diff --git a/.binder/environment.yml b/.binder/environment.yml
index 42d4747..61dc0e9 100644
--- a/.binder/environment.yml
+++ b/.binder/environment.yml
@@ -6,6 +6,10 @@ dependencies:
 - owlready2 =0.47
 - pandas =2.2.3
 - pint =0.24.4
+- semantikon =0.0.9
+- pyiron_workflow =0.11.2
+- rdflib =7.1.1
+- owlrl =7.1.2
 - pyiron_atomistics =0.6.19
-- pyiron-data =0.0.29
+- pyiron-data =0.0.30
 - lammps =2024.02.07=*_openmpi_*
diff --git a/.ci_support/environment.yml b/.ci_support/environment.yml
index ef41085..c23037e 100644
--- a/.ci_support/environment.yml
+++ b/.ci_support/environment.yml
@@ -5,4 +5,8 @@ dependencies:
 - openjdk
 - owlready2 =0.47
 - pandas =2.2.3
-- pint =0.24.4
\ No newline at end of file
+- pint =0.24.4
+- semantikon =0.0.9
+- pyiron_workflow =0.11.2
+- rdflib =7.1.1
+- owlrl =7.1.2
diff --git a/.ci_support/lower_bound.yml b/.ci_support/lower_bound.yml
index 1704139..db342dd 100644
--- a/.ci_support/lower_bound.yml
+++ b/.ci_support/lower_bound.yml
@@ -4,7 +4,11 @@ dependencies:
 - numpy =1.26.3
 - openjdk
 - owlready2 =0.46
-- pandas =2.1.4
-- pint =0.23
-- pyiron_atomistics =0.5.0
-- pyiron-data =0.0.26
\ No newline at end of file
+- pandas =2.2.0
+- pint =0.24
+- pyiron_atomistics =0.6.19
+- pyiron-data =0.0.26
+- semantikon =0.0.9
+- pyiron_workflow =0.11.0
+- rdflib =7.1.1
+- owlrl =7.1.2
diff --git a/.github/workflows/push-pull.yml b/.github/workflows/push-pull.yml
index 55368fc..63fac5f 100644
--- a/.github/workflows/push-pull.yml
+++ b/.github/workflows/push-pull.yml
@@ -12,7 +12,8 @@ jobs:
     uses: pyiron/actions/.github/workflows/push-pull.yml@actions-3.3.3
     secrets: inherit
     with:
+      python-version-alt3: 'exclude'  # No python 3.9
       docs-env-files: .ci_support/environment.yml .ci_support/environment-docs.yml
       notebooks-env-files: .ci_support/environment.yml .ci_support/environment-pyiron_atomistics.yml .ci_support/environment-lammps.yml
       tests-env-files: .ci_support/environment.yml .ci_support/environment-pyiron_atomistics.yml
-      alternate-tests-env-files: .ci_support/lower_bound.yml
\ No newline at end of file
+      alternate-tests-env-files: .ci_support/lower_bound.yml
diff --git a/docs/environment.yml b/docs/environment.yml
index c507644..5a59693 100644
--- a/docs/environment.yml
+++ b/docs/environment.yml
@@ -12,4 +12,8 @@ dependencies:
 - owlready2 =0.47
 - pandas =2.2.3
 - pint =0.24.4
+- semantikon =0.0.9
+- pyiron_workflow =0.11.2
+- rdflib =7.1.1
+- owlrl =7.1.2
 - sphinxcontrib-mermaid
diff --git a/pyiron_ontology/parser.py b/pyiron_ontology/parser.py
new file mode 100644
index 0000000..1bb54fc
--- /dev/null
+++ b/pyiron_ontology/parser.py
@@ -0,0 +1,168 @@
+from semantikon.converter import parse_input_args, parse_output_args
+from rdflib import Graph, Literal, RDF, RDFS, URIRef, OWL
+from pyiron_workflow import NOT_DATA
+
+
+def get_source_output(var):
+    if not var.connected:
+        return None
+    connection = var.connections[0]
+    return f"{connection.owner.label}.outputs.{connection.label}"
+
+
+def get_inputs_and_outputs(node):
+    """
+    Read input and output arguments with their type hints and return a
+    dictionary containing all input output information
+
+    Args:
+        node (pyiron_workflow.nodes.Node): node to be parsed
+
+    Returns:
+        (dict): dictionary containing input output args, type hints, values
+            and variable names
+    """
+    inputs = parse_input_args(node.node_function)
+    outputs = parse_output_args(node.node_function)
+    if isinstance(outputs, dict):
+        outputs = (outputs,)
+    elif outputs is None:
+        outputs = len(node.outputs.labels) * ({},)
+    outputs = {key: out for key, out in zip(node.outputs.labels, outputs)}
+    for key, value in node.inputs.items():
+        if inputs[key] is None:
+            inputs[key] = {}
+        inputs[key]["value"] = value.value
+        inputs[key]["var_name"] = key
+        inputs[key]["connection"] = get_source_output(value)
+    for key, value in node.outputs.to_value_dict().items():
+        outputs[key]["value"] = value
+        outputs[key]["var_name"] = key
+    return {
+        "inputs": inputs,
+        "outputs": outputs,
+        "function": node.node_function.__name__,
