diff --git a/rdf/tbox/filegraph/object-properties.owl b/rdf/tbox/filegraph/object-properties.owl
index c65a8784..c5359d4e 100644
--- a/rdf/tbox/filegraph/object-properties.owl
+++ b/rdf/tbox/filegraph/object-properties.owl
@@ -178,7 +178,7 @@
 
     <owl:ObjectProperty rdf:about="http://purl.obolibrary.org/obo/BFO_0000051">
         <rdf:type rdf:resource="http://www.w3.org/2002/07/owl#TransitiveProperty"/>
-
+        <owl:inverseOf rdf:resource="http://purl.obolibrary.org/obo/BFO_0000050"/>
     </owl:ObjectProperty>
     
 
@@ -1022,7 +1022,7 @@ there is a measurement process p that has specified output m, a measurement datu
     <!-- http://purl.obolibrary.org/obo/RO_0000057 -->
 
     <owl:ObjectProperty rdf:about="http://purl.obolibrary.org/obo/RO_0000057">
-
+        <owl:inverseOf rdf:resource="http://purl.obolibrary.org/obo/BFO_0000056"/>
         <rdfs:domain rdf:resource="http://purl.obolibrary.org/obo/BFO_0000003"/>
         <rdfs:range rdf:resource="http://purl.obolibrary.org/obo/BFO_0000002"/>
     </owl:ObjectProperty>
@@ -1040,7 +1040,7 @@ there is a measurement process p that has specified output m, a measurement datu
     <!-- http://purl.obolibrary.org/obo/RO_0001015 -->
 
     <owl:ObjectProperty rdf:about="http://purl.obolibrary.org/obo/RO_0001015">
-
+        <owl:inverseOf rdf:resource="http://purl.obolibrary.org/obo/RO_0001025"/>
     </owl:ObjectProperty>
     
 
@@ -1048,7 +1048,7 @@ there is a measurement process p that has specified output m, a measurement datu
     <!-- http://purl.obolibrary.org/obo/RO_0001018 -->
 
     <owl:ObjectProperty rdf:about="http://purl.obolibrary.org/obo/RO_0001018">
-
+        <owl:inverseOf rdf:resource="http://purl.obolibrary.org/obo/RO_0001019"/>
     </owl:ObjectProperty>
     
 
@@ -1089,7 +1089,7 @@ there is a measurement process p that has specified output m, a measurement datu
     <!-- http://purl.obolibrary.org/obo/RO_0002234 -->
 
     <owl:ObjectProperty rdf:about="http://purl.obolibrary.org/obo/RO_0002234">
-
+        <owl:inverseOf rdf:resource="http://purl.obolibrary.org/obo/RO_0002353"/>
         <rdfs:subPropertyOf rdf:resource="http://purl.obolibrary.org/obo/RO_0000057"/>
     </owl:ObjectProperty>
     
@@ -2085,6 +2085,7 @@ there is a measurement process p that has specified output m, a measurement datu
     </owl:ObjectProperty>
 
 
+
 <!-- Generated by the OWL API (version 3.3.1957) http://owlapi.sourceforge.net -->
 
 </rdf:RDF>