diff --git a/README.md b/README.md
index b487bcc..704d750 100644
--- a/README.md
+++ b/README.md
@@ -48,8 +48,8 @@ python3 main.py some/where/.../model some/where/else/.../output_dir
 - [x] generate mkdocs input
 - [x] generate JSON dump
 - [x] generate diagrams
-- [ ] generate RDF ontology
-- [ ] generate JSON-LD context
+- [x] generate RDF ontology
+- [x] generate JSON-LD context
 
 
 ## Contributing
diff --git a/spec_parser/model.py b/spec_parser/model.py
index f7d9766..1e3b00d 100644
--- a/spec_parser/model.py
+++ b/spec_parser/model.py
@@ -84,10 +84,6 @@ def load(self, dir):
                     self.datatypes[k] = n
                     ns.datatypes[k] = n
 
-        # processing
-        # TODO
-        # add links from properties to classes using them
-        # add inherited properties to classes
         self.types = self.classes | self.vocabularies | self.datatypes
 
         logging.info(f"Loaded {len(self.namespaces)} namespaces, {len(self.classes)} classes, {len(self.properties)} properties, {len(self.vocabularies)} vocabularies, {len(self.individuals)} individuals, {len(self.datatypes)} datatypes")
diff --git a/spec_parser/rdf.py b/spec_parser/rdf.py
index 8f7b992..5f5d00e 100644
--- a/spec_parser/rdf.py
+++ b/spec_parser/rdf.py
@@ -2,11 +2,142 @@
 
 # SPDX-License-Identifier: Apache-2.0
 
-import rdflib
+import json
+import logging
+from pathlib import Path
+
+from rdflib import (
+    BNode,
+    Graph,
+    Literal,
+    Namespace,
+    URIRef,
+)
+from rdflib.namespace import (
+    OWL, RDF, RDFS, SH, XSD,
+)
+from rdflib.tools.rdf2dot import (
+    rdf2dot
+)
+
+
+URI_BASE = 'https://rdf.spdx.org/v3/'
 
 def gen_rdf(model, dir, cfg):
-    pass
+    p = Path(dir)
+    p.mkdir(exist_ok=True)
+
+    ret = gen_rdf_ontology(model)
+    for ext in ["xml", "ttl", "pretty-xml", "json-ld"]:
+        f = p / ("ontology.rdf." + ext)
+        ret.serialize(f, format=ext, encoding="utf-8")
+    fn = p / "ontology.rdf.dot"
+    with open(fn, "w") as f:
+        rdf2dot(ret, f)
+    ctx = jsonld_context(ret)
+    fn = p / "context.jsonld"
+    with open(fn, "w") as f:
+        json.dump(ctx, f, sort_keys=True, indent=2)
+
+
+
+def gen_rdf_ontology(model):
+    g = Graph()
+    g.bind("spdx", Namespace(URI_BASE))
+    g.bind("xsd", XSD)
+
+    node = URIRef(URI_BASE)
+    g.add((node, RDF.type, OWL.Ontology))
+    g.add((node, OWL.versionIRI, node))
+
+    for fqname, c in model.classes.items():
+        node = URIRef(c.iri)
+        g.add((node, RDF.type, RDFS.Class))
+        g.add((node, RDF.type, OWL.Class))
+        if c.summary:
+            g.add((node, RDFS.comment, Literal(c.summary, lang='en')))
+        parent = c.metadata.get("SubclassOf")
+        if parent:
+            pns = "" if parent.startswith("/") else f"/{c.ns.name}/"
+            p = model.classes[pns+parent]            
+            g.add((node, RDFS.subClassOf, URIRef(p.iri)))
+        if c.properties:
+            g.add((node, RDF.type, SH.NodeShape))
+            for p in c.properties:
+                bnode = BNode()
+                g.add((node, SH.property, bnode))
+                fqprop = c.properties[p]["fqname"]
+                g.add((bnode, SH.path, URIRef(model.properties[fqprop].iri)))
+                mincount = c.properties[p]["minCount"]
+                if int(mincount) != 0:
+                    g.add((bnode, SH.minCount, Literal(int(mincount))))
+                maxcount = c.properties[p]["maxCount"]
+                if maxcount != '*':
+                    g.add((bnode, SH.maxCount, Literal(int(maxcount))))
+
+
+    for fqname, p in model.properties.items():
+        node = URIRef(p.iri)
+        g.add((node, RDF.type, RDF.Property))
+        if p.summary:
+            g.add((node, RDFS.comment, Literal(p.summary, lang='en')))
+        if p.metadata["Nature"] == "ObjectProperty":
+            g.add((node, RDF.type, OWL.ObjectProperty))
+#             g.add((node, RDFS.domain, xxx))
+        elif p.metadata["Nature"] == "DataProperty":
+            g.add((node, RDF.type, OWL.DatatypeProperty))
+        rng = p.metadata["Range"]
+        if ':' in rng:
+            if rng.startswith('xsd:'):
+                t = URIRef("http://www.w3.org/2001/XMLSchema#"+rng[4:])
+                g.add((node, RDFS.range, t))
+            else:
+                logging.warn(f'Uknown namespace in range <{rng}> of property {p.name}')
+        else:
+            typename = "" if rng.startswith("/") else f"/{p.ns.name}/"
+            typename += rng
+            dt = model.types[typename]
+            g.add((node, RDFS.range, URIRef(dt.iri)))
+            
+    for fqname, v in model.vocabularies.items():
+        node = URIRef(v.iri)
+        g.add((node, RDF.type, RDFS.Class))
+        g.add((node, RDF.type, OWL.Class))
+        if v.summary:
+            g.add((node, RDFS.comment, Literal(v.summary, lang='en')))
+        for e, d in v.entries.items():
+            enode = URIRef(v.iri + '/' + e)
+            g.add((enode, RDF.type, OWL.NamedIndividual))
+            g.add((enode, RDF.type, node))
+            g.add((enode, RDFS.label, Literal(e)))
+            g.add((enode, RDFS.comment, Literal(d, lang='en')))
+
+    for fqname, i in model.individuals.items():
+        node = URIRef(i.iri)
+        g.add((node, RDF.type, OWL.NamedIndividual))
+        if i.summary:
+            g.add((node, RDFS.comment, Literal(i.summary, lang='en')))
+        typ = i.metadata["type"]
+        typename = "" if typ.startswith("/") else f"/{i.ns.name}/"
+        typename += typ
+        dt = model.types[typename]
+        g.add((node, RDFS.range, URIRef(dt.iri)))
+        custom_iri = i.metadata.get("IRI")
+        if custom_iri:
+            g.add((node, OWL.sameAs, URIRef(custom_iri)))
+
+    return g
+
+
 
-# TODO :-D
-def gen_rdf_ontology(): pass
-def gen_jsonld_context(): pass
\ No newline at end of file
+def jsonld_context(g):
+    terms = dict()
+    terms['spdx'] = URI_BASE
+    for s in g.subjects(unique=True):
+        s = str(s)
+        if s.startswith(URI_BASE):
+            short = s[len(URI_BASE):]
+            if short:
+                terms[short] = 'spdx:' + short
+    return terms
+#     return {'@context': terms}