Update spec/index.html

Co-authored-by: Andy Seaborne <[email protected]>

Author: 2 people

spec/index.html

@@ -758,7 +758,7 @@ <h3>Triples</h3>
 
     <p>The three components (|s|, |p|, |o|) of an [=RDF triple=] are respectively called the <dfn class=export >subject</dfn>, <dfn class=export >predicate</dfn> and <dfn class=export >object</dfn> of the triple.</p>
 
-    <p>The set of <span id="dfn-nodes"><!-- obsolete term--></span><dfn id="dfn-node" class="export" data-lt="RDF node">nodes</dfn> of an <a>RDF graph</a>
+    <p>The set of <span id="dfn-rdf-node"></span><span id="dfn-nodes"></span><dfn id="dfn-node" class="export" data-lt="RDF node">nodes</dfn> of an <a>RDF graph</a>
       is the set of <a>subjects</a> and <a>objects</a> of the <a>asserted triples</a> of the graph.
       It is possible for a [=predicate=] [=IRI=] to also occur as a [=node=] in
       the same graph.</p>