diff --git a/README.rst b/README.rst
index 41759cf..815f36d 100644
--- a/README.rst
+++ b/README.rst
@@ -236,6 +236,13 @@ These actions ar available:
     Deletes all empty fields from the content data.
     A field is considered empty if it is ``None``, ``[]``, ``{}`` or ``""``
 
+```analysis.json``
+------------------
+
+This file provide the index with analyzers to be used in mappingsjson different definition section (top-level, nested, complex or pipeline target).
+
+Read more on this topic in the dedicated section below.
+
 
 Start up
 ========