<status value="draft" /> <date value="2026-01-09" /> <publisher value="HL7 Canada - FHIR Implementation Work Group" /> <contact> <telecom> <system value="url" /> <value value="https://infocentral.infoway-inforoute.ca/en/collaboration/wg/fhir-implementations" /> </telecom> </contact> <description value="Proposed constraints on the Observation Resource for general use. This profile sets minimum expectations for the Observation resource to represent various observations if no other, more specific profile is applicable. An observation is a measurement or assertion about a subject (person, group, device, location, or another subject)." /> <jurisdiction> <coding> <system value="urn:iso:std:iso:3166" /> <code value="CA" /> </coding> </jurisdiction> <fhirVersion value="4.0.1" /> <mapping> <identity value="workflow" /> <uri value="http://hl7.org/fhir/workflow" /> <name value="Workflow Pattern" /> </mapping> <mapping> <identity value="sct-concept" /> <uri value="http://snomed.info/conceptdomain" /> <name value="SNOMED CT Concept Domain Binding" /> </mapping> <mapping> <identity value="v2" /> <uri value="http://hl7.org/v2" /> <name value="HL7 v2 Mapping" /> </mapping> <mapping> <identity value="rim" /> <uri value="http://hl7.org/v3" /> <name value="RIM Mapping" /> </mapping> <mapping> <identity value="w5" /> <uri value="http://hl7.org/fhir/fivews" /> <name value="FiveWs Pattern Mapping" /> </mapping> <mapping> <identity value="sct-attr" /> <uri value="http://snomed.org/attributebinding" /> <name value="SNOMED CT Attribute Binding" /> </mapping> <kind value="resource" /> <abstract value="false" /> <type value="Observation" /> <baseDefinition value="http://hl7.org/fhir/StructureDefinition/Observation" /> <derivation value="constraint" /> <differential> <element id="Observation"> <path value="Observation" /> <short value="Observation Profile" /> <definition value="The Observation Profile is based upon the core FHIR Observation Resource" /> </element> <element id="Observation.status"> <path value="Observation.status" /> </element> <element id="Observation.code"> <path value="Observation.code" /> <comment value="The binding strength of this element is [Preferred](https://www.hl7.org/fhir/terminologies.html#strength), meaning that codes are encouraged to draw from the LOINC code system for interoperability purposes but are not required to do so to be considered conformant. *All* code-value and, if present, component.code-component.value pairs need to be taken into account to correctly understand the meaning of the observation." /> <binding> <strength value="preferred" /> <description value="LOINC codes identifying names of simple observations." /> <valueSet value="http://hl7.org/fhir/ValueSet/observation-codes" /> </binding> </element> <element id="Observation.subject"> <path value="Observation.subject" /> <min value="1" /> <type> <code value="Reference" /> <targetProfile value="http://hl7.org/fhir/ca/baseline/StructureDefinition/profile-patient" /> <targetProfile value="http://hl7.org/fhir/StructureDefinition/Group" /> <targetProfile value="http://hl7.org/fhir/StructureDefinition/Device" /> <targetProfile value="http://hl7.org/fhir/StructureDefinition/Location" /> </type> </element> <element id="Observation.effective[x]"> <path value="Observation.effective[x]" /> <type> <code value="dateTime" /> </type> <type> <code value="Period" /> </type> </element> <element id="Observation.dataAbsentReason"> <path value="Observation.dataAbsentReason" /> <comment value="This element is recommended for support and was initially flagged as must support but was later determined to be too strong for some types of observation profiles that want to derive from the CA Baseline but do not need a dataAbsentReason concept" /> </element> <element id="Observation.component"> <path value="Observation.component" /> <comment value="Some elements underneath this backbone element are considered must support. This does not incur the expectation to support these elements for any implementers that do not need to support the parent concept of observation.component. This may need to be evaluated in the future as impelementations seek to derive directly from the CA Baseline profiles" /> </element> <element id="Observation.component.code"> <path value="Observation.component.code" /> <comment value="The binding strength of this element is [Preferred](https://www.hl7.org/fhir/terminologies.html#strength), meaning that codes are encouraged to draw from the LOINC code system for interoperability purposes but are not required to do so to be considered conformant. *All* code-value and, if present, component.code-component.value pairs need to be taken into account to correctly understand the meaning of the observation." /> <binding> <strength value="preferred" /> <description value="LOINC codes identifying names of simple observations." /> <valueSet value="http://hl7.org/fhir/ValueSet/observation-codes" /> </binding> </element> </differential> </StructureDefinition>