+        "label": node.label,
+    }
+
+
+def get_triples(
+    data,
+    EX,
+    hasSourceFunction=None,
+    hasUnits=None,
+    inheritsPropertiesFrom=None,
+    update_query=True,
+):
+    if hasSourceFunction is None:
+        hasSourceFunction = EX.hasSourceFunction
+    if hasUnits is None:
+        hasUnits = EX.hasUnits
+    if inheritsPropertiesFrom is None:
+        inheritsPropertiesFrom = EX.inheritsPropertiesFrom
+    graph = Graph()
+    label_def_triple = (EX[data["label"]], RDF.type, OWL.NamedIndividual)
+    # Triple already exists
+    if len(list(graph.triples(label_def_triple))) > 0:
+        return graph
+    graph.add(label_def_triple)
+    graph.add((EX[data["label"]], hasSourceFunction, EX[data["function"]]))
+    for io_ in ["inputs", "outputs"]:
+        for key, d in data[io_].items():
+            full_key = data["label"] + f".{io_}." + key
+            label = EX[full_key]
+            graph.add((label, RDFS.label, Literal(full_key)))
+            if d.get("uri", None) is not None:
+                graph.add((label, RDF.type, d["uri"]))
+            if d.get("value", NOT_DATA) is not NOT_DATA:
+                graph.add((label, RDF.value, Literal(d["value"])))
+            graph.add((label, EX[io_[:-1] + "Of"], EX[data["label"]]))
+            if d.get("units", None) is not None:
+                graph.add((label, hasUnits, EX[d["units"]]))
+            if d.get("connection", None) is not None:
+                graph.add((label, inheritsPropertiesFrom, EX[d["connection"]]))
+            for t in _get_triples_from_restrictions(d, EX):
+                graph.add(_parse_triple(t, EX, label=label, data=data))
+    if update_query:
+        inherit_properties(graph, EX)
+    return graph
+
+
+def _get_triples_from_restrictions(data, EX):
+    triples = []
+    if data.get("restriction", None) is not None:
+        triples = restriction_to_triple(data["restriction"])
+    if data.get("triple", None) is not None:
+        if isinstance(data["triple"][0], tuple | list):
+            triples.extend(list(data["triple"]))
+        else:
+            triples.extend([data["triple"]])
+    return triples
+
+
+def restriction_to_triple(restriction):
+    triples = []
+    assert isinstance(restriction, tuple) and isinstance(restriction[0], tuple)
+    if not isinstance(restriction[0][0], tuple):
+        restriction = (restriction,)
+    for r in restriction:
+        assert len(r[0]) == 2
+        label = r[0][1] + "Restriction"
+        triples.append((label, RDF.type, OWL.Restriction))
+        for rr in r:
+            triples.append((label, rr[0], rr[1]))
+        triples.append((RDF.type, label))
+    return triples
+
+
+def _parse_triple(triple, EX, label=None, data=None):
+    if len(triple) == 2:
+        subj, pred, obj = label, triple[0], triple[1]
+    elif len(triple) == 3:
+        subj, pred, obj = triple
+    else:
+        raise ValueError("Triple must have 2 or 3 elements")
+    if obj.startswith("inputs.") or obj.startswith("outputs."):
+        obj = data["label"] + "." + obj
+    if not isinstance(obj, URIRef):
+        obj = EX[obj]
+    return subj, pred, obj
+
+
+def inherit_properties(graph, NS, n=None):
+    update_query = (
+        f"PREFIX ns: <{NS}>",
+        f"PREFIX rdfs: <{RDFS}>",
+        f"PREFIX rdf: <{RDF}>",
+        "",
+        "INSERT {",
+        "    ?subject ?p ?o .",
+        "}",
+        "WHERE {",
+        "    ?subject ns:inheritsPropertiesFrom ?target .",
+        "    ?target ?p ?o .",
+        "    FILTER(?p != ns:inheritsPropertiesFrom)",
+        "    FILTER(?p != rdfs:label)",
+        "    FILTER(?p != rdf:value)",
+        "    FILTER(?p != rdf:type)",
+        "}",
+    )
+    if n is None:
+        n = len(list(graph.triples((None, NS.inheritsPropertiesFrom, None))))
+    for _ in range(n):
+        graph.update("\n".join(update_query))
+
+
+def validate_values(graph):
+    missing_triples = []
+    for restriction in graph.subjects(RDF.type, OWL.Restriction):
+        on_property = graph.value(restriction, OWL.onProperty)
+        some_values_from = graph.value(restriction, OWL.someValuesFrom)
+        if on_property and some_values_from:
+            for cls in graph.subjects(OWL.equivalentClass, restriction):
