diff --git a/rdf/tbox/filegraph/object-properties.owl b/rdf/tbox/filegraph/object-properties.owl
index 1f06a387..f61d226f 100644
--- a/rdf/tbox/filegraph/object-properties.owl
+++ b/rdf/tbox/filegraph/object-properties.owl
@@ -558,24 +558,6 @@
         <obo:IAO_0000111 rdf:datatype="http://www.w3.org/2001/XMLSchema#string">related technique</obo:IAO_0000111>
         <rdfs:range rdf:resource="http://purl.obolibrary.org/obo/ERO_0000007"/>
         <obo:IAO_0000114 rdf:resource="http://purl.obolibrary.org/obo/IAO_0000120"/>
-        <rdfs:domain>
-            <owl:Class>
-                <owl:unionOf rdf:parseType="Collection">
-                    <rdf:Description rdf:about="http://purl.obolibrary.org/obo/ERO_0000004"/>
-                    <rdf:Description rdf:about="http://purl.obolibrary.org/obo/ERO_0000005"/>
-                    <rdf:Description rdf:about="http://purl.obolibrary.org/obo/ERO_0000009"/>
-                    <rdf:Description rdf:about="http://purl.obolibrary.org/obo/ERO_0000071"/>
-                    <rdf:Description rdf:about="http://purl.obolibrary.org/obo/ERO_0000161"/>
-                    <rdf:Description rdf:about="http://purl.obolibrary.org/obo/ERO_0000162"/>
-                    <rdf:Description rdf:about="http://purl.obolibrary.org/obo/ERO_0000285"/>
-                    <rdf:Description rdf:about="http://purl.obolibrary.org/obo/ERO_0000630"/>
-                    <rdf:Description rdf:about="http://purl.obolibrary.org/obo/ERO_0001194"/>
-                    <rdf:Description rdf:about="http://purl.obolibrary.org/obo/ERO_0001200"/>
-                    <rdf:Description rdf:about="http://purl.obolibrary.org/obo/ERO_0001716"/>
-                    <rdf:Description rdf:about="http://purl.obolibrary.org/obo/OBI_0400147"/>
-                </owl:unionOf>
-            </owl:Class>
-        </rdfs:domain>
     </owl:ObjectProperty>