diff --git a/_index.html b/_index.html
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--- a/_index.html
+++ b/_index.html
@@ -56,37 +56,15 @@
 </table>
 
 <div id="EGFConceptsText">
-    <p>EGF is an engine based on four types of generation unit: factory component, task, pattern and generation chain.</p>
-</div>
-
-	<h3>Software Factories Portfolios</h3>
-    <p>A software factory portfolio provides an off-the-shelf generation solution. EGF is released with two <a ref="http://wiki.eclipse.org/EGF/Portfolio">portfolios</a>: 
+    <p>EGF is an engine based on four types of generation unit:
         <ul>
-            <li><a ref="http://wiki.eclipse.org/EGF/Portfolio/EMF">Enhanced EMF Generation</a>: 1) it enriches the EMF generation with new generation topics (e.g., html doc, ecoretools diagrams, Java doc), 2) it opens the EMF Generation customization with the EGF patterns</li>
-            <li><a ref="http://wiki.eclipse.org/EGF/Portfolio/Build">Build chain editor and generator</a>: it provides 1) an editor to model a build chain for continuous integration, and 2) a generator with targets, by default, Hudson/jenkins and Buckminster</li>
+            <li>Task: it enables to execute code written in a language (e.g., Java, Ant, JRuby) and tools (e.g., Acceleo, ATL, Jet)</li>
+            <li>Factory component: it declares generation parameters and orchestrates calls to tasks or other factory components</li>
+            <li>Pattern: it is a powerful formalism which enables to process resources (e.g., model, file), in a language (e.g., Java, Jet), with parameters (e.g., navigation strategy, post-processor, reporter)</li>
+            <li>Generation Chain: it is a domain-specific model which enables to abstract generations</li>
         </ul>
+	EGF focuses is more than a generation tool. It is a tool of generative technique. For instance, to generate a software application, EGF can invoke model or text-to-text transformation engines.  
     </p>
-
-
-<table>
-	<tr>
-		<th><a title="Generation Chain" href="http://vimeo.com/29472598">
-			<img src="resources/EgfGenerationChain.png"/>
-			<div class="overlay"></div>
-			</a></th>
-		<th><p>Video: <strong>&nbsp;Generation Chain</strong></p>
-			<p>Coming soon: video on the enhancement of the EMF generation</p>
-			</th>
-	</tr>
-</table>
-
-<div>
-	<h3>Activity Workflow</h3>
-	<p>The EGF infrastructure does not strictly reduce EGF to generation. 
-	Software production includes related generation activities, such as the creation of the generation environment. 
-	As a consequence, EGF can just be used for its <b>activity workflow</b> 
-	(contained in a factory component) 
-	which enables to combine activities written in one or several different languages. Java and Ruby are the two languages supported today.</p>
 </div>
 
 <table>
@@ -101,6 +79,29 @@
 	</tr>
 </table>
 
+<div>
+	<h3>Software Factories Portfolios</h3>
+    <p>A software factory portfolio provides an off-the-shelf generation solution. EGF is released with two portfolios: 
+        <ul>
+            <li><b>Enhanced EMF Generation</b>: 1) it enriches the EMF generation with new generation topics (e.g., html doc, ecoretools diagrams, Java doc), 2) it opens the EMF Generation customization with the EGF patterns</li>
+            <li><b>Build chain editor and generator</b>: it provides 1) an editor to model a build chain for continuous integration, and 2) a generator with targets, by default, Hudson/jenkins and Buckminster</li>
+        </ul>
+    </p>
+</div>
+
+
+<table>
+	<tr>
+		<th><a title="Generation Chain" href="http://vimeo.com/29472598">
+			<img src="resources/EgfGenerationChain.png"/>
+			<div class="overlay"></div>
+			</a></th>
+		<th><p>Video: <strong>&nbsp;Generation Chain</strong></p>
+			<p>Coming soon: video on the enhancement of the EMF generation</p>
+			</th>
+	</tr>
+</table>
+
 </div>