restricted valueQuantity to metric ucum codes only

Author: ryma2fhir

structuredefinitions/UKCore-Observation-VitalSigns-BodyWeight.xml

@@ -58,5 +58,16 @@
       <path value="Observation.value[x].code" />
       <fixedCode value="kg" />
     </element>
+    <element id="Observation.value[x]:valueQuantity">
+      <path value="Observation.value[x]" />
+      <sliceName value="valueQuantity" />
+    </element>
+    <element id="Observation.value[x]:valueQuantity.code">
+      <path value="Observation.value[x].code" />
+      <binding>
+        <strength value="required" />
+        <valueSet value="https://fhir.hl7.org.uk/ValueSet/UKCore-BodyWeightUCUM" />
+      </binding>
+    </element>
   </differential>
 </StructureDefinition>

valuesets/ValueSet-UKCore-BodyWeightMeasurements - Copy.xml

@@ -0,0 +1,32 @@
+<ValueSet xmlns="http://hl7.org/fhir">
+  <id value="UKCore-BodyWeightMeasurements" />
+  <url value="https://fhir.hl7.org.uk/ValueSet/UKCore-BodyWeightUCUM" />
+  <version value="0.1.0" />
+  <name value="UKCoreBodyWeightUCUM" />
+  <title value="UK Core UCUM" />
+  <status value="draft" />
+  <date value="2026-04-07" />
+  <publisher value="HL7 UK" />
+  <contact>
+    <name value="HL7 UK" />
+    <telecom>
+      <system value="email" />
+      <value value="ukcore@hl7.org.uk" />
+      <use value="work" />
+      <rank value="1" />
+    </telecom>
+  </contact>
+  <description value="UCUM metric units for recording Body Weight. This is based on https://hl7.org/fhir/R4/valueset-ucum-bodyweight.html" />
+  <copyright value="Copyright &#169; 2021+ HL7 UK Licensed under the Apache License, Version 2.0 (the &quot;License&quot;); you may not use this file except in compliance with the License. You may obtain a copy of the License at  http://www.apache.org/licenses/LICENSE-2.0 Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an &quot;AS IS&quot; BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License. HL7&#174; FHIR&#174; standard Copyright &#169; 2011+ HL7 The HL7&#174; FHIR&#174; standard is used under the FHIR license. You may obtain a copy of the FHIR license at  https://www.hl7.org/fhir/license.html." />
+  <compose>
+    <include>
+      <system value="http://unitsofmeasure.org"/>
+      <concept>
+        <code value="kg"/>
+      </concept>
+      <concept>
+        <code value="g"/>
+      </concept>
+    </include>
+  </compose>
+</ValueSet>