--- a/model/ProvenanceModel.html	Thu Jul 21 20:28:38 2011 +0100
+++ b/model/ProvenanceModel.html	Mon Jul 25 22:19:13 2011 +0100
@@ -13,6 +13,7 @@
      </style>
 
     <script src="http://dev.w3.org/2009/dap/ReSpec.js/js/respec.js" class="remove"></script> 
+
     <script class="remove"> 
       var respecConfig = {
           // specification status (e.g. WD, LCWD, NOTE, etc.). If in doubt use ED.
@@ -96,6 +97,10 @@
 </h2> 
       <p> To be written </p>
 
+<p>The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL
+      NOT", "SHOULD", "SHOULD NOT", "RECOMMENDED",  "MAY", and
+      "OPTIONAL" in this document are to be interpreted as described in
+      [[!RFC2119]].</p>
 
     </section> 
 
@@ -515,6 +520,13 @@
 of characterized entity denoted by <b>A</b> precedes the generation of
 the characterized entity denoted by <b>B</b>.
 
+<div class='issue'>Is derivation transitive? If so, it should not be introduced as an assertion.  This is <a href="http://www.w3.org/2011/prov/track/issues/45">ISSUE-45</a>.</div>
+
+<div class='issue'>Should derivation have a time?  <a href="http://www.w3.org/2011/prov/track/issues/43">ISSUE-43</a>.</div>
+
+<div class='issue'>Should we specifically mention derivation of agents?  <a href="http://www.w3.org/2011/prov/track/issues/42">ISSUE-42</a>.</div>
+
+
 </section>
 
 <section id="concept-Agent">
@@ -673,6 +685,9 @@
 
 <p> The set of all Use (resp. Generation, Control) assertions that refer to a given process execution MUST contain at most one occurrence of a given role.</p>
 
+<div class='issue'>Decide the level of requirements: MUST/SHOULD and justify. This is <a href="http://www.w3.org/2011/prov/track/issues/40">ISSUE-40</a> and <a href="http://www.w3.org/2011/prov/track/issues/41">ISSUE-41</a>.</div>
+
+
 <p>The interpretation of a  role is specific to the process execution it relates
 to, which means that a same role may appear in relation to two different process executions with different interpretations.  
 From this specification's viewpoint, a role's interpretation is out of
@@ -786,6 +801,13 @@
 
     </section> 
 
+    <section> 
+<h2>Shortcuts and extensions</h2>
+
+<div class='issue'>There are a number of commonly used provenance relations in particular for the web that are not in the model. For practical use and uptake, it would be good to have definitions of these in the provenance model. These concepts should be defined in terms of the already existing "core" concepts. This is  <a href="http://www.w3.org/2011/prov/track/issues/44">ISSUE-44</a>.</div>
+    </section> 
+
+
 <section class="appendix"> 
       <h2>Acknowledgements</h2> 
       <p>