symfony
diff --git a/‎contributing/code/bc.rst
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+14Lines changed: 14 additions & 0 deletions b/‎contributing/code/bc.rst
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+14Lines changed: 14 additions & 0 deletions
@@ -54,6 +54,13 @@ means that:
 * You can safely implement the interface.
 
 
+Internal Interfaces
+...................
+
+Interfaces or interface methods tagged with ``@internal`` are meant for internal
+use in Symfony only and should never be used nor implemented.
+
+
 Safe Operations
 ...............
 
@@ -118,6 +125,13 @@ that:
 * You can safely override public or protected methods.
 
 
+Internal Classes
+................
+
+Classes, properties and class methods tagged with ``@internal`` are meant for
+internal use in Symfony only and should never be used nor extended.
+
+
 Safe Operations
 ...............