *
+   * @return \Symfony\Component\Validator\ConstraintViolationListInterface
+   *   A list of constraint violations. If the list is empty, validation
+   *   succeeded.
+   */
+  public function validate();
+
+}
diff --git a/core/modules/action/lib/Drupal/action/ActionFormControllerBase.php b/core/modules/action/lib/Drupal/action/ActionFormControllerBase.php
index ff48164..19b1e82 100644
--- a/core/modules/action/lib/Drupal/action/ActionFormControllerBase.php
+++ b/core/modules/action/lib/Drupal/action/ActionFormControllerBase.php
@@ -94,7 +94,7 @@ public function form(array $form, array &$form_state) {
     );
     $form['type'] = array(
       '#type' => 'value',
-      '#value' => $this->entity->getType(),
+      '#value' => 'entity',
     );
 
     if ($this->plugin instanceof ConfigurableActionInterface) {
diff --git a/core/modules/action/lib/Drupal/action/ActionListController.php b/core/modules/action/lib/Drupal/action/ActionListController.php
index f3d5848..36f086f 100644
--- a/core/modules/action/lib/Drupal/action/ActionListController.php
+++ b/core/modules/action/lib/Drupal/action/ActionListController.php
@@ -85,7 +85,7 @@ public function load() {
    * {@inheritdoc}
    */
   public function buildRow(EntityInterface $entity) {
-    $row['type'] = $entity->getType();
+    $row['type'] = 'entity';
     $row['label'] = String::checkPlain($entity->label());
     if ($this->hasConfigurableActions) {
       $row['operations']['data'] = $this->buildOperations($entity);
diff --git a/core/modules/config/lib/Drupal/config/Tests/ConfigSchemaTest.php b/core/modules/config/lib/Drupal/config/Tests/ConfigSchemaTest.php
index d3bceb8..4616efe 100644
--- a/core/modules/config/lib/Drupal/config/Tests/ConfigSchemaTest.php
+++ b/core/modules/config/lib/Drupal/config/Tests/ConfigSchemaTest.php
@@ -162,13 +162,11 @@ function testSchemaData() {
     // Try some simple properties.
     $meta = config_typed()->get('system.site');
     $property = $meta->get('name');
-    $this->assertTrue(is_a($property, 'Drupal\Core\TypedData\Plugin\DataType\String'), 'Got the right wrapper fo the site name property.');
-    $this->assertEqual($property->getType(), 'label', 'Got the right string type for site name data.');
+    $this->assertTrue($property instanceof \Drupal\Core\TypedData\Plugin\DataType\String, 'Got the right wrapper fo the site name property.');
     $this->assertEqual($property->getValue(), 'Drupal', 'Got the right string value for site name data.');
 
     $property = $meta->get('page')->get('front');
-    $this->assertTrue(is_a($property, 'Drupal\Core\TypedData\Plugin\DataType\String'), 'Got the right wrapper fo the page.front property.');
-    $this->assertEqual($property->getType(), 'path', 'Got the right type for page.front data (undefined).');
+    $this->assertTrue($property instanceof \Drupal\Core\TypedData\Plugin\DataType\String, 'Got the right wrapper fo the page.front property.');
     $this->assertEqual($property->getValue(), 'user', 'Got the right value for page.front data.');
 
     // Check nested array of properties.
@@ -192,7 +190,7 @@ function testSchemaData() {
     $ieid = key($effects->getValue());
     $effect = $effects[$ieid];
     $this->assertTrue(count($effect['data']) && $effect['name']->getValue() == 'image_scale', 'Got data for the image scale effect from metadata.');
-    $this->assertEqual($effect['data']['width']->getType(), 'integer', 'Got the right type for the scale effect width.');
+    $this->assertTrue($effect['data']['width'] instanceof \Drupal\Core\TypedData\Plugin\DataType\Integer, 'Got the right type for the scale effect width.');
     $this->assertEqual($effect['data']['width']->getValue(), 480, 'Got the right value for the scale effect width.' );
 
