diff --git a/validator/profile-with-R5-extension.xml b/validator/profile-with-R5-extension.xml
new file mode 100644
index 00000000..ef1b050b
--- /dev/null
+++ b/validator/profile-with-R5-extension.xml
@@ -0,0 +1,92 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<Observation xmlns="http://hl7.org/fhir" xmlns:v3="urn:hl7-org:v3">
+    <id value="34f254c0-3f0f-47c7-85de-d95a42ebe08e" />
+    <meta>
+        <profile
+            value="http://hl7.eu/fhir/laboratory/StructureDefinition/Observation-resultslab-eu-lab" />
+    </meta>
+    <extension url="http://hl7.org/fhir/StructureDefinition/workflow-supportingInfo">
+        <valueReference>
+            <reference value="urn:uuid:96903deb-b9c6-4227-9137-856b357fe1f5" />
+            <type value="Observation" />
+        </valueReference>
+    </extension>
+    <identifier>
+        <system value="urn:oid:1.2.40.0.34.99.4613.122082.1.3.5" />
+        <value value="OBS-7-3" />
+    </identifier>
+    <status value="preliminary" />
+    <category>
+        <coding>
+            <system value="http://terminology.hl7.org/CodeSystem/observation-category" />
+            <code value="laboratory" />
+        </coding>
+    </category>
+    <code>
+        <coding>
+            <system value="http://loinc.org" />
+            <code value="6020-2" />
+        </coding>
+    </code>
+    <subject>
+        <reference value="urn:uuid:895bc060-f02f-4e75-a566-e6d5507911fb" />
+    </subject>
+    <effectiveDateTime value="2021-06-01T13:01:00+02:00" />
+    <issued value="2021-06-01T13:01:00+02:00" />
+    <performer>
+        <reference value="urn:uuid:71f52882-b159-42af-8a9e-845e66f7feab" />
+        <type value="PractitionerRole" />
+    </performer>
+    <performer>
+        <extension url="http://hl7.org/fhir/StructureDefinition/event-performerFunction">
+            <valueCodeableConcept>
+                <coding>
+                    <system value="http://terminology.hl7.org/CodeSystem/v3-ParticipationType" />
+                    <code value="AUTHEN" />
+                </coding>
+            </valueCodeableConcept>
+        </extension>
+        <reference value="urn:uuid:043046d7-cadb-4315-a8d4-5e0e35876346" />
+        <type value="Practitioner" />
+    </performer>
+    <dataAbsentReason>
+        <coding>
+            <system value="http://terminology.hl7.org/CodeSystem/data-absent-reason" />
+            <code value="temp-unknown" />
+        </coding>
+        <coding>
+            <system value="http://snomed.info/sct" />
+            <code value="255599008" />
+        </coding>
+    </dataAbsentReason>
+    <interpretation>
+        <coding>
+            <system value="https://termgit.elga.gv.at/CodeSystem/rast-klassen" />
+            <code value="RAST3" />
+        </coding>
+        <coding>
+            <system value="http://terminology.hl7.org/CodeSystem/v3-NullFlavor" />
+            <code value="OTH" />
+        </coding>
+    </interpretation>
+    <referenceRange>
+        <low>
+            <value value="0" />
+            <unit value="kU/L" />
+            <system value="http://unitsofmeasure.org" />
+            <code value="kU/L" />
+        </low>
+        <high>
+            <value value="0.35" />
+            <unit value="kU/L" />
+            <system value="http://unitsofmeasure.org" />
+            <code value="kU/L" />
+        </high>
+        <type>
+            <coding>
+                <system value="http://terminology.hl7.org/CodeSystem/referencerange-meaning" />
+                <code value="normal" />
+            </coding>
+        </type>
+    </referenceRange>
+</Observation>
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