--- a/rdf-primer/index.html	Wed Nov 20 11:11:14 2013 +0100
+++ b/rdf-primer/index.html	Wed Nov 20 14:40:15 2013 +0100
@@ -747,7 +747,9 @@
     <p>This RDF dataset contains two named graphs. Lines 8 and 16 list
     the names of these two graphs. The triples in the named graph are
     placed in between matching curly braces (lines 9 &amp; 15, 18 &amp;
-    28).<p>
+    28). Optionally you can precede the graph name with the keyword
+    <code>GRAPH</code>. This may improve readability, but it is mainly
+    introduced for alignment with SPARQL Update [[SPARQL-REF]]. </p>
 
     <p>The syntax of the triples and of the directives at the top conforms to
     the Turtle syntax.</p>