diff --git a/org.fortiss.tooling.kernel.ui/html/developer/.ratings b/org.fortiss.tooling.kernel.ui/html/developer/.ratings
index 9ce98f51f6a49f49df2fd4351fd7739ff99393c5..ee92c198abe6b301057dea70bfcfa1c3e263f6a0 100644
--- a/org.fortiss.tooling.kernel.ui/html/developer/.ratings
+++ b/org.fortiss.tooling.kernel.ui/html/developer/.ratings
@@ -1 +1 @@
-documentation.html 4c96abcfe1108147602c98156ca5d755d65f9d96 RED
+documentation.html d880343666d4764c27186bcbc4d12b5d3106a9a9 YELLOW
diff --git a/org.fortiss.tooling.kernel.ui/html/developer/documentation.html b/org.fortiss.tooling.kernel.ui/html/developer/documentation.html
index 4c96abcfe1108147602c98156ca5d755d65f9d96..d880343666d4764c27186bcbc4d12b5d3106a9a9 100644
--- a/org.fortiss.tooling.kernel.ui/html/developer/documentation.html
+++ b/org.fortiss.tooling.kernel.ui/html/developer/documentation.html
@@ -1,4 +1,21 @@
-<html><body>
-<H1>Developer Documentation for <I>org.fortiss.tooling.kernel.ui</I></H1>
-<P>// TODO
-</body></html>
+<html>
+<body>
+<h1>Developer Documentation for Tooling Kernel UI (<i>org.fortiss.tooling.kernel.ui</i>)</h1>
+
+<p>
+This plugin provides the UI related kernel services
+<ul>
+<li><code>IActionService</code>: registration and management of actions</li>
+<li><code>IAllocationEditPartFactoryService</code>: allocations between any two graphical editors.</li>
+<li><code>IConstraintUIService</code>: Constraints UI support.</li>
+<li><code>IContextMenuService</code>: model element specific context menus</li>
+<li><code>IEditPartFactoryService</code>: edit part factories</li>
+<li><code>IMarkerService</code>: markers to display results obtained from <code>IConstraintCheckerService</code></li>
+<li><code>IModelEditorBindingService</code>: Opening and closing of editors</li>
+<li><code>IModelElementHandlerService</code>: element &quot;handling&quot; (i.e., retrieving
+information such as name, icon, ..., etc. about model elements)</li>
+<li><code>INavigatorService</code>: Model element navigator</li>
+<li><code>ITutorialUIService</code>: Tutorial mode UI support</li>
+</ul>
+</body>
+</html>
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