--- a/dictionary/prov-dictionary.html	Wed Feb 27 10:21:03 2013 +0000
+++ b/dictionary/prov-dictionary.html	Wed Feb 27 11:41:29 2013 +0100
@@ -719,7 +719,8 @@
 <p>
 Provenance is information about entities, activities, and people
 involved in producing a piece of data or thing, which can be used to
-form assessments about its quality, reliability or trustworthiness. This document describes extensions to PROV to facilitate the modeling of provenance for dictionary data structures.
+form assessments about its quality, reliability or trustworthiness. This document describes extensions to PROV to facilitate the modeling of provenance for dictionary data structures. [[PROV-DM]] specifies a <a href="http://www.w3.org/TR/2013/PR-prov-dm-20130312/Overview.html#component6">Collection</a> as an entity that provides a structure to some constituents, which are themselves entities. However, some applications may need a mechanism to specify more structure to a Collection, in order to accurately describe its provenance. 
+Therefore, in this document, we introduce Dictionary, a specific type of Collection with a logical structure consisting of key-value pairs.
 </p>
 
 <p>The  <a href="http://www.w3.org/TR/2012/WD-prov-overview-20121211/">PROV Document Overview</a> describes the overall state of PROV, and should be read before other PROV documents.</p>