diff --git a/data/SSC-01/SSC-01-01/SSC-01-01.owl.nt b/data/SSC-01/SSC-01-01/SSC-01-01.owl.nt
index 5386cbce4fba2e80ffb7b1f48854e28a3f02b0cd..8e316c70984e7ef29e6f7e82bba04bcdbb3e0eab 100644
--- a/data/SSC-01/SSC-01-01/SSC-01-01.owl.nt
+++ b/data/SSC-01/SSC-01-01/SSC-01-01.owl.nt
@@ -1,19 +1,29 @@
-solar-system is-a class.
-system is-a class.
-planet-system is-a class.
-sun is-a class.
-object-orbit-sun is-a class.
-object-orbit-sun-direct is-a class.
-object-orbit-sun-no-direct is-a class.
-gravitation is-a class.
+@base <https://tetras-libre.fr/mars/ssc.rdfs> .
 
-bind is-a property.
-orit is-a property.
+@prefix rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#> .
+@prefix rdfs: <http://www.w3.org/2000/01/rdf-schema#> .
 
-planet-system subClass-Of system.
-solar-system subClass-Of planet-system.
-solar-system has-part sun.
-solar-system has-part object-orbit-sun.
-solar-system bind gravitation.
-object-orbit-sun-direct subClass-Of object-orbit-sun.
-object-orbit-sun-no-direct subClass-Of object-orbit-sun.
+<solar-system> a rdfs:Class.
+<system> a rdfs:Class.
+<planet-system> a rdfs:Class.
+<sun> a rdfs:Class.
+<object> a rdfs:Class.
+<object-orbit-sun> a rdfs:Class.
+<object-orbit-sun-direct> a rdfs:Class.
+<object-orbit-sun-no-direct> a rdfs:Class.
+<gravitation> a rdfs:Class.
+
+<bind> a rdf:Property.
+<orbit> a rdf:Property.
+
+<planet-system> rdfs:subClassOf <system>.
+<solar-system> rdfs:subClassOf <planet-system>.
+<object-orbit-sun> rdfs:subClassOf <object>.
+<object-orbit-sun-direct> rdfs:subClassOf <object-orbit-sun>.
+<object-orbit-sun-no-direct> rdfs:subClassOf <object-orbit-sun>.
+
+<solar-system> has-part <sun>.
+<solar-system> has-part <object-orbit-sun>.
+
+<solar-system> <bind> <gravitation>.
+<object-orbit-sun> <orbit> <sun>.