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-rw-r--r--schema/species.ttl2
1 files changed, 2 insertions, 0 deletions
diff --git a/schema/species.ttl b/schema/species.ttl
index 18d1b38..c66dda0 100644
--- a/schema/species.ttl
+++ b/schema/species.ttl
@@ -5,6 +5,8 @@
 @prefix gn: <http://rdf.genenetwork.org/v1/id/> .
 @prefix gnt: <http://rdf.genenetwork.org/v1/term/> .
 @prefix owl: <http://www.w3.org/2002/07/owl#> .
+@prefix rdfs: <http://www.w3.org/2000/01/rdf-schema#> .
+@prefix skos: <http://www.w3.org/2004/02/skos/core#> .
 @prefix wd: <http://www.wikidata.org/entity/> .