+                for instance in graph.subjects(RDF.type, cls):
+                    if not (instance, on_property, some_values_from) in graph:
+                        missing_triples.append(
+                            (instance, on_property, some_values_from)
+                        )
+    return missing_triples
diff --git a/tests/unit/test_parser.py b/tests/unit/test_parser.py
new file mode 100644
index 0000000..c8c70ff
--- /dev/null
+++ b/tests/unit/test_parser.py
@@ -0,0 +1,126 @@
+import unittest
+from owlrl import DeductiveClosure, OWLRL_Semantics
+from rdflib import Graph, OWL, RDF
+from pyiron_ontology.parser import get_inputs_and_outputs, get_triples, inherit_properties, validate_values
+from pyiron_workflow import Workflow
+from semantikon.typing import u
+from rdflib import Namespace
+
+
+EX = Namespace("http://example.org/")
+
+
+@Workflow.wrap.as_function_node("speed")
+def calculate_speed(
+    distance: u(float, units="meter") = 10.0,
+    time: u(float, units="second") = 2.0,
+) -> u(
+    float,
+    units="meter/second",
+    triple=(
+        (EX.isOutputOf, "inputs.time"),
+        (EX.subject, EX.predicate, EX.object)
+    )
+):
+    return distance / time
+
+
+@Workflow.wrap.as_function_node("result")
+def add(a: float, b: float) -> u(float, triple=(EX.HasOperation, EX.Addition)):
+    return a + b
+
+
+@Workflow.wrap.as_function_node("result")
+def multiply(a: float, b: float) -> u(
+    float,
+    triple=(
+        (EX.HasOperation, EX.Multiplication),
+        (EX.inheritsPropertiesFrom, "inputs.a")
+    )
+):
+    return a * b
+
+
+@Workflow.wrap.as_function_node("result")
+def correct_analysis(
+    a: u(
+        float,
+        restriction=(
+            (OWL.onProperty, EX.HasOperation),
+            (OWL.someValuesFrom, EX.Addition)
+        )
+    )
+) -> float:
+    return a
+
+
+@Workflow.wrap.as_function_node("result")
+def wrong_analysis(
+    a: u(
+        float,
+        restriction=(
+            (OWL.onProperty, EX.HasOperation),
+            (OWL.someValuesFrom, EX.Division)
+        )
+    )
+) -> float:
+    return a
+
+
+class TestParser(unittest.TestCase):
+    def test_parser(self):
+        c = calculate_speed()
+        output_dict = get_inputs_and_outputs(c)
+        for label in ["inputs", "outputs", "function", "label"]:
+            self.assertIn(label, output_dict)
+
+    def test_triples(self):
+        speed = calculate_speed()
+        data = get_inputs_and_outputs(speed)
+        graph = get_triples(data, EX)
+        self.assertGreater(
+            len(list(graph.triples((None, EX.hasUnits, EX["meter/second"])))), 0
+        )
+        self.assertEqual(
+            len(
+                list(
+                    graph.triples(
+                        (None, EX.isOutputOf, EX["calculate_speed.inputs.time"])
+                    )
+                )
+            ),
+            1
+        )
+        self.assertEqual(
+            len(list(graph.triples((EX.subject, EX.predicate, EX.object)))),
+            1
+        )
+
+    def test_correct_analysis(self):
+        def get_graph(wf):
+            graph = Graph()
+            graph.add((EX.HasOperation, RDF.type, RDF.Property))
+            graph.add((EX.Addition, RDF.type, OWL.Class))
+            graph.add((EX.Multiplication, RDF.type, OWL.Class))
+            for value in wf.children.values():
+                data = get_inputs_and_outputs(value)
+                graph += get_triples(data, EX)
+            inherit_properties(graph, EX)
+            DeductiveClosure(OWLRL_Semantics).expand(graph)
+            return graph
+        wf = Workflow("correct_analysis")
+        wf.addition = add(a=1., b=2.)
+        wf.multiply = multiply(a=wf.addition, b=3.)
+        wf.analysis = correct_analysis(a=wf.multiply)
+        graph = get_graph(wf)
+        self.assertEqual(len(validate_values(graph)), 0)
+        wf = Workflow("wrong_analysis")
+        wf.addition = add(a=1., b=2.)
+        wf.multiply = multiply(a=wf.addition, b=3.)
+        wf.analysis = wrong_analysis(a=wf.multiply)
+        graph = get_graph(wf)
+        self.assertEqual(len(validate_values(graph)), 1)
+
+
+if __name__ == "__main__":
+    unittest.main()