<?xml version="1.0" encoding="UTF-8"?><CodeSystem xmlns="http://hl7.org/fhir"><id value="synchronicity-control"/><meta><lastUpdated value="2026-04-01T17:59:15.240+00:00"/></meta><text><status value="generated"/><div xmlns="http://www.w3.org/1999/xhtml"><p class="res-header-id"><b>Generated Narrative: CodeSystem synchronicity-control</b></p><a name="synchronicity-control"> </a><a name="hcsynchronicity-control"> </a><p>This case-sensitive code system <code>http://hl7.org/fhir/synchronicity-control</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">synchronous<a name="synchronicity-control-synchronous"> </a></td><td>Synchronous</td><td>This operation is invoked synchronously</td></tr><tr><td style="white-space:nowrap">asynchronous<a name="synchronicity-control-asynchronous"> </a></td><td>Asynchronous</td><td>This operation is invoked asynchronously.</td></tr><tr><td style="white-space:nowrap">either<a name="synchronicity-control-either"> </a></td><td>System</td><td>This operation can be invoked either synchronously or asynchronously.</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/synchronicity-control"/><version value="6.0.0-ballot4"/><name value="OperationSynchronicityControl"/><title value="Operation Synchronicity Control"/><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="Indicates that an operation must always be handled as synchronous or asynchronous, or that the server must provide both, and clients can choose"/><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/synchronicity-control"/><content value="complete"/><concept><code value="synchronous"/><display value="Synchronous"/><definition value="This operation is invoked synchronously"/></concept><concept><code value="asynchronous"/><display value="Asynchronous"/><definition value="This operation is invoked asynchronously."/></concept><concept><code value="either"/><display value="System"/><definition value="This operation can be invoked either synchronously or asynchronously."/></concept></CodeSystem>