--- a/rdf-primer/index.html	Mon Feb 03 14:47:24 2014 +0100
+++ b/rdf-primer/index.html	Mon Feb 03 15:43:20 2014 +0100
@@ -215,7 +215,7 @@
       <li>Building distributed social networks by interlinking RDF
       descriptions of people 
       across multiple Web sites.</li>
-      <li>Providing a standard-compliant way for exchanging data
+      <li>Providing a standards-compliant way for exchanging data
       between databases.</li> 
       <li>Interlinking various datasets within an organisation,
       enabling cross-dataset queries to 
@@ -248,7 +248,7 @@
     <strong>triples</strong>.</p>
     -->
     
-    <p>An RDF statement represents a relationship between two resources.
+    <p>An RDF statement expresses a relationship between two resources.
     The <strong>subject</strong> and the <strong>object</strong>
     represent the two resources being
     related; the <strong>predicate</strong> represents the nature of their
@@ -258,8 +258,7 @@
     three elements they are called <strong>triples</strong>.
     </p>
     
-    <p>Informally speaking, RDF allows us to make
-    statements of the form:</p> 
+    <p>RDF allows us to make statements of the form:</p> 
 
     <pre class="example" id="example-1">
       &lt;Bob&gt; &lt;is a&gt; &lt;person&gt;.
@@ -508,9 +507,10 @@
 
     <p>RDF Schema uses the notion of <strong>class</strong> to
     specify categories that can be used to classify resources. The
-    relation between an instance and its class is modelled through the
-    <strong>type</strong> property. For both classes and properties one can create
-    subtype hierarchies. Type restrictions on the subjects
+    relation between an instance and its class is stated through the
+    <strong>type</strong> property. One can create create hierarchies
+    of classes and sub-classes and of
+    properties and sub-properties. Type restrictions on the subjects
     and objects of particular triples can be defined through
     <strong>domain</strong> and <strong>range</strong>
     restrictions. An example of a domain restriction was given above: