diff --git a/doc/new-iter-concepts.html b/doc/new-iter-concepts.html
index 380256b..848c882 100755
--- a/doc/new-iter-concepts.html
+++ b/doc/new-iter-concepts.html
@@ -235,8 +235,8 @@ Bidirectional Iterator (2) -> Bidirectional Traversal Iterator and Writable I
 </div>
 <div class="section" id="design">
 <h1><a class="toc-backref" href="#id3" name="design">Design</a></h1>
-<p>The iterator requirements are to be separated into two hierarchies. One
-set of concepts handles the syntax and semantics of value access:</p>
+<p>The iterator requirements are to be separated into two groups. One set
+of concepts handles the syntax and semantics of value access:</p>
 <ul class="simple">
 <li>Readable Iterator</li>
 <li>Writable Iterator</li>
@@ -276,8 +276,8 @@ but instead use the equivalent of a bitfield.</p>
 <p>We provide an access mechanism for mapping iterator types to the new
 traversal tags and access bitfield. Our design reuses
 <tt class="literal"><span class="pre">iterator_traits&lt;Iter&gt;::iterator_category</span></tt> as the access
-mechanism. To that end, a pair of access and traversal tags are
-combined into a single type using the following <cite>iterator_tag</cite> class.</p>
+mechanism. To that end, the access and traversal information is
+bundled into a single type using the following <cite>iterator_tag</cite> class.</p>
 <pre class="literal-block">
 enum iterator_access { readable_iterator = 1, writable_iterator = 2, 
     swappable_iterator = 4, lvalue_iterator = 8 };
diff --git a/doc/new-iter-concepts.rst b/doc/new-iter-concepts.rst
index dca1700..381449d 100644
--- a/doc/new-iter-concepts.rst
+++ b/doc/new-iter-concepts.rst
@@ -208,8 +208,8 @@ Input Iterator (2) -> Incrementable Iterator and Readable Iterator
  Design
 ========
 
-The iterator requirements are to be separated into two hierarchies. One
-set of concepts handles the syntax and semantics of value access:
+The iterator requirements are to be separated into two groups. One set
+of concepts handles the syntax and semantics of value access:
 
 - Readable Iterator
 - Writable Iterator
@@ -256,8 +256,8 @@ but instead use the equivalent of a bitfield.
 We provide an access mechanism for mapping iterator types to the new
 traversal tags and access bitfield. Our design reuses
 ``iterator_traits<Iter>::iterator_category`` as the access
-mechanism. To that end, a pair of access and traversal tags are
-combined into a single type using the following `iterator_tag` class.
+mechanism. To that end, the access and traversal information is
+bundled into a single type using the following `iterator_tag` class.
 
 ::