diff --git a/for_emmo.ttl b/for_emmo.ttl
index 0e9d5d3..ca06fa6 100644
--- a/for_emmo.ttl
+++ b/for_emmo.ttl
@@ -1,4 +1,4 @@
-@prefix : <https://w3id.org/emmo/domain/microstructure/for_emmo#> .
+@prefix : <https://w3id.org/emmo#> .
 @prefix owl: <http://www.w3.org/2002/07/owl#> .
 @prefix rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#> .
 @prefix xml: <http://www.w3.org/XML/1998/namespace> .
@@ -7,7 +7,6 @@
 @prefix rdfs: <http://www.w3.org/2000/01/rdf-schema#> .
 @prefix skos: <http://www.w3.org/2004/02/skos/core#> .
 @prefix dcterms: <http://purl.org/dc/terms/> .
-@base <https://w3id.org/emmo/domain/microstructure/for_emmo#> .
 
 <https://w3id.org/emmo/domain/microstructure/for_emmo> rdf:type owl:Ontology ;
                                                         owl:versionIRI <https://w3id.org/emmo/domain/microstructure/0.3/for_emmo> ;