diff --git a/resources/sql/patches/migrate-differential-dependencies.php b/resources/sql/patches/migrate-differential-dependencies.php
--- a/resources/sql/patches/migrate-differential-dependencies.php
+++ b/resources/sql/patches/migrate-differential-dependencies.php
@@ -18,7 +18,7 @@
   foreach ($deps as $dep) {
     $editor->addEdge(
       $rev->getPHID(),
-      PhabricatorEdgeConfig::TYPE_DREV_DEPENDS_ON_DREV,
+      DifferentialRevisionDependsOnRevisionEdgeType::EDGECONST,
       $dep);
   }
   $editor->save();
diff --git a/src/__phutil_library_map__.php b/src/__phutil_library_map__.php
--- a/src/__phutil_library_map__.php
+++ b/src/__phutil_library_map__.php
@@ -406,6 +406,8 @@
     'DifferentialRevision' => 'applications/differential/storage/DifferentialRevision.php',
     'DifferentialRevisionCloseDetailsController' => 'applications/differential/controller/DifferentialRevisionCloseDetailsController.php',
     'DifferentialRevisionControlSystem' => 'applications/differential/constants/DifferentialRevisionControlSystem.php',
+    'DifferentialRevisionDependedOnByRevisionEdgeType' => 'applications/differential/edge/DifferentialRevisionDependedOnByRevisionEdgeType.php',
+    'DifferentialRevisionDependsOnRevisionEdgeType' => 'applications/differential/edge/DifferentialRevisionDependsOnRevisionEdgeType.php',
     'DifferentialRevisionDetailView' => 'applications/differential/view/DifferentialRevisionDetailView.php',
     'DifferentialRevisionEditController' => 'applications/differential/controller/DifferentialRevisionEditController.php',
     'DifferentialRevisionHasTaskEdgeType' => 'applications/differential/edge/DifferentialRevisionHasTaskEdgeType.php',
@@ -3455,6 +3457,8 @@
       'PhabricatorProjectInterface',
     ),
     'DifferentialRevisionCloseDetailsController' => 'DifferentialController',
+    'DifferentialRevisionDependedOnByRevisionEdgeType' => 'PhabricatorEdgeType',
+    'DifferentialRevisionDependsOnRevisionEdgeType' => 'PhabricatorEdgeType',
     'DifferentialRevisionDetailView' => 'AphrontView',
     'DifferentialRevisionEditController' => 'DifferentialController',
     'DifferentialRevisionHasTaskEdgeType' => 'PhabricatorEdgeType',
diff --git a/src/applications/differential/customfield/DifferentialDependenciesField.php b/src/applications/differential/customfield/DifferentialDependenciesField.php
--- a/src/applications/differential/customfield/DifferentialDependenciesField.php
+++ b/src/applications/differential/customfield/DifferentialDependenciesField.php
@@ -30,7 +30,7 @@
   public function getRequiredHandlePHIDsForPropertyView() {
     return PhabricatorEdgeQuery::loadDestinationPHIDs(
       $this->getObject()->getPHID(),
-      PhabricatorEdgeConfig::TYPE_DREV_DEPENDED_ON_BY_DREV);
+      DifferentialRevisionDependedOnByRevisionEdgeType::EDGECONST);
   }
 
   public function renderPropertyViewValue(array $handles) {
diff --git a/src/applications/differential/customfield/DifferentialDependsOnField.php b/src/applications/differential/customfield/DifferentialDependsOnField.php
--- a/src/applications/differential/customfield/DifferentialDependsOnField.php
+++ b/src/applications/differential/customfield/DifferentialDependsOnField.php
@@ -34,7 +34,7 @@
   public function getRequiredHandlePHIDsForPropertyView() {
     return PhabricatorEdgeQuery::loadDestinationPHIDs(
       $this->getObject()->getPHID(),
-      PhabricatorEdgeConfig::TYPE_DREV_DEPENDS_ON_DREV);
+      DifferentialRevisionDependsOnRevisionEdgeType::EDGECONST);
   }
 
   public function renderPropertyViewValue(array $handles) {
@@ -56,7 +56,7 @@
   public function getConduitDictionaryValue() {
     return PhabricatorEdgeQuery::loadDestinationPHIDs(
       $this->getObject()->getPHID(),
-      PhabricatorEdgeConfig::TYPE_DREV_DEPENDS_ON_DREV);
+      DifferentialRevisionDependsOnRevisionEdgeType::EDGECONST);
   }
 
