prep for xml feature

org.eclipse.wtp.releng.webupdatesite/WebContent/siteEuropa.xml

 <?xml version="1.0" encoding="UTF-8"?>
 <site
-        digestURL="http://download.eclipse.org/webtools/declaredUpdates/"
-        pack200="true"
-        mirrorsURL="http://www.eclipse.org/downloads/download.php?file=/webtools/declaredUpdates/site.xml&amp;format=xml">
+    digestURL="http://download.eclipse.org/webtools/declaredUpdates/"
+    pack200="true"
+    mirrorsURL="http://www.eclipse.org/downloads/download.php?file=/webtools/declaredUpdates/site.xml&amp;format=xml">
 
 
     <description
@@ -79,9 +79,34 @@
         version="1.0.0.v200704250000-2--84B22MbYFN02FmRkMEESZRDDz">
         <category name="Web Tools Platform (WTP)" />
     </feature>
+    <feature
+        id="org.eclipse.wst.xml_sdk.feature"
+        url="features/org.eclipse.wst.xml_sdk.feature_1.0.0.v200704250000-2--84B22MbYFN02FmRkMEESZRDDz.jar"
+        version="1.0.0.v200704250000-2--84B22MbYFN02FmRkMEESZRDDz">
+        <category name="Web Tools Platform (WTP)" />
+    </feature>
+    <feature
+        id="org.eclipse.wst.common_sdk.feature"
+        url="features/org.eclipse.wst.common_sdk.feature_1.0.0.v200704250000-2--84B22MbYFN02FmRkMEESZRDDz.jar"
+        version="1.0.0.v200704250000-2--84B22MbYFN02FmRkMEESZRDDz">
+        <category name="Enabling Features" />
+    </feature>
+    <feature
+        id="org.eclipse.wst.common_ui.feature"
+        url="features/org.eclipse.wst.common_ui.feature_1.0.0.v200704250000-2--84B22MbYFN02FmRkMEESZRDDz.jar"
+        version="1.0.0.v200704250000-2--84B22MbYFN02FmRkMEESZRDDz">
+        <category name="Enabling Features" />
+    </feature>
 
-
-
+    <category-def
+        label="Enabling Features"
+        name="Enabling Features">
+        <description>
+            These features provide functionality required by one or more
+            projects, but do not provide end-user functionality by
+            themselves.
+        </description>
+    </category-def>
 
     <category-def
         label="Web Tools Platform (WTP)"