diff --git a/core/modules/entity_reference/src/Plugin/Field/FieldFormatter/EntityReferenceEntityFormatter.php b/core/modules/entity_reference/src/Plugin/Field/FieldFormatter/EntityReferenceEntityFormatter.php
index 4065ea2..15f1df1 100644
--- a/core/modules/entity_reference/src/Plugin/Field/FieldFormatter/EntityReferenceEntityFormatter.php
+++ b/core/modules/entity_reference/src/Plugin/Field/FieldFormatter/EntityReferenceEntityFormatter.php
@@ -115,6 +115,12 @@ public function viewElements(FieldItemListInterface $items) {
           // Hide the element links.
           $elements[$delta][$target_type][$item->target_id]['links']['#access'] = FALSE;
         }
+        // Add a resource attribute to set the mapping property's value to the
+        // entity's url. Since we don't know what the markup of the entity will
+        // be, we shouldn't rely on it for structured data such as RDFa.
+        if (!empty($item->_attributes)) {
+          $item->_attributes += array('resource' => $item->entity->url());
+        }
       }
       else {
         // This is an "auto_create" item.
diff --git a/core/modules/entity_reference/src/Plugin/Field/FieldFormatter/EntityReferenceLabelFormatter.php b/core/modules/entity_reference/src/Plugin/Field/FieldFormatter/EntityReferenceLabelFormatter.php
index 992da6a..7da2e76 100644
--- a/core/modules/entity_reference/src/Plugin/Field/FieldFormatter/EntityReferenceLabelFormatter.php
+++ b/core/modules/entity_reference/src/Plugin/Field/FieldFormatter/EntityReferenceLabelFormatter.php
@@ -76,6 +76,14 @@ public function viewElements(FieldItemListInterface $items) {
             '#type' => 'link',
             '#title' => $label,
           ) + $uri->toRenderArray();
+
+          if (!empty($item->_attributes)) {
+            $elements[$delta]['#options'] += array('attributes' => array());
+            $elements[$delta]['#options']['attributes'] += $item->_attributes;
+            // Unset field item attributes since they have been included in the
+            // formatter output and should not be rendered in the field template.
+            unset($item->_attributes);
+          }
         }
         else {
           $elements[$delta] = array('#markup' => String::checkPlain($label));
diff --git a/core/modules/rdf/src/Tests/Field/FieldRdfaTestBase.php b/core/modules/rdf/src/Tests/Field/FieldRdfaTestBase.php
index 14bcfa1..f34a05b 100644
--- a/core/modules/rdf/src/Tests/Field/FieldRdfaTestBase.php
+++ b/core/modules/rdf/src/Tests/Field/FieldRdfaTestBase.php
@@ -115,5 +115,8 @@ protected function createTestField() {
   protected function getAbsoluteUri($entity) {
     return $entity->url('canonical', array('absolute' => TRUE));
   }
+  protected function getRelativeUri($entity) {
+    return $entity->url('canonical', array('absolute' => FALSE));
+  }
 
 }