 }
diff --git a/src/applications/differential/edge/DifferentialRevisionDependedOnByRevisionEdgeType.php b/src/applications/differential/edge/DifferentialRevisionDependedOnByRevisionEdgeType.php
new file mode 100644
--- /dev/null
+++ b/src/applications/differential/edge/DifferentialRevisionDependedOnByRevisionEdgeType.php
@@ -0,0 +1,107 @@
+<?php
+
+final class DifferentialRevisionDependedOnByRevisionEdgeType
+  extends PhabricatorEdgeType {
+
+  const EDGECONST = 6;
+
+  public function getInverseEdgeConstant() {
+    return DifferentialRevisionDependsOnRevisionEdgeType::EDGECONST;
+  }
+
+  public function shouldWriteInverseTransaction() {
+    return true;
+  }
+
+  public function shouldPreventCycles() {
+    return true;
+  }
+
+  public function getTransactionAddString(
+    $actor,
+    $add_count,
+    $add_edges) {
+
+    return pht(
+      '%s added %s dependencie(s): %s.',
+      $actor,
+      $add_count,
+      $add_edges);
+  }
+
+  public function getTransactionRemoveString(
+    $actor,
+    $rem_count,
+    $rem_edges) {
+
+    return pht(
+      '%s removed %s dependencie(s): %s.',
+      $actor,
+      $rem_count,
+      $rem_edges);
+  }
+
+  public function getTransactionEditString(
+    $actor,
+    $total_count,
+    $add_count,
+    $add_edges,
+    $rem_count,
+    $rem_edges) {
+
+    return pht(
+      '%s edited dependencie(s), added %s: %s; removed %s: %s.',
+      $actor,
+      $add_count,
+      $add_edges,
+      $rem_count,
+      $rem_edges);
+  }
+
+  public function getFeedAddString(
+    $actor,
+    $object,
+    $add_count,
+    $add_edges) {
+
+    return pht(
+      '%s added %s dependencie(s) for %s: %s.',
+      $actor,
+      $add_count,
+      $object,
+      $add_edges);
+  }
+
+  public function getFeedRemoveString(
+    $actor,
+    $object,
+    $rem_count,
+    $rem_edges) {
+
+    return pht(
+      '%s removed %s dependencie(s) for %s: %s.',
+      $actor,
+      $rem_count,
+      $object,
+      $rem_edges);
+  }
+
+  public function getFeedEditString(
+    $actor,
+    $object,
+    $total_count,
+    $add_count,
+    $add_edges,
+    $rem_count,
+    $rem_edges) {
+
+    return pht(
+      '%s edited dependencie(s) for %s, added %s: %s; removed %s: %s.',
+      $actor,
+      $object,
+      $add_count,
+      $add_edges,
+      $rem_count,
+      $rem_edges);
+  }
+}
diff --git a/src/applications/differential/edge/DifferentialRevisionDependsOnRevisionEdgeType.php b/src/applications/differential/edge/DifferentialRevisionDependsOnRevisionEdgeType.php
new file mode 100644
--- /dev/null
+++ b/src/applications/differential/edge/DifferentialRevisionDependsOnRevisionEdgeType.php
@@ -0,0 +1,107 @@
+<?php
+
+final class DifferentialRevisionDependsOnRevisionEdgeType
+  extends PhabricatorEdgeType {
+
+  const EDGECONST = 5;
+
+  public function getInverseEdgeConstant() {
+    return DifferentialRevisionDependedOnByRevisionEdgeType::EDGECONST;
+  }
+
+  public function shouldWriteInverseTransaction() {
+    return true;
+  }
+
+  public function shouldPreventCycles() {
+    return true;
+  }
+
+  public function getTransactionAddString(
+    $actor,
+    $add_count,
+    $add_edges) {
+
+    return pht(
+      '%s added %s dependencie(s): %s.',
+      $actor,
+      $add_count,
+      $add_edges);
+  }
+
+  public function getTransactionRemoveString(
+    $actor,
+    $rem_count,
+    $rem_edges) {
+
+    return pht(
+      '%s removed %s dependencie(s): %s.',
+      $actor,
+      $rem_count,
+      $rem_edges);
+  }
+
+  public function getTransactionEditString(
+    $actor,
+    $total_count,
+    $add_count,
+    $add_edges,
+    $rem_count,
+    $rem_edges) {
+
+    return pht(
+      '%s edited dependencie(s), added %s: %s; removed %s: %s.',
+      $actor,
+      $add_count,
+      $add_edges,
+      $rem_count,
+      $rem_edges);
+  }
+
+  public function getFeedAddString(
+    $actor,
+    $object,
+    $add_count,
+    $add_edges) {
+
+    return pht(
+      '%s added %s dependencie(s) for %s: %s.',
+      $actor,
+      $add_count,
+      $object,
+      $add_edges);
+  }
+
+  public function getFeedRemoveString(
+    $actor,
+    $object,
+    $rem_count,
+    $rem_edges) {
+
+    return pht(
+      '%s removed %s dependencie(s) for %s: %s.',
+      $actor,
+      $rem_count,
+      $object,
+      $rem_edges);
+  }
+
+  public function getFeedEditString(
+    $actor,
+    $object,
+    $total_count,
+    $add_count,
+    $add_edges,
+    $rem_count,
+    $rem_edges) {
+
+    return pht(
+      '%s edited dependencie(s) for %s, added %s: %s; removed %s: %s.',
+      $actor,
+      $object,
+      $add_count,
+      $add_edges,
+      $rem_count,
+      $rem_edges);
+  }
+}
diff --git a/src/applications/differential/editor/DifferentialTransactionEditor.php b/src/applications/differential/editor/DifferentialTransactionEditor.php
--- a/src/applications/differential/editor/DifferentialTransactionEditor.php
+++ b/src/applications/differential/editor/DifferentialTransactionEditor.php
@@ -1299,8 +1299,8 @@
       unset($rev_phids[$object->getPHID()]);
 
