--- a/doc/introduction.rst	Sun Mar 18 19:13:35 2018 +0100
+++ b/doc/introduction.rst	Sun Mar 18 19:15:01 2018 +0100
@@ -28,6 +28,12 @@
 .. note:: All strings are returned as Unicode text strings.
 
 
+An example is:
+
+.. literalinclude:: ../tests/data/conf10.yml
+   :language: yaml
+
+
 .. _ini-files:
 
 INI Files
@@ -63,9 +69,20 @@
 .. note:: Contrary to the behaviour of the standard Python :mod:`configparser`
           module the INI file reader is *case-sensitive*.
 
-.. todo:: Implement tree-ish interpretation of INI files
+.. todo:: Document the build of tree-ish configuration settings out of
+          INI files.
+
+The example INI style configuration below yields an equivalent
+configuration to the YAML configuration above:
 
-   Currently there is no tree.
+.. literalinclude:: ../tests/data/conf10.ini
+   :language: ini
+
+As can be seen in thie example -- INI file internal value interpolation
+is done as in Python's standard :mod:`configparser` module.
+
+This example also illustrates how INI sections are used to build a
+tree-ish configuration dictionary.
 
 
 .. _executable-python-scripts:
@@ -90,3 +107,9 @@
 
 .. note:: The Python configuration files are evaluated with ``exec`` and not
           imported.
+
+The example configuration by Python script below yields an equivalent
+configuration to the YAML configuration above:
+
+.. literalinclude:: ../tests/data/conf10.py
+   :language: python