--- a/model/working-copy/towards-wd4.html	Mon Feb 20 16:55:29 2012 +0000
+++ b/model/working-copy/towards-wd4.html	Mon Feb 20 22:53:29 2012 +0000
@@ -396,16 +396,12 @@
 <p>Activities and entities are associated with each other in two different ways: activities are consumers of entities and activities are producers of entities.  For the purpose of provenance, we define the following notions of generation and usage. </p>
 
 <p>
-<div class="glossary-ref" id="glossary-generation">
-<dfn title="concept-generation">Generation</dfn> is the completed production of a new entity by an activity.
- This entity becomes available for usage after this generation. This entity did not exist before generation. 
+<div class="glossary-ref" ref="glossary-generation">
 </div>
 </p>
 
 <p>
-<div class="glossary-ref" id="glossary-usage">
-<dfn title="concept-usage">Usage</dfn> is the beginning of an entity being consumed by an activity.
-Before usage, the activity had not begun to consume or use this entity (and could not have been affected by the entity).
+<div class="glossary-ref" ref="glossary-usage">
 </div>
 </p>
 
@@ -427,8 +423,7 @@
 <p>Activities are consumers of entities and producers of entities. In some case, the consumption of an entity influences the creation of another in some way. This notion is captured by derivations, defined as follows.</p>
 
 <p>
-<span class="glossary-ref" id="glossary-derivation">
-<dfn title="concept-derivation">Derivation</dfn> is something by which some entity is transformed from, created from, or affected by another entity in the world.  </span>
+<span class="glossary-ref" ref="glossary-derivation">
 </p>
 
 
@@ -2243,4 +2238,5 @@
 -->
 </div>
 
- </body></html>
+ </body>
+</html>