--- a/model/working-copy/towards-wd4.html	Wed Feb 08 09:51:55 2012 +0000
+++ b/model/working-copy/towards-wd4.html	Wed Feb 08 10:49:35 2012 +0000
@@ -304,17 +304,9 @@
 </div>
 -->
 
-<p>An <dfn id="concept-activity">Activity</dfn> is anything that can operate on entities. In particular, activities may produce, consume, transform an entity. Activities that operate on digital entities may for example move, copy, or duplicate them.
-
+<p>An <dfn id="concept-activity">Activity</dfn> is anything that can operate on entities. In particular, activities may produce, consume, or transform an entity. Activities that operate on digital entities may for example move, copy, or duplicate them.
 
 
-<!--
-<p>In the world, <dfn id="concept-activity">activities</dfn> involve
-entities in multiple ways:  consuming them,  processing them, 
-transforming them,  modifying them,  changing them,  relocating
-them,  using them,  generating them, being associated with them,
-etc.</p>
--->
 
 <div class="anexample" id="activity-example">
 An activity may be the publishing of a document on the web, sending a tweet, extracting metadata embedded in a file, or driving a car from Boston to Cambridge, assembling a data set based on a set of measurements, performing a statistical analysis over a data set, sorting news items according to some criteria, running a sparql query over a triple store, and editing a file.
@@ -396,9 +388,12 @@
 </p>
 </div>
 
-<p>The <dfn id="collection">Collection</dfn> type is used to represent entities that have internal structure. PROV-DM defines provenance constructs for a very general type of collection, namely a set of key-value pairs (referred to as a <em>map</em> or, in some programming languages, a <em>dictionary</em> or <em>associative array</em>). This can be used to describe other collection types, including for example nested ordered lists. The definition of such more specific types is out of the scope of PROV-DM.
+<p>A <dfn id="concept-collection">Collection</dfn> is an entity that has internal structure. PROV-DM defines provenance constructs for a very general type of collection, namely a set of key-value pairs (referred to as a <em>map</em> or, in some programming languages, a <em>dictionary</em> or <em>associative array</em>). This can be used to describe other collection types, including for example nested ordered lists. The definition of such more specific types is out of the scope of PROV-DM.
 </p>
 
+
+<p>A <dfn id="concept-accountEntity">AccountEntity</dfn> is an entity that is contains a bundle of provenance assertions. </p>
+
 <p>Three types of agents are recognized by PROV-DM because they are commonly encountered in application making data and documents available on the Web: persons, software agents, and organizations.</p>
 
 <p> Even software agents can be assigned some responsibility for the effects they have in the world, so for example if one is using a Text Editor and one's laptop crashes, then one would say