diff --git a/DMO-core-SYNOP.ttl b/DMO-core-SYNOP.ttl
index b6948bce4e3bd6f7d7b96b6c5e9a5d6e5d16a2f0..e0dc9fb7768e30b68eab323930f9ad16d5f934b6 100644
--- a/DMO-core-SYNOP.ttl
+++ b/DMO-core-SYNOP.ttl
@@ -24,7 +24,7 @@
 @prefix timePeriod: <http://publications.europa.eu/resource/authority/timeperiod/> .
 @base <https://www.irit.fr/recherches/MELODI/ontologies/DMO/dmo-c-synop> .
 
-<hhttps://www.irit.fr/recherches/MELODI/ontologies/DMO/dmo-c-synop> rdf:type owl:Ontology ;
+<https://www.irit.fr/recherches/MELODI/ontologies/DMO/dmo-c-synop> rdf:type owl:Ontology ;
                         owl:imports <http://qudt.org/1.1/schema/qudt> , <http://qudt.org/1.1/vocab/unit> ,  <http://www.w3.org/2006/time#2016> ,  <http://www.w3.org/ns/sosa/> , <https://w3id.org/dmo-c> ,  <http://www.w3.org/2006/vcard/ns> ;
                       <http://purl.org/dc/terms/contributor> "Bao Long Nguyen" ;
                       <http://purl.org/dc/terms/created> "2022-06-01" ;