feat(owl2yams): Raise ValueError if relation already defined

owl2yams/__init__.py

@@ -133,6 +133,8 @@
         if object_property_uri_fragment is None:
             print(f"Warning: object property {object_property_uri} could not be parsed")
             continue
+        if object_property_uri_fragment in schema:
+            raise ValueError(f"Error: relation {object_property_uri} already defined")
         schema.add_relation_type(RelationType(object_property_uri_fragment))
         all_types = list(ETYPE_URI.keys())
         domain_fragments = yams_domain_from_urirefs(

test/data/test_multi_attribute.owl → test/data/test_multi_relation.owl

@@ -2,5 +2,5 @@
 @prefix loutre2: <http://loutre2.fr/>.
 @prefix owl: <http://www.w3.org/2002/07/owl#>.
 
-loutre:toto a owl:DatatypeProperty.
-loutre2:toto a owl:DatatypeProperty.
+loutre:toto a owl:ObjectProperty.
+loutre2:toto a owl:ObjectProperty.

test/test_owl2yams.py

@@ -45,6 +45,10 @@
         with self.assertRaises(ValueError):
             self._load_owl_and_yams("test_multi_attribute.owl")
 
+    def test_raise_multi_relation(self):
+        with self.assertRaises(ValueError):
+            self._load_owl_and_yams("test_multi_relation.owl")
+
 
 if __name__ == "__main__":
     unittest.main()