     // Finally update some object using a configuration wrapper.
diff --git a/core/modules/system/lib/Drupal/system/Tests/Entity/EntityFieldTest.php b/core/modules/system/lib/Drupal/system/Tests/Entity/EntityFieldTest.php
index e8878be..22de621 100644
--- a/core/modules/system/lib/Drupal/system/Tests/Entity/EntityFieldTest.php
+++ b/core/modules/system/lib/Drupal/system/Tests/Entity/EntityFieldTest.php
@@ -505,9 +505,9 @@ protected function assertDataStructureInterfaces($entity_type) {
    * Recursive helper for getting all contained strings,
    * i.e. properties of type string.
    */
-  public function getContainedStrings(TypedDataInterface $wrapper, $depth, array &$strings) {
+  public function getContainedStrings($wrapper, $depth, array &$strings) {
 
-    if ($wrapper->getType() == 'string') {
+    if ($wrapper instanceof \Drupal\Core\TypedData\Type\StringInterface) {
       $strings[] = $wrapper->getValue();
     }
 
diff --git a/core/modules/system/lib/Drupal/system/Tests/TypedData/TypedDataTest.php b/core/modules/system/lib/Drupal/system/Tests/TypedData/TypedDataTest.php
index 3558d20..64b152e 100644
--- a/core/modules/system/lib/Drupal/system/Tests/TypedData/TypedDataTest.php
+++ b/core/modules/system/lib/Drupal/system/Tests/TypedData/TypedDataTest.php
@@ -61,7 +61,7 @@ protected function createTypedData($definition, $value = NULL, $name = NULL) {
     $definition = $data->getDefinition();
     $this->assertTrue(!empty($definition['type']), format_string('!type data definition was returned.', array('!type' => $definition['type'])));
     // Assert that the correct type was constructed.
-    $this->assertEqual($data->getType(), $type, format_string('!type object returned type.', array('!type' => $definition['type'])));
+    $this->assertEqual($data->getPluginId(), $type, format_string('!type object returned type.', array('!type' => $definition['type'])));
     return $data;
   }
 
@@ -413,7 +413,7 @@ public function testTypedDataMaps() {
     // Test iterating.
     $count = 0;
     foreach ($typed_data as $item) {
-      $this->assertTrue($item instanceof \Drupal\Core\TypedData\TypedDataInterface);
+      $this->assertTrue($item instanceof \Drupal\Core\TypedData\Plugin\DataType\Any);
       $count++;
     }
     $this->assertEqual($count, 3);
@@ -505,6 +505,9 @@ public function testTypedDataValidation() {
         'Range' => array('min' => 5),
       ),
     );
+    $integer = $this->typedData->create($definition, 7);
+    $this->assertTrue($integer instanceof \Drupal\Core\TypedData\ValidatableInterface);
+
     $violations = $this->typedData->create($definition, 10)->validate();
     $this->assertEqual($violations->count(), 0);
 
