diff --git a/src/owl/bfo-core.ofn b/src/owl/bfo-core.ofn
index 709424e..7948556 100644
--- a/src/owl/bfo-core.ofn
+++ b/src/owl/bfo-core.ofn
@@ -9,8 +9,8 @@ Prefix(rdfs:=<http://www.w3.org/2000/01/rdf-schema#>)
 Prefix(skos:=<http://www.w3.org/2004/02/skos/core#>)
 
 
-Ontology(<http://purl.obolibrary.org/obo/bfo>
-<http://purl.obolibrary.org/obo/bfo/2020/bfo>
+Ontology(<http://purl.obolibrary.org/obo/bfo.owl>
+<http://purl.obolibrary.org/obo/bfo/2020/bfo-core.ofn>
 Annotation(dc11:contributor "Alan Ruttenberg")
 Annotation(dc11:contributor "Albert Goldfain")
 Annotation(dc11:contributor "Barry Smith")
diff --git a/src/owl/bfo-core.ttl b/src/owl/bfo-core.ttl
index 70d3300..768c070 100644
--- a/src/owl/bfo-core.ttl
+++ b/src/owl/bfo-core.ttl
@@ -9,8 +9,8 @@
 @prefix skos: <http://www.w3.org/2004/02/skos/core#> .
 @base <http://purl.obolibrary.org/obo/bfo> .
 
-<http://purl.obolibrary.org/obo/bfo> rdf:type owl:Ontology ;
-                                      owl:versionIRI <http://purl.obolibrary.org/obo/bfo/2020/bfo> ;
+<http://purl.obolibrary.org/obo/bfo.owl> rdf:type owl:Ontology ;
+                                      owl:versionIRI <http://purl.obolibrary.org/obo/bfo/2020/bfo-core.ttl> ;
                                       dc11:contributor "Alan Ruttenberg" ,
                                                        "Albert Goldfain" ,
                                                        "Barry Smith" ,
diff --git a/src/owl/profiles/atemporal/bfo-2020-without-some-all-times.ofn b/src/owl/profiles/atemporal/bfo-2020-without-some-all-times.ofn
index 4b9d992..f7c1218 100644
--- a/src/owl/profiles/atemporal/bfo-2020-without-some-all-times.ofn
+++ b/src/owl/profiles/atemporal/bfo-2020-without-some-all-times.ofn
@@ -9,8 +9,8 @@ Prefix(rdfs:=<http://www.w3.org/2000/01/rdf-schema#>)
 Prefix(skos:=<http://www.w3.org/2004/02/skos/core#>)
 
 
-Ontology(<http://purl.obolibrary.org/obo/bfo>
-<http://purl.obolibrary.org/obo/bfo/2020/notime/bfo.owl>
+Ontology(<http://purl.obolibrary.org/obo/bfo.owl>
+<http://purl.obolibrary.org/obo/bfo/2020/notime/bfo.ofn>
 Annotation(dc11:contributor "Alan Ruttenberg")
 Annotation(dc11:contributor "Albert Goldfain")
 Annotation(dc11:contributor "Barry Smith")
diff --git a/src/owl/profiles/atemporal/bfo-2020-without-some-all-times.ttl b/src/owl/profiles/atemporal/bfo-2020-without-some-all-times.ttl
index 27260d3..35ea321 100644
--- a/src/owl/profiles/atemporal/bfo-2020-without-some-all-times.ttl
+++ b/src/owl/profiles/atemporal/bfo-2020-without-some-all-times.ttl
@@ -9,8 +9,8 @@
 @prefix skos: <http://www.w3.org/2004/02/skos/core#> .
 @base <http://purl.obolibrary.org/obo/bfo> .
 
-<http://purl.obolibrary.org/obo/bfo> rdf:type owl:Ontology ;
-                                      owl:versionIRI <http://purl.obolibrary.org/obo/bfo/2020/notime/bfo.owl> ;
+<http://purl.obolibrary.org/obo/bfo.owl> rdf:type owl:Ontology ;
+                                      owl:versionIRI <http://purl.obolibrary.org/obo/bfo/2020/notime/bfo.ttl> ;
                                       dc11:contributor "Alan Ruttenberg" ,
                                                        "Albert Goldfain" ,
                                                        "Barry Smith" ,
diff --git a/src/owl/profiles/temporal extensions/temporalized relations/owl/bfo-temporalized-relations.ofn b/src/owl/profiles/temporal extensions/temporalized relations/owl/bfo-temporalized-relations.ofn
index c94a2ff..b05cf40 100644
--- a/src/owl/profiles/temporal extensions/temporalized relations/owl/bfo-temporalized-relations.ofn	
+++ b/src/owl/profiles/temporal extensions/temporalized relations/owl/bfo-temporalized-relations.ofn	
@@ -10,8 +10,8 @@ Prefix(rdfs:=<http://www.w3.org/2000/01/rdf-schema#>)
 Prefix(skos:=<http://www.w3.org/2004/02/skos/core#>)
 
 
-Ontology(<http://purl.obolibrary.org/obo/bfo-temporalized-relations.owl>
-<http://purl.obolibrary.org/obo/bfo/2020/bfo-temporalized-relations.owl>
+Ontology(<http://purl.obolibrary.org/obo/bfo.owl>
+<http://purl.obolibrary.org/obo/bfo/2020/bfo.owl>
 Annotation(dc11:contributor "Alan Ruttenberg")
 Annotation(dc11:contributor "Albert Goldfain")
 Annotation(dc11:contributor "Barry Smith")
diff --git a/src/owl/profiles/temporal extensions/temporalized relations/owl/bfo-temporalized-relations.ttl b/src/owl/profiles/temporal extensions/temporalized relations/owl/bfo-temporalized-relations.ttl
index 6aa67e6..4143c03 100644
--- a/src/owl/profiles/temporal extensions/temporalized relations/owl/bfo-temporalized-relations.ttl	
+++ b/src/owl/profiles/temporal extensions/temporalized relations/owl/bfo-temporalized-relations.ttl	
@@ -10,8 +10,8 @@
 @prefix skos: <http://www.w3.org/2004/02/skos/core#> .
 @base <http://purl.obolibrary.org/obo/bfo-temporalized-relations.owl> .
 
-<http://purl.obolibrary.org/obo/bfo-temporalized-relations.owl> rdf:type owl:Ontology ;
-                                                                 owl:versionIRI <http://purl.obolibrary.org/obo/bfo/2020/bfo-temporalized-relations.owl> ;
+<http://purl.obolibrary.org/obo/bfo.owl> rdf:type owl:Ontology ;
+                                                                 owl:versionIRI <http://purl.obolibrary.org/obo/bfo/2020/bfo.owl> ;
                                                                  dc11:contributor "Alan Ruttenberg" ,
                                                                                   "Albert Goldfain" ,
                                                                                   "Barry Smith" ,