<?xml version="1.0" encoding="UTF-8"?><CodeSystem xmlns="http://hl7.org/fhir"><id value="constraint-severity"/><meta><lastUpdated value="2026-03-31T18:55:04.283+00:00"/></meta><text><status value="generated"/><div xmlns="http://www.w3.org/1999/xhtml"><p class="res-header-id"><b>Generated Narrative: CodeSystem constraint-severity</b></p><a name="constraint-severity"> </a><a name="hcconstraint-severity"> </a><p>This case-sensitive code system <code>http://hl7.org/fhir/constraint-severity</code> defines the following codes:</p><table class="codes"><tr><td style="white-space:nowrap"><b>Code</b></td><td><b>Display</b></td><td><b>Definition</b></td></tr><tr><td style="white-space:nowrap">error<a name="constraint-severity-error"> </a></td><td>Error</td><td>If the constraint is violated, the resource is not conformant.</td></tr><tr><td style="white-space:nowrap">warning<a name="constraint-severity-warning"> </a></td><td>Warning</td><td>If the constraint is violated, the resource is conformant, but it is not necessarily following best practice.</td></tr></table></div></text><extension url="http://hl7.org/fhir/StructureDefinition/structuredefinition-wg"><valueCode value="fhir"/></extension><extension url="http://hl7.org/fhir/StructureDefinition/structuredefinition-standards-status"><valueCode value="normative"/></extension><url value="http://hl7.org/fhir/constraint-severity"/><identifier><system value="urn:ietf:rfc:3986"/><value value="urn:oid:2.16.840.1.113883.4.642.1.82"/></identifier><version value="6.0.0-ballot4"/><name value="ConstraintSeverity"/><title value="ConstraintSeverity"/><status value="active"/><experimental value="false"/><date value="2026-03-31T18:55:04+00:00"/><publisher value="HL7 International / FHIR Infrastructure"/><contact><telecom><system value="url"/><value value="http://hl7.org/fhir"/></telecom><telecom><system value="email"/><value value="fhir@lists.hl7.org"/></telecom></contact><contact><telecom><system value="url"/><value value="http://www.hl7.org/Special/committees/fiwg"/></telecom></contact><description value="SHALL applications comply with this constraint?"/><jurisdiction><coding><system value="http://unstats.un.org/unsd/methods/m49/m49.htm"/><code value="001"/><display value="World"/></coding></jurisdiction><caseSensitive value="true"/><valueSet value="http://hl7.org/fhir/ValueSet/constraint-severity"/><content value="complete"/><concept><code value="error"/><display value="Error"/><definition value="If the constraint is violated, the resource is not conformant."/></concept><concept><code value="warning"/><display value="Warning"/><definition value="If the constraint is violated, the resource is conformant, but it is not necessarily following best practice."/></concept></CodeSystem>