<status value="active" /> <date value="2026-02-25" /> <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="This profile defines the UK constraints and extensions on the International FHIR resource [Observation](https://hl7.org/fhir/R4/Observation.html)." /> <purpose value="This profile allows exchange of information of Measurements and simple assertions made about an individual, device or other subject. Note: this profile SHALL NOT be used where a more specific UK Core profile exists." /> <copyright value="Copyright © 2021+ HL7 UK Licensed under the Apache License, Version 2.0 (the "License"); 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 "AS IS" 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® FHIR® standard Copyright © 2011+ HL7 The HL7® FHIR® standard is used under the FHIR license. You may obtain a copy of the FHIR license at https://www.hl7.org/fhir/license.html." /> <fhirVersion value="4.0.1" /> <kind value="resource" /> <abstract value="false" /> <type value="Observation" /> <baseDefinition value="http://hl7.org/fhir/StructureDefinition/Observation" /> <derivation value="constraint" /> <differential> <element id="Observation.status"> <path value="Observation.status" /> <short value="The status of the result value." /> <mustSupport value="true" /> </element> <element id="Observation.category"> <path value="Observation.category" /> <short value="A code that classifies the general type of observation being made." /> <mustSupport value="true" /> </element> <element id="Observation.code"> <path value="Observation.code" /> <short value="The type of observation (code / type)." /> <mustSupport value="true" /> <binding> <strength value="preferred" /> <description value="A code from the SNOMED Clinical Terminology UK coding system describing a type of observation" /> <valueSet value="https://fhir.hl7.org.uk/ValueSet/UKCore-ObservationType" /> </binding> </element> <element id="Observation.subject"> <path value="Observation.subject" /> <short value="Who and / or what the observation is about." /> <mustSupport value="true" /> </element> <element id="Observation.effective[x]"> <path value="Observation.effective[x]" /> <short value="A clinically relevant time / time-period for observation." /> <mustSupport value="true" /> </element> <element id="Observation.performer"> <path value="Observation.performer" /> <short value="Who is responsible for the observation." /> <mustSupport value="true" /> </element> <element id="Observation.value[x]"> <path value="Observation.value[x]" /> <short value="The actual observed result." /> <mustSupport value="true" /> </element> <element id="Observation.bodySite"> <path value="Observation.bodySite" /> <binding> <strength value="preferred" /> </binding> </element> <element id="Observation.method"> <path value="Observation.method" /> <binding> <strength value="preferred" /> </binding> </element> <element id="Observation.component"> <path value="Observation.component" /> <short value="Component / sub results." /> <mustSupport value="true" /> </element> <element id="Observation.component.code"> <path value="Observation.component.code" /> <binding> <strength value="preferred" /> <description value="A code from the SNOMED Clinical Terminology UK coding system describing a type of observation" /> <valueSet value="https://fhir.hl7.org.uk/ValueSet/UKCore-ObservationType" /> </binding> </element> </differential> </StructureDefinition>