diff --git a/apps/website/public/schema/dg_base.ttl b/apps/website/public/schema/dg_base.ttl
index cdbf659fa..eced8e198 100644
--- a/apps/website/public/schema/dg_base.ttl
+++ b/apps/website/public/schema/dg_base.ttl
@@ -1,16 +1,18 @@
 @prefix rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#> .
 @prefix rdfs: <http://www.w3.org/2000/01/rdf-schema#> .
 @prefix : <http://www.w3.org/2000/01/rdf-schema#> .
-@prefix dc: <http://purl.org/dc/elements/1.1/> .
+@prefix dct: <http://purl.org/dc/terms/> .
 @prefix owl: <http://www.w3.org/2002/07/owl#> .
 @prefix dgb: <https://discoursegraphs.com/schema/dg_base#> .
+@prefix bibo: <http://purl.org/ontology/bibo/> .
+@prefix status: <http://purl.org/ontology/bibo/status/> .
 
-<https://discoursegraphs.com/schema/dg_base#>
-    dc:date "2025-12-22" ;
+<https://discoursegraphs.com/schema/dg_base#> a owl:Ontology;
+    dct:created "2025-12-22" ;
     rdfs:comment "DiscourseGraph foundation vocabulary"@en ;
     rdfs:label "DiscourseGraph foundation vocabulary"@en ;
-    owl:versionInfo "0 (tentative)" ;
-    a owl:Ontology.
+    bibo:status status:draft;
+    owl:versionInfo "0 (tentative)".
 
 # This is inspired by https://hyperknowledge.org/schemas/hyperknowledge_frames.ttl
 # and topic mapping
diff --git a/apps/website/public/schema/dg_core.ttl b/apps/website/public/schema/dg_core.ttl
index 6c0302974..b5410b69f 100644
--- a/apps/website/public/schema/dg_core.ttl
+++ b/apps/website/public/schema/dg_core.ttl
@@ -2,6 +2,7 @@
 @prefix rdfs: <http://www.w3.org/2000/01/rdf-schema#> .
 @prefix : <http://www.w3.org/2000/01/rdf-schema#> .
 @prefix dc: <http://purl.org/dc/elements/1.1/> .
+@prefix dct: <http://purl.org/dc/terms/> .
 @prefix owl: <http://www.w3.org/2002/07/owl#> .
 @prefix vs: <http://www.w3.org/2003/06/sw-vocab-status/ns#> .
 @prefix sioc: <http://rdfs.org/sioc/ns#> .
@@ -9,6 +10,16 @@
 @prefix dgb: <https://discoursegraphs.com/schema/dg_base#> .
 @prefix dg: <https://discoursegraphs.com/schema/dg_core#> .
 @prefix schema: <http://schema.org/> .
+@prefix bibo: <http://purl.org/ontology/bibo/> .
+@prefix status: <http://purl.org/ontology/bibo/status/> .
+
+<https://discoursegraphs.com/schema/dg_core#> a owl:Ontology;
+  dct:created "2025-12-22" ;
+  dct:modified "2026-03-26" ;
+  rdfs:comment "DiscourseGraph core vocabulary"@en ;
+  rdfs:label "DiscourseGraph core vocabulary"@en ;
+  bibo:status status:draft;
+  owl:versionInfo "0.1 (tentative)".
 
 dg:Question a dgb:NodeSchema;
   rdfs:label "Question"@en;