diff --git a/core/core.link_relation.yml b/core/core.link_relation.yml
index cccf9e5..2181573 100644
--- a/core/core.link_relation.yml
+++ b/core/core.link_relation.yml
@@ -1,3 +1,15 @@
+# This are Drupal specific link relations.
+add-form:
+  relationship: https://drupal.org/link-relations/add-form
+  description: A form where a resource of this type can be created
+edit-form:
+  relationship: https://drupal.org/link-relations/edit-form
+  description: A form where a resource of this type can be created
+create:
+  relationship: https://drupal.org/link-relations/create
+  description: A REST resource URL where a resource of this type can be created
+
+# These are the one from IANA itself.
 about:
   description: 'Refers to a resource that is the subject of the link''s context.'
   reference: '[RFC6903], section 2'
diff --git a/core/lib/Drupal/Core/Http/LinkRelation.php b/core/lib/Drupal/Core/Http/LinkRelation.php
index 6fa2622..39a937b 100644
--- a/core/lib/Drupal/Core/Http/LinkRelation.php
+++ b/core/lib/Drupal/Core/Http/LinkRelation.php
@@ -23,8 +23,14 @@ public function getName() {
   /**
    * {@inheritdoc}
    */
+  public function getRelationshipUrl() {
+    return isset($this->pluginDefinition['relationship']) ? $this->pluginDefinition['relationship'] : '';
+  }
+
+  /**
+   * {@inheritdoc}
+   */
   public function getDescription() {
-    return isset($this->pluginDefinition['description']) ? $this->pluginDefinition['description'] : '';
   }
 
   /**
diff --git a/core/lib/Drupal/Core/Http/LinkRelationInterface.php b/core/lib/Drupal/Core/Http/LinkRelationInterface.php
index 62dc923..a6f8738 100644
--- a/core/lib/Drupal/Core/Http/LinkRelationInterface.php
+++ b/core/lib/Drupal/Core/Http/LinkRelationInterface.php
@@ -17,6 +17,13 @@
   public function getName();
 
   /**
+   * If the relationship is not a IANA one, provide the URL to the definition.
+   *
+   * @return string
+   */
+  public function getRelationshipUrl();
+
+  /**
    * Returns the link relation description.
    *
    * @return string
diff --git a/core/modules/rest/src/Plugin/rest/resource/EntityResource.php b/core/modules/rest/src/Plugin/rest/resource/EntityResource.php
index a41354f..f678386 100644
--- a/core/modules/rest/src/Plugin/rest/resource/EntityResource.php
+++ b/core/modules/rest/src/Plugin/rest/resource/EntityResource.php
@@ -376,7 +376,12 @@ protected function addLinkHeaders(EntityInterface $entity, CacheableResponseInte
           ->toString(TRUE);
         $response->addCacheableDependency($generator_url);
         $uri = $generator_url->getGeneratedUrl();
-        $link_header = '<' . $uri . '>; rel="' . $relation_name . '"';
+        $relationship = $relation_name;
+        if (!empty($definition['relationship'])) {
+          $relationship = $definition['relationship'];
+        }
+
+        $link_header = '<' . $uri . '>; rel="' . $relationship . '"';
         $response->headers->set('Link', $link_header, FALSE);
       }
     }
diff --git a/core/modules/rest/src/Tests/NodeTest.php b/core/modules/rest/src/Tests/NodeTest.php
index bf0d89b..0e411dc 100644
--- a/core/modules/rest/src/Tests/NodeTest.php
+++ b/core/modules/rest/src/Tests/NodeTest.php
@@ -83,7 +83,7 @@ public function testNodes() {
     $this->httpRequest($node->urlInfo()->setRouteParameter('_format', $this->defaultFormat), 'GET');
     $this->assertResponse(200);
     $this->assertHeader('Content-type', $this->defaultMimeType);
-    $this->assertLinkHeader($node, ['canonical', 'edit-form', 'version-history']);
+    $this->assertLinkHeader($node, ['edit-form' => 'https://drupal.org/link-relations/edit-form', 'canonical' => 'canonical', 'version-history' => 'version-history']);
 
     // Also check that JSON works and the routing system selects the correct
     // REST route.
@@ -91,7 +91,7 @@ public function testNodes() {
     $this->httpRequest($node->urlInfo()->setRouteParameter('_format', 'json'), 'GET');
     $this->assertResponse(200);
     $this->assertHeader('Content-type', 'application/json');
-    $this->assertLinkHeader($node, ['canonical', 'edit-form', 'version-history']);
+    $this->assertLinkHeader($node, ['edit-form' => 'https://drupal.org/link-relations/edit-form', 'canonical' => 'canonical', 'version-history' => 'version-history']);
 
     // Check that a simple PATCH update to the node title works as expected.
     $this->enableNodeConfiguration('PATCH', 'update');
diff --git a/core/modules/rest/src/Tests/RESTTestBase.php b/core/modules/rest/src/Tests/RESTTestBase.php
index 080c5a4..c03d4d9 100644
--- a/core/modules/rest/src/Tests/RESTTestBase.php
+++ b/core/modules/rest/src/Tests/RESTTestBase.php
@@ -544,13 +544,13 @@ protected function assertLinkHeader($entity, array $link_relationships = [
   ]) {
     // Add expected Link Headers.
     $link_headers = [];
-    foreach ($link_relationships as $link) {
-      if ($entity->hasLinkTemplate($link)) {
-        $canonical_url = $entity->toUrl($link)
+    foreach ($link_relationships as $relation_name => $relationship) {
+      if ($entity->hasLinkTemplate($relation_name)) {
+        $canonical_url = $entity->toUrl($relation_name)
           ->setAbsolute(TRUE)
           ->toString(TRUE)
           ->getGeneratedUrl();
-        $link_headers[] = '<' . $canonical_url . '>; rel="' . $link . '"';
+        $link_headers[] = '<' . $canonical_url . '>; rel="' . $relationship . '"';
       }
     }
     return $this->assertHeader('Link', implode(',', $link_headers));