diff --git a/rdf/onto1.owl b/rdf/onto1.owl
index 214a8c0b1b292f1b3f3e4ed45cdc41b315da9624..f87cb252b039b83f655e73ee3666e637c4db74d0 100644
--- a/rdf/onto1.owl
+++ b/rdf/onto1.owl
@@ -15,11 +15,11 @@
 </owl:Class>
 
 <owl:Class rdf:ID="reviewedarticle">
-  <rdfs:subClassOf rdf:about="#publication"/>
+  <rdfs:subClassOf rdf:resource="#publication"/>
 </owl:Class>
 
 <owl:Class rdf:ID="journalarticle">
-  <rdfs:subClassOf rdf:about="#reviewedarticle"/>
+  <rdfs:subClassOf rdf:resource="#reviewedarticle"/>
 </owl:Class>
 
 </rdf:RDF>
diff --git a/rdf/onto2.owl b/rdf/onto2.owl
index ca7ce38bbaa70464a982376e87556efb32d74cf8..ebecf0d4c2fe6e035d5f7abac555bcdfa2f16e5f 100644
--- a/rdf/onto2.owl
+++ b/rdf/onto2.owl
@@ -14,11 +14,16 @@
 </owl:Class>
 
 <owl:Class rdf:ID="article">
-  <rdfs:subClassOf rdf:about="#reference"/>
+  <rdfs:subClassOf rdf:resource="#reference"/>
 </owl:Class>
 
 <owl:Class rdf:ID="journalarticle">
-  <rdfs:subClassOf rdf:about="#article"/>
+  <rdfs:subClassOf rdf:resource="#article"/>
 </owl:Class>
 
+<owl:Class rdf:ID="journalarticledgfg">
+  <rdfs:subClassOf rdf:resource="#article"/>
+</owl:Class>
+
+
 </rdf:RDF>