diff --git a/README-extensions.rst b/README-extensions.rst
index da9ce85..7b537cf 100644
--- a/README-extensions.rst
+++ b/README-extensions.rst
@@ -691,3 +691,38 @@
         storage_type: yaml_fs
         # options for yaml_fs storage type
         uri: /srv/salt/env/pre-prod/classes
+
+
+Support to use current node parameters as references in class name
+------------------------------------------------------------------
+
+With the following reclass config:
+
+.. code-block::
+
+    => /etc/reclass/nodes/mynode.yml
+    classes:
+      - common
+    parameters:
+      project: myproject
+
+    => /etc/reclass/classes/common.yml
+    class:
+      - ${project}
+
+    => /etc/reclass/classes/myproject.yml
+    parameters:
+      some:
+        project: parameters
+
+
+Will get the following result for the parameters:
+
+.. code-block:: yaml
+
+    parameters:
+      project: myproject
+      some:
+        project: parameters
+
+