       if ($revs) {
-        $edge_depends = PhabricatorEdgeConfig::TYPE_DREV_DEPENDS_ON_DREV;
-        $edges[$edge_depends] = $rev_phids;
+        $depends = DifferentialRevisionDependsOnRevisionEdgeType::EDGECONST;
+        $edges[$depends] = $rev_phids;
       }
     }
 
diff --git a/src/applications/releeph/field/specification/ReleephDependsOnFieldSpecification.php b/src/applications/releeph/field/specification/ReleephDependsOnFieldSpecification.php
--- a/src/applications/releeph/field/specification/ReleephDependsOnFieldSpecification.php
+++ b/src/applications/releeph/field/specification/ReleephDependsOnFieldSpecification.php
@@ -28,6 +28,6 @@
 
     return PhabricatorEdgeQuery::loadDestinationPHIDs(
       $revision->getPHID(),
-      PhabricatorEdgeConfig::TYPE_DREV_DEPENDS_ON_DREV);
+      DifferentialRevisionDependsOnRevisionEdgeType::EDGECONST);
   }
 }
diff --git a/src/applications/search/controller/PhabricatorSearchAttachController.php b/src/applications/search/controller/PhabricatorSearchAttachController.php
--- a/src/applications/search/controller/PhabricatorSearchAttachController.php
+++ b/src/applications/search/controller/PhabricatorSearchAttachController.php
@@ -297,7 +297,7 @@
         $t_mock => PhabricatorEdgeConfig::TYPE_TASK_HAS_MOCK,
       ),
       $t_drev => array(
-        $t_drev => PhabricatorEdgeConfig::TYPE_DREV_DEPENDS_ON_DREV,
+        $t_drev => DifferentialRevisionDependsOnRevisionEdgeType::EDGECONST,
         $t_task => DifferentialRevisionHasTaskEdgeType::EDGECONST,
       ),
       $t_mock => array(
diff --git a/src/infrastructure/edges/constants/PhabricatorEdgeConfig.php b/src/infrastructure/edges/constants/PhabricatorEdgeConfig.php
--- a/src/infrastructure/edges/constants/PhabricatorEdgeConfig.php
+++ b/src/infrastructure/edges/constants/PhabricatorEdgeConfig.php
@@ -5,9 +5,6 @@
   const TABLE_NAME_EDGE       = 'edge';
   const TABLE_NAME_EDGEDATA   = 'edgedata';
 
