diff --git a/spec_parser/model.py b/spec_parser/model.py
index 9194d3d..dac5dd3 100644
--- a/spec_parser/model.py
+++ b/spec_parser/model.py
@@ -154,6 +154,7 @@ class Class:
         "Instantiability",
         "name",
         "SubclassOf",
+        "NodeKind",
     )
     VALID_PROP_METADATA = (
         "maxCount",
diff --git a/spec_parser/rdf.py b/spec_parser/rdf.py
index 15fe4fe..4f52b6f 100644
--- a/spec_parser/rdf.py
+++ b/spec_parser/rdf.py
@@ -68,6 +68,11 @@ def gen_rdf_ontology(model):
             pns = "" if parent.startswith("/") else f"/{c.ns.name}/"
             p = model.classes[pns+parent]
             g.add((node, RDFS.subClassOf, URIRef(p.iri)))
+
+        node_kind = c.metadata.get("NodeKind")
+        if node_kind:
+            g.add((node, SH.nodeKind, getattr(SH, node_kind)))
+
         for p in c.properties:
             fqprop = c.properties[p]["fqname"]
             if fqprop == "/Core/spdxId":