<?xml version="1.0" encoding="UTF-8"?><OperationDefinition xmlns="http://hl7.org/fhir"><id value="Subscription-events"/><text><status value="generated"/><div xmlns="http://www.w3.org/1999/xhtml"><p class="res-header-id"><b>Generated Narrative: OperationDefinition Subscription-events</b></p><a name="Subscription-events"> </a><a name="hcSubscription-events"> </a><p>URL: [base]/Subscription/[id]/$events</p><h3>Parameters</h3><table class="grid"><tr><td><b>Use</b></td><td><b>Name</b></td><td><b>Scope</b></td><td><b>Cardinality</b></td><td><b>Type</b></td><td><b>Binding</b></td><td><b>Documentation</b></td></tr><tr><td>IN</td><td>eventsSinceNumber</td><td/><td>0..1</td><td><a href="datatypes.html#integer64">integer64</a></td><td/><td><div><p>The lowest event number to be included in the response (lower bound, inclusive).</p>
</div></td></tr><tr><td>IN</td><td>eventsUntilNumber</td><td/><td>0..1</td><td><a href="datatypes.html#integer64">integer64</a></td><td/><td><div><p>The highest event number to be included in the response (upper bound, inclusive).</p>
</div></td></tr><tr><td>IN</td><td>content</td><td/><td>0..1</td><td><a href="datatypes.html#code">code</a></td><td><a href="valueset-subscription-payload-content.html">Subscription Payload Content</a> (Required)</td><td><div><p>Requested content style of returned data. Codes from backport-content-value-set (e.g., empty, id-only, full-resource). This is a hint to the server what a client would prefer, and MAY be ignored.</p>
</div></td></tr><tr><td>OUT</td><td>return</td><td/><td>1..1</td><td><a href="bundle.html">Bundle</a></td><td/><td><div><p>The operation returns a valid notification bundle, with the first entry being a SubscriptionStatus resource. The bundle type is &quot;subscription-notification&quot;.</p>
</div></td></tr></table></div></text><extension url="http://hl7.org/fhir/StructureDefinition/structuredefinition-fmm"><valueInteger value="0"/></extension><extension url="http://hl7.org/fhir/StructureDefinition/structuredefinition-standards-status"><valueCode value="normative"/></extension><extension url="http://hl7.org/fhir/StructureDefinition/structuredefinition-wg"><valueCode value="fhir"/></extension><url value="http://hl7.org/fhir/OperationDefinition/Subscription-events"/><version value="6.0.0-ballot4"/><name value="Events"/><title value="Search and retrieve prior events for a Subscription"/><status value="active"/><kind value="operation"/><experimental value="false"/><date value="2026-04-03T20:06:10+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="This operation is used to search for and return notifications that have been previously triggered by a topic-based Subscription."/><jurisdiction><coding><system value="http://unstats.un.org/unsd/methods/m49/m49.htm"/><code value="001"/><display value="World"/></coding></jurisdiction><affectsState value="false"/><code value="events"/><resource value="Subscription"/><system value="false"/><type value="false"/><instance value="true"/><parameter><name value="eventsSinceNumber"/><use value="in"/><min value="0"/><max value="1"/><documentation value="The lowest event number to be included in the response (lower bound, inclusive)."/><type value="integer64"/></parameter><parameter><name value="eventsUntilNumber"/><use value="in"/><min value="0"/><max value="1"/><documentation value="The highest event number to be included in the response (upper bound, inclusive)."/><type value="integer64"/></parameter><parameter><name value="content"/><use value="in"/><min value="0"/><max value="1"/><documentation value="Requested content style of returned data. Codes from backport-content-value-set (e.g., empty, id-only, full-resource). This is a hint to the server what a client would prefer, and MAY be ignored."/><type value="code"/><binding><strength value="required"/><valueSet value="http://hl7.org/fhir/ValueSet/subscription-payload-content|6.0.0-ballot4"/></binding></parameter><parameter><name value="return"/><use value="out"/><min value="1"/><max value="1"/><documentation value="The operation returns a valid notification bundle, with the first entry being a SubscriptionStatus resource. The bundle type is &quot;subscription-notification&quot;."/><type value="Bundle"/></parameter></OperationDefinition>