--- a/model/ProvenanceModel.html	Wed Sep 14 11:44:00 2011 +0100
+++ b/model/ProvenanceModel.html	Wed Sep 14 11:59:15 2011 +0100
@@ -777,8 +777,22 @@
 <span class="nonterminal">Literal</span>
 </div>
 
-
-<div class='note'>Luc to explain what it is, refer to annotationAssociation</div>
+<p>A separate expression is used to associate an annotation with an expression (see <a href="#expression-annotationAssociation">Section on annotation association</a>). A give annotation may be associated with multiple expressions.
+</p>
+
+
+<p>
+The following annotation expression
+<pre class="example">
+annotation(ann1,[color="bue", screenX=20, screenY=30])
+</pre>
+consists of a list of application-specific name-value pairs, intended
+to help the rendering the expression it is associated with, by
+specifying its color and its position on the screen.  In this example,
+these name-value pairs do not constitute a representation of something
+in the world; they are just used to help render provenance.
+</p>
+
 
    </section>