-  const TYPE_DREV_DEPENDS_ON_DREV       = 5;
-  const TYPE_DREV_DEPENDED_ON_BY_DREV   = 6;
-
   const TYPE_PROJ_MEMBER                = 13;
   const TYPE_MEMBER_OF_PROJ             = 14;
 
@@ -112,9 +109,6 @@
 
   private static function getInverse($edge_type) {
     static $map = array(
-      self::TYPE_DREV_DEPENDS_ON_DREV => self::TYPE_DREV_DEPENDED_ON_BY_DREV,
-      self::TYPE_DREV_DEPENDED_ON_BY_DREV => self::TYPE_DREV_DEPENDS_ON_DREV,
-
       self::TYPE_PROJ_MEMBER => self::TYPE_MEMBER_OF_PROJ,
       self::TYPE_MEMBER_OF_PROJ => self::TYPE_PROJ_MEMBER,
 
@@ -163,8 +157,7 @@
 
   private static function shouldPreventCycles($edge_type) {
     static $map = array(
-      self::TYPE_TEST_NO_CYCLE          => true,
-      self::TYPE_DREV_DEPENDS_ON_DREV   => true,
+      self::TYPE_TEST_NO_CYCLE => true,
     );
     return isset($map[$edge_type]);
   }
@@ -200,8 +193,6 @@
         return '%s edited commit(s), added %d: %s; removed %d: %s.';
       case self::TYPE_MOCK_HAS_TASK:
         return '%s edited task(s), added %d: %s; removed %d: %s.';
-      case self::TYPE_DREV_DEPENDS_ON_DREV:
-      case self::TYPE_DREV_DEPENDED_ON_BY_DREV:
       case self::TYPE_COMMIT_HAS_DREV:
       case self::TYPE_REVIEWER_FOR_DREV:
         return '%s edited revision(s), added %d: %s; removed %d: %s.';
@@ -244,11 +235,8 @@
     switch ($type) {
       case self::TYPE_DREV_HAS_COMMIT:
         return '%s added %d commit(s): %s.';
-      case self::TYPE_DREV_DEPENDS_ON_DREV:
-        return '%s added %d dependencie(s): %s.';
       case self::TYPE_MOCK_HAS_TASK:
         return '%s added %d task(s): %s.';
-      case self::TYPE_DREV_DEPENDED_ON_BY_DREV:
       case self::TYPE_COMMIT_HAS_DREV:
       case self::TYPE_REVIEWER_FOR_DREV:
         return '%s added %d revision(s): %s.';
@@ -290,8 +278,6 @@
         return '%s removed %d commit(s): %s.';
       case self::TYPE_MOCK_HAS_TASK:
         return '%s removed %d task(s): %s.';
-      case self::TYPE_DREV_DEPENDS_ON_DREV:
-      case self::TYPE_DREV_DEPENDED_ON_BY_DREV:
       case self::TYPE_COMMIT_HAS_DREV:
       case self::TYPE_REVIEWER_FOR_DREV:
         return '%s removed %d revision(s): %s.';
@@ -333,8 +319,6 @@
         return '%s updated commits of %s.';
       case self::TYPE_MOCK_HAS_TASK:
         return '%s updated tasks of %s.';
-      case self::TYPE_DREV_DEPENDS_ON_DREV:
-      case self::TYPE_DREV_DEPENDED_ON_BY_DREV:
       case self::TYPE_COMMIT_HAS_DREV:
       case self::TYPE_REVIEWER_FOR_DREV:
         return '%s updated revisions of %s.';