CDS Hooks
3.0.0 - R3 Normative/Trial-Use
CDS Hooks, published by HL7 International / Clinical Decision Support. This guide is not an authorized publication; it is the continuous build for version 3.0.0 built by the FHIR (HL7® FHIR® Standard) CI Build. This version is based on the current content of https://github.com/HL7/cds-hooks/ and changes regularly. See the Directory of published versions
| Page standards status: Informative | Maturity Level: 1 |
XML representation of the CDSHooksExtensions logical model.
<StructureDefinition xmlns="http://hl7.org/fhir">
<id value="CDSHooksExtensions"/>
<language value="en"/>
<text>
<status value="extensions"/>
<div xmlns="http://www.w3.org/1999/xhtml"><p class="res-header-id"><b>Generated Narrative: StructureDefinition CDSHooksExtensions</b></p><table border="0" cellpadding="0" cellspacing="0" class="xhtTableBorder0"><tr class="xhtRowBorder1"><th scope="col" style="" class="hierarchy xhtCellBorder0"><a href="https://build.fhir.org/ig/FHIR/ig-guidance/readingIgs.html#table-views" title="The logical name of the element">Name</a></th><th scope="col" style="" class="hierarchy xhtCellBorder0"><a href="https://build.fhir.org/ig/FHIR/ig-guidance/readingIgs.html#table-views" title="Information about the use of the element">Flags</a></th><th scope="col" style="" class="hierarchy xhtCellBorder0"><a href="https://build.fhir.org/ig/FHIR/ig-guidance/readingIgs.html#table-views" title="Minimum and Maximum # of times the element can appear in the instance">Card.</a></th><th scope="col" style="; width: 100px" class="hierarchy xhtCellBorder0"><a href="https://build.fhir.org/ig/FHIR/ig-guidance/readingIgs.html#table-views" title="Reference to the type of the element">Type</a></th><th scope="col" style="" class="hierarchy xhtCellBorder0"><a href="https://build.fhir.org/ig/FHIR/ig-guidance/readingIgs.html#table-views" title="Additional information about the element">Description & Constraints</a><span style="float: right"><a href="https://build.fhir.org/ig/FHIR/ig-guidance/readingIgs.html#table-views" title="Legend for this format"><img src="data:image/png;base64,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" alt="doco" style="background-color: inherit"/></a></span></th></tr><tr class="xhtRowBorder0 xhtRowEven"><td style="background-image: url(tbl_bck1.png)" class="hierarchy xhtCellBorder0 xhtCellNoWrap"><img src="tbl_spacer.png" alt="" style="background-color: inherit" class="hierarchy"/><img src="icon_element.gif" alt="" style="background-color: white; background-color: inherit" title="Element" class="hierarchy"/> <a href="StructureDefinition-CDSHooksExtensions-definitions.html#CDSHooksExtensions" title="A JSON object that has properties where the names are defined by the extension definitions">CDSHooksExtensions</a><a name="CDSHooksExtensions"> </a></td><td style="" class="hierarchy xhtCellBorder0"/><td style="" class="hierarchy xhtCellBorder0"><span class="xhtPieceDeEmphasized">0</span><span class="xhtPieceDeEmphasized">..</span><span class="xhtPieceDeEmphasized">*</span></td><td style="" class="hierarchy xhtCellBorder0"><a href="http://build.fhir.org/types.html#Base">Base</a></td><td style="" class="hierarchy xhtCellBorder0">Object that has Named Extension Properties</td></tr>
<tr class="xhtRowBorder0 xhtRowOdd"><td style="background-image: url(tbl_bck00.png)" class="hierarchy xhtCellBorder0 xhtCellNoWrap"><img src="tbl_spacer.png" alt="" style="background-color: inherit" class="hierarchy"/><img src="tbl_vjoin_end.png" alt="" style="background-color: inherit" class="hierarchy"/><img src="icon_datatype.gif" alt="" style="background-color: #F7F7F7; background-color: inherit" title="Data Type" class="hierarchy"/> <span style="position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0, 0, 0, 0); white-space: nowrap; border: 0" class="sr-only">CDSHooksExtensions.</span><a href="StructureDefinition-CDSHooksExtensions-definitions.html#CDSHooksExtensions.extension" title="An extension where the name is defined by the extension definition, and the extension definition is of any type (including primitives, though the 'id' element cannot be represented for primitives)">extension</a><a name="CDSHooksExtensions.extension"> </a></td><td style="" class="hierarchy xhtCellBorder0"/><td style="" class="hierarchy xhtCellBorder0">0..*</td><td style="" class="hierarchy xhtCellBorder0">Base</td><td style="" class="hierarchy xhtCellBorder0">An extension of any type<br/><a href="http://build.fhir.org/ig/FHIR/fhir-tools-ig/format-extensions.html#extension-related-extensions">This element can be extended by named JSON elements</a><br/></td></tr>
<tr><td colspan="5" class="hierarchy"><br/><a href="https://build.fhir.org/ig/FHIR/ig-guidance/readingIgs.html#table-views" title="Legend for this format"><img src="data:image/png;base64,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" alt="doco" style="background-color: inherit"/> Documentation for this format</a></td></tr></table></div>
</text>
<extension
url="http://hl7.org/fhir/StructureDefinition/structuredefinition-fmm">
<valueInteger value="1"/>
</extension>
<extension
url="http://hl7.org/fhir/StructureDefinition/structuredefinition-wg">
<valueCode value="cds"/>
</extension>
<extension
url="http://hl7.org/fhir/StructureDefinition/structuredefinition-standards-status">
<valueCode value="informative"/>
</extension>
<extension
url="http://hl7.org/fhir/tools/StructureDefinition/json-suppress-resourcetype">
<valueBoolean value="true"/>
</extension>
<extension
url="http://hl7.org/fhir/tools/StructureDefinition/extension-style">
<valueCode value="named-elements"/>
</extension>
<url
value="http://cds-hooks.hl7.org/StructureDefinition/CDSHooksExtensions"/>
<identifier>
<system value="urn:ietf:rfc:3986"/>
<value value="urn:oid:2.16.840.1.113883.4.642.40.93.42.3"/>
</identifier>
<version value="3.0.0"/>
<name value="CDSHooksExtensions"/>
<title value="CDSHooks Services Extensions"/>
<status value="active"/>
<experimental value="false"/>
<date value="2026-10-19T12:39:41+00:00"/>
<publisher value="HL7 International / Clinical Decision Support"/>
<contact>
<name value="HL7 International / Clinical Decision Support"/>
<telecom>
<system value="url"/>
<value value="http://www.hl7.org/Special/committees/dss/index.cfm"/>
</telecom>
<telecom>
<system value="email"/>
<value value="cds@lists.HL7.org"/>
</telecom>
</contact>
<description
value="This is a concrete subtype of Base that has extensions (though the format in JSON is different)"/>
<jurisdiction>
<coding>
<system value="http://unstats.un.org/unsd/methods/m49/m49.htm"/>
<code value="001"/>
<display value="World"/>
</coding>
</jurisdiction>
<fhirVersion value="4.0