diff --git a/rdf/tbox/filegraph/object-properties.owl b/rdf/tbox/filegraph/object-properties.owl
index de3c61f0..637f7a23 100644
--- a/rdf/tbox/filegraph/object-properties.owl
+++ b/rdf/tbox/filegraph/object-properties.owl
@@ -1549,9 +1549,16 @@ there is a measurement process p that has specified output m, a measurement datu
 
     <owl:ObjectProperty rdf:about="http://vivoweb.org/ontology/core#translatorOf">
         <rdfs:domain rdf:resource="http://xmlns.com/foaf/0.1/Agent"/>
-        <rdfs:range rdf:resource="http://purl.org/ontology/bibo/Document"/>
+        <rdfs:range>
+            <owl:Class>    
+                <owl:unionOf rdf:parseType="Collection">
+                    <owl:Class rdf:about="http://purl.org/ontology/bibo/Collection"/>
+                    <owl:Class rdf:about="http://purl.org/ontology/bibo/Document"/>
+               </owl:unionOf>
+            </owl:Class>    
+        </rdfs:range>
     </owl:ObjectProperty>
-    
+     
 
 
     <!-- http://vivoweb.org/ontology/scientific-research#accessProvidedBy -->
diff --git a/rdf/tbox/filegraph/objectRanges.rdf b/rdf/tbox/filegraph/objectRanges.rdf
index 4e3d9b3b..a4431cc6 100644
--- a/rdf/tbox/filegraph/objectRanges.rdf
+++ b/rdf/tbox/filegraph/objectRanges.rdf
@@ -27,7 +27,14 @@
     xmlns:swrl="http://www.w3.org/2003/11/swrl#"
     xmlns:rdfs="http://www.w3.org/2000/01/rdf-schema#">
   <rdf:Description rdf:about="http://vivoweb.org/ontology/core#translatorOf">
-    <rdfs:range rdf:resource="http://purl.org/ontology/bibo/Document"/>
+    <rdfs:range>
+      <owl:Class>    
+        <owl:unionOf rdf:parseType="Collection">
+          <owl:Class rdf:about="http://purl.org/ontology/bibo/Collection"/>
+          <owl:Class rdf:about="http://purl.org/ontology/bibo/Document"/>
+        </owl:unionOf>
+      </owl:Class>
+    </rdfs:range>
   </rdf:Description>
   <rdf:Description rdf:about="http://vivoweb.org/ontology/core#hasSuccessorOrganization">
     <rdfs:range rdf:resource="http://xmlns.com/foaf/0.1/Organization"/>