<?xml version="1.0" encoding="UTF-8"?><CodeSystem xmlns="http://hl7.org/fhir"><id value="conditional-read-status"/><meta><lastUpdated value="2026-03-16T22:59:53.445+00:00"/></meta><text><status value="generated"/><div xmlns="http://www.w3.org/1999/xhtml"><p class="res-header-id"><b>Generated Narrative: CodeSystem conditional-read-status</b></p><a name="conditional-read-status"> </a><a name="hcconditional-read-status"> </a><p>This case-sensitive code system <code>http://hl7.org/fhir/conditional-read-status</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">not-supported<a name="conditional-read-status-not-supported"> </a></td><td>Not Supported</td><td>No support for conditional reads.</td></tr><tr><td style="white-space:nowrap">modified-since<a name="conditional-read-status-modified-since"> </a></td><td>If-Modified-Since</td><td>Conditional reads are supported, but only with the If-Modified-Since HTTP Header.</td></tr><tr><td style="white-space:nowrap">not-match<a name="conditional-read-status-not-match"> </a></td><td>If-None-Match</td><td>Conditional reads are supported, but only with the If-None-Match HTTP Header.</td></tr><tr><td style="white-space:nowrap">full-support<a name="conditional-read-status-full-support"> </a></td><td>Full Support</td><td>Conditional reads are supported, with both If-Modified-Since and If-None-Match HTTP Headers.</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><extension url="http://hl7.org/fhir/StructureDefinition/structuredefinition-fmm"><valueInteger value="5"/></extension><url value="http://hl7.org/fhir/conditional-read-status"/><identifier><system value="urn:ietf:rfc:3986"/><value value="urn:oid:2.16.840.1.113883.4.642.4.201"/></identifier><identifier><use value="old"/><system value="urn:ietf:rfc:3986"/><value value="urn:oid:2.16.840.1.113883.4.642.1.191"/></identifier><version value="6.0.0-ballot4"/><name value="ConditionalReadStatus"/><title value="Conditional Read Status"/><status value="active"/><experimental value="false"/><date value="2021-01-05T10:01:24+11:00"/><publisher value="HL7 (FHIR Project)"/><contact><telecom><system value="url"/><value value="http://hl7.org/fhir"/></telecom><telecom><system value="email"/><value value="fhir@lists.hl7.org"/></telecom></contact><description value="A code that indicates how the server supports conditional read."/><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/conditional-read-status"/><content value="complete"/><concept><code value="not-supported"/><display value="Not Supported"/><definition value="No support for conditional reads."/></concept><concept><code value="modified-since"/><display value="If-Modified-Since"/><definition value="Conditional reads are supported, but only with the If-Modified-Since HTTP Header."/></concept><concept><code value="not-match"/><display value="If-None-Match"/><definition value="Conditional reads are supported, but only with the If-None-Match HTTP Header."/></concept><concept><code value="full-support"/><display value="Full Support"/><definition value="Conditional reads are supported, with both If-Modified-Since and If-None-Match HTTP Headers."/></concept></CodeSystem>