@@ -614,4 +617,46 @@ public function testTypedDataValidation() {
     $this->assertEqual($violations[0]->getInvalidValue(), 'string');
     $this->assertIdentical($violations[0]->getPropertyPath(), '0.value');
   }
+
+  /**
+   * Tests typed data contexts.
+   */
+  function testTypedDataContext() {
+    // Test working with a simple map.
+    $value = array(
+      'one' => 'ett',
+      'two' => 'två',
+      'three' => 'tre',
+    );
+    $typed_data = $this->createTypedData(array(
+      'type' => 'map',
+    ), $value);
+
+    $this->assertTrue($typed_data instanceof \Drupal\Core\TypedData\ContextAwareInterface);
+
+    $item = $typed_data->get('one');
+    $this->assertEqual($item->getName(), 'one');
+    $this->assertEqual($item->getPropertyPath(), 'one');
+    $this->assertTrue($item->getParent() instanceof \Drupal\Core\TypedData\Plugin\DataType\Map);
+    $this->assertTrue($item->getRoot() instanceof \Drupal\Core\TypedData\Plugin\DataType\Map);
+  }
+
+  /**
+   * Tests the typed data manager.
+   */
+  function testTypedDataManager() {
+    // Test working with a simple map.
+    $value = array(
+      'one' => 'första',
+      'two' => 'andra',
+      'three' => 'tredje',
+    );
+    $typed_data = $this->createTypedData(array(
+      'type' => 'map',
+    ), $value);
+
+    $item = $this->typedData->getPropertyInstance($typed_data, 'two', 'prototyped value');
+    $this->assertTrue($item instanceof \Drupal\Core\TypedData\Plugin\DataType\Any);
+    $this->assertEqual($item->getValue(), 'prototyped value');
+  }
 }
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 80c93b3..9d8ef70 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
@@ -100,7 +100,7 @@ public function prepareCache() {
       $itemBC = $this->getValue();
       $langcode = $this->getParent()->getParent()->language()->id;
       $this->set('safe_value', text_sanitize($this->getInstance()->settings['text_processing'], $langcode, $itemBC, 'value'));
-      if ($this->getType() == 'field_item:text_with_summary') {
+      if ($this instanceof TextWithSummaryItem) {
         $this->set('safe_summary', text_sanitize($this->getInstance()->settings['text_processing'], $langcode, $itemBC, 'summary'));
       }
     }
diff --git a/core/modules/views_ui/lib/Drupal/views_ui/ViewUI.php b/core/modules/views_ui/lib/Drupal/views_ui/ViewUI.php
index 92fa27b..01e8d58 100644
--- a/core/modules/views_ui/lib/Drupal/views_ui/ViewUI.php
+++ b/core/modules/views_ui/lib/Drupal/views_ui/ViewUI.php
@@ -1081,13 +1081,6 @@ public function initTranslation($langcode) {
   }
 
   /**
-   * Implements \Drupal\Core\TypedData\TypedDataInterface::getType().
-   */
-  public function getType() {
-    return $this->storage->getType();
-  }
-
-  /**
    * Implements \Drupal\Core\TypedData\TypedDataInterface::getDefinition().
    */
   public function getDefinition() {
@@ -1095,77 +1088,42 @@ public function getDefinition() {
   }
 
   /**
-   * Implements \Drupal\Core\TypedData\TypedDataInterface::getValue().
-   */
-  public function getValue() {
-    return $this->storage->getValue();
-  }
-
-  /**
-   * Implements \Drupal\Core\TypedData\TypedDataInterface::setValue().
-   */
-  public function setValue($value, $notify = TRUE) {
-    return $this->storage->setValue($value, $notify);
-  }
-
-  /**
-   * Implements \Drupal\Core\TypedData\TypedDataInterface::getString().
-   */
-  public function getString() {
-    return $this->storage->getString();
-  }
-
-  /**
-   * Implements \Drupal\Core\TypedData\TypedDataInterface::getConstraints().
-   */
-  public function getConstraints() {
-    return $this->storage->getConstraints();
-  }
-
-  /**
-   * Implements \Drupal\Core\TypedData\TypedDataInterface::validate().
-   */
-  public function validate() {
-    return $this->storage->validate();
-  }
-
-  /**
-   * Implements \Drupal\Core\TypedData\TypedDataInterface::getName().
+   * {@inheritdoc}
    */
   public function getName() {
     return $this->storage->getName();
   }
 
   /**
-   * Implements \Drupal\Core\TypedData\TypedDataInterface::getRoot().
+   * {@inheritdoc}
    */
   public function getRoot() {
     return $this->storage->getRoot();
   }
 
   /**
-   * Implements \Drupal\Core\TypedData\TypedDataInterface::getPropertyPath().
+   * {@inheritdoc}
    */
   public function getPropertyPath() {
     return $this->storage->getPropertyPath();
   }
 
   /**
-   * Implements \Drupal\Core\TypedData\TypedDataInterface::getParent().
+   * {@inheritdoc}
    */
   public function getParent() {
     return $this->storage->getParent();
   }
 
   /**
-   * Implements \Drupal\Core\TypedData\TypedDataInterface::setContext().
+   * {@inheritdoc}
    */
   public function setContext($name = NULL, TypedDataInterface $parent = NULL) {
     return $this->storage->setContext($name, $parent);
   }
 
   /**
-   * Implements \Drupal\Core\TypedData\TypedDataInterface::onChange().
+   * {@inheritdoc}
    */
   public function onChange($property_name) {
     $this->storage->onChange($property_name);