diff --git a/docs/index.rst b/docs/index.rst
index 3ddbd107f..f5c5f375d 100644
--- a/docs/index.rst
+++ b/docs/index.rst
@@ -31,7 +31,10 @@ Contents
    :maxdepth: 2
 
    Fundamentals <fundamentals>
-   Data Model <api/modules>
+   Data Model Overview <api/modules>
+   BusinessObjects <api/bo4e.bo>
+   Components <api/bo4e.com>
+   Enumerations <api/bo4e.enum>
    Versioning <versioning>
    Release Workflow <release_workflow>
    Contributing <contributing_guide>
@@ -39,7 +42,6 @@ Contents
    Authors <authors>
    License <license>
 
-
 Indices and tables
 ==================