diff --git a/source/index.rst b/source/index.rst
index 054b523..db62934 100644
--- a/source/index.rst
+++ b/source/index.rst
@@ -6,6 +6,13 @@
 Welcome to CAcert code documentation's documentation!
 =====================================================
 
+This is a work in progress documentation of the CAcert web application source
+code at https://git.cacert.org/gitweb/?p=cacert.git.
+
+The goal is to document the existing code base to give insight into its
+functionality and to support writing a specification for a potential
+reimplementation.
+
 .. toctree::
    :maxdepth: 2
    :caption: Contents: