diff --git a/core/lib/Drupal/Core/Field/Plugin/Field/FieldFormatter/NumericFormatterBase.php b/core/lib/Drupal/Core/Field/Plugin/Field/FieldFormatter/NumericFormatterBase.php
index dc0fe82..27bb234 100644
--- a/core/lib/Drupal/Core/Field/Plugin/Field/FieldFormatter/NumericFormatterBase.php
+++ b/core/lib/Drupal/Core/Field/Plugin/Field/FieldFormatter/NumericFormatterBase.php
@@ -78,6 +78,11 @@ public function viewElements(FieldItemListInterface $items) {
         $suffix = (count($suffixes) > 1) ? format_plural($item->value, $suffixes[0], $suffixes[1]) : $suffixes[0];
         $output = $prefix . $output . $suffix;
       }
+      if ($item->value != $output) {
+        if (!empty($item->_attributes)) {
+          $item->_attributes += array('content' => $item->value);
+        }
+      }
 
       $elements[$delta] = array('#markup' => $output);
     }
diff --git a/core/modules/rdf/src/Tests/Field/FieldRdfaTestBase.php b/core/modules/rdf/src/Tests/Field/FieldRdfaTestBase.php
index 9a26aca..c0bd8b9 100644
--- a/core/modules/rdf/src/Tests/Field/FieldRdfaTestBase.php
+++ b/core/modules/rdf/src/Tests/Field/FieldRdfaTestBase.php
@@ -91,6 +91,7 @@ protected function assertFormatterRdfa($formatter, $property, $expected_rdf_valu
     $build = entity_view($this->entity, 'default');
     $output = drupal_render($build);
     $graph = new \EasyRdf_Graph($this->uri, $output, 'rdfa');
+    $this->setRawContent($output);
 
     // If verbose debugging is turned on, display the HTML and parsed RDF
     // in the results.
@@ -105,7 +106,7 @@ protected function assertFormatterRdfa($formatter, $property, $expected_rdf_valu
   /**
    * Creates the field for testing.
    */
-  protected function createTestField() {
+  protected function createTestField($field_settings = array()) {
     entity_create('field_storage_config', array(
       'name' => $this->fieldName,
       'entity_type' => 'entity_test',
@@ -115,6 +116,7 @@ protected function createTestField() {
       'entity_type' => 'entity_test',
       'field_name' => $this->fieldName,
       'bundle' => 'entity_test',
+      'settings' => $field_settings,
     ))->save();
   }
 
@@ -131,4 +133,52 @@ protected function getAbsoluteUri($entity) {
     return $entity->url('canonical', array('absolute' => TRUE));
   }
 
+  /**
+   * Parse a content and return the html element.
+   *
+   * @param string $content
+   *   The html to parse.
+   *
+   * @return array
+   *   An array containing simplexml objects.
+   */
+  protected function parseContent($content) {
+    $htmlDom = new \DOMDocument();
+    @$htmlDom->loadHTML('<?xml encoding="UTF-8">' . $content);
+    $elements = simplexml_import_dom($htmlDom);
+
+    return $elements;
+  }
+
+  /**
+   * Performs an xpath search on a certain content.
+   *
+   * The search is relative to the root element of the $content variable.
+   *
+   * @param string $content
+   *   The html to parse.
+   * @param string $xpath
+   *   The xpath string to use in the search.
+   * @param array $arguments
+   *   Some arguments for the xpath.
+   *
+   * @return array|FALSE
+   *   The return value of the xpath search. For details on the xpath string
+   *   format and return values see the SimpleXML documentation,
+   *   http://php.net/manual/function.simplexml-element-xpath.php.
+   */
+  protected function xpathContent($content, $xpath, array $arguments = array()) {
+    if ($elements = $this->parseContent($content)) {
+      $xpath = $this->buildXPathQuery($xpath, $arguments);
+      $result = $elements->xpath($xpath);
+      // Some combinations of PHP / libxml versions return an empty array
+      // instead of the documented FALSE. Forcefully convert any falsish values
+      // to an empty array to allow foreach(...) constructions.
+      return $result ? $result : array();
+    }
+    else {
+      return FALSE;
+    }
+  }
+
 }
diff --git a/core/modules/rdf/src/Tests/Field/NumberFieldRdfaTest.php b/core/modules/rdf/src/Tests/Field/NumberFieldRdfaTest.php
new file mode 100644
index 0000000..8943af0
--- /dev/null
+++ b/core/modules/rdf/src/Tests/Field/NumberFieldRdfaTest.php
@@ -0,0 +1,181 @@
+<?php
+/**
+ * @file
+ * Contains \Drupal\rdf\Tests\Field\NumberFieldRdfaTest.
+ */
+
+namespace Drupal\rdf\Tests\Field;
+
+use Drupal\rdf\Tests\Field\FieldRdfaTestBase;
+
+/**
+ * Tests RDFa output by number field formatters.
+ *
+ * @group rdf
+ */
+class NumberFieldRdfaTest extends FieldRdfaTestBase {
+
+  /**
+   * The 'value' property value for testing.
+   *
+   * @var string
+   */
+  protected $testValue = 'test_text_value';
+
+  /**
+   * Tests the integer formatter.
+   */
+  public function testIntegerFormatter() {
+    $this->fieldType = 'integer';
+    $this->testValue = 3;
+    $this->createTestField();
+    $this->createTestEntity();
+    $this->assertFormatterRdfa(array('type' => $this->fieldType), 'http://schema.org/baseSalary', array('value' => $this->testValue));
+
+    // Test that the content attribute is not created.
+    $result = $this->xpathContent($this->getRawContent(), '//div[contains(@class, "field-item") and @content=:testValue]', array(':testValue' => $this->testValue));
+    $this->assertFalse($result);
+  }
+
+  /**
+   * Tests the integer formatter with settings.
+   */
+  public function testIntegerFormatterWithSettings() {
+    $this->fieldType = 'integer';
+    $formatter = array(
+      'type' => $this->fieldType,
+      'settings' => array(
+        'thousand_separator' => '.',
+        'prefix_suffix' => TRUE,
+      ),
+    );
+    $this->testValue = 3333333.33;
+    $field_instance_settings = array(
+      'prefix' => '#',
+      'suffix' => ' llamas.',
+    );
+    $this->createTestField($field_instance_settings);
+    $this->createTestEntity();
+    $this->assertFormatterRdfa($formatter, 'http://schema.org/baseSalary', array('value' => $this->testValue));
+
+    // Test that the content attribute is not created.
+    $result = $this->xpathContent($this->getRawContent(), '//div[contains(@class, "field-item") and @content=:testValue]', array(':testValue' => $this->testValue));
+    $this->assertTrue($result);
+  }
+
+  /**
+   * Tests the float formatter.
+   */
+  public function testFloatFormatter() {
+    $this->fieldType = 'float';
+    $this->testValue = 3.33;
+    $this->createTestField();
+    $this->createTestEntity();
+    $this->assertFormatterRdfa(array('type' => $this->fieldType), 'http://schema.org/baseSalary', array('value' => $this->testValue));
+
+    // Test that the content attribute is not created.
+    $result = $this->xpathContent($this->getRawContent(), '//div[contains(@class, "field-item") and @content=:testValue]', array(':testValue' => $this->testValue));
+    $this->assertFalse($result);
+  }
+
+  /**
+   * Tests the float formatter with settings.
+   */
+  public function testFloatFormatterWithSettings() {
+    $this->fieldType = 'float';
+    $formatter = array(
+      'type' => $this->fieldType,
+      'settings' => array(
+        'thousand_separator' => '.',
+        'decimal_separator' => ',',
+        'prefix_suffix' => TRUE,
+      ),
+    );
+    $this->testValue = 3333333.33;
+    $field_instance_settings = array(
+      'prefix' => '$',
+      'suffix' => ' more.',
+    );
+    $this->createTestField($field_instance_settings);
+    $this->createTestEntity();
+    $this->assertFormatterRdfa($formatter, 'http://schema.org/baseSalary', array('value' => $this->testValue));
+
+    // Test that the content attribute is not created.
+    $result = $this->xpathContent($this->getRawContent(), '//div[contains(@class, "field-item") and @content=:testValue]', array(':testValue' => $this->testValue));
+    $this->assertTrue($result);
+  }
+
+  /**
+   * Tests the float formatter with a scale.
+   */
+  public function testFloatFormatterWithScale() {
+    $this->fieldType = 'float';
+    $formatter = array(
+      'type' => $this->fieldType,
+      'settings' => array(
+        'scale' => 5,
+      ),
+    );
+    $this->testValue = 3.33;
+    $this->createTestField();
+    $this->createTestEntity();
+    $this->assertFormatterRdfa($formatter, 'http://schema.org/baseSalary', array('value' => $this->testValue));
+  }
+
+  /**
+   * Tests the decimal formatter.
+   */
+  public function testDecimalFormatter() {
+    $this->fieldType = 'decimal';
+    $this->testValue = 3.33;
+    $this->createTestField();
+    $this->createTestEntity();
+    $this->assertFormatterRdfa(array('type' => $this->fieldType), 'http://schema.org/baseSalary', array('value' => $this->testValue));
+
+    // Test that the content attribute is not created.
+    $result = $this->xpathContent($this->getRawContent(), '//div[contains(@class, "field-item") and @content=:testValue]', array(':testValue' => $this->testValue));
+    $this->assertFalse($result);
+  }
+
+  /**
+   * Tests the decimal formatter with settings.
+   */
+  public function testDecimalFormatterWithSettings() {
+    $this->fieldType = 'decimal';
+    $formatter = array(
+      'type' => $this->fieldType,
+      'settings' => array(
+        'thousand_separator' => 't',
+        'decimal_separator' => '#',
+        'prefix_suffix' => TRUE,
+      ),
+    );
+    $this->testValue = 3333333.33;
+    $field_instance_settings = array(
+      'prefix' => '$',
+      'suffix' => ' more.',
+    );
+    $this->createTestField($field_instance_settings);
+    $this->createTestEntity();
+    $this->assertFormatterRdfa($formatter, 'http://schema.org/baseSalary', array('value' => $this->testValue));
+
+    // Test that the content attribute is not created.
+    $result = $this->xpathContent($this->getRawContent(), '//div[contains(@class, "field-item") and @content=:testValue]', array(':testValue' => $this->testValue));
+    $this->assertTrue($result);
+  }
+
+  /**
+   * Creates the RDF mapping for the field.
+   */
+  protected function createTestEntity() {
+    // Add the mapping.
+    $mapping = rdf_get_mapping('entity_test', 'entity_test');
+    $mapping->setFieldMapping($this->fieldName, array(
+      'properties' => array('schema:baseSalary'),
+    ))->save();
+
+    // Set up test entity.
+    $this->entity = entity_create('entity_test', array());
+    $this->entity->{$this->fieldName}->value = $this->testValue;
+  }
+}