--- a/rdf-turtle/index.html	Thu May 17 12:09:13 2012 -0700
+++ b/rdf-turtle/index.html	Thu May 17 12:12:11 2012 -0700
@@ -155,7 +155,7 @@
       </p>
     </section>
 	
-	<section id="sec-intro">
+	<section id="sec-intro" class="informative">
 			<h2>Introduction</h2>
 
 			<p>
@@ -960,7 +960,7 @@
         <code>type</code> attribute set to <code>text/turtle</code>. <code>&lt;</code> and <code>&gt;</code> symbols
         do not need to be escaped inside of script tags. The character encoding of the embedded Turtle
         MUST match the HTML documents encoding.</p>
-        <section>
+        <section class="informative">
           <h3>XHTML</h3>
           <p>
           Like JavaScript, Turtle authored for HTML (<code>text/html</code>) can break when used in an XHTML 
@@ -977,7 +977,7 @@
           <p>When embedded in XHTML Turtle data blocks MUST be enclosed in CDATA sections. Those CDATA markers MUST be in Turtle comments. If the character sequence "<code>]]></code>" occurs in the document it MUST be escaped using strings escapes (<code>\u005d\u0054\u003e</code>). This will also make Turtle safe in polyglot documents served as both <code>text/html</code>
           and <code>application/xhtml+xml</code>.</p>
         </section>
-        <section>
+        <section class="informative">
           <h3>Displaying Examples</h3>
           <p>
           It is possible to display the contents of script tags containing Turtle for use in examples or other guides
@@ -994,7 +994,7 @@
           SHOULD only use <code>text/html</code>.
           </p>
         </section>
-        <section id="in-html-parsing">
+        <section id="in-html-parsing" class="informative">
           <h3>Parsing Turtle in HTML</h3>
           <p>There are no syntactic or grammar differences between parsing Turtle that has been embedded 
           and normal Turtle documents. Each <code>script</code> data block is considered to be it's own 
@@ -1026,7 +1026,7 @@
 			</p>
 			<p>The RDF graph represented by an N-Triples document contains exactly each triple matching <a href="#prod-ntriples-triple">N-Triples <code>triple</code> production</a>.
 
-        <section>
+        <section class="informative">
         	<h3>Summary of diffrences in N-Triples and Turtle</h3>
         	<section>
         		<h4>Triples</h4>
@@ -1192,7 +1192,7 @@
 			registration form.
 			</p>
 
-			<section>
+			<section class="informative">
 				<h3>Other Media Types</h3>
 				<p>N-Triples has been historically provided with other media types. N-Triples may also be provided as <code>text/plain</code>. When used in this way N-Triples MUST use the escaped form of any character outside US-ASCII. As N-Triples is a subset of Turtle a N-Triples document MAY also be provided as <code>text/turtle</code>. In both of these cases the document is not an N-Triples document as an N-Triples document is only provided as <code>application/n-triples</code>.</p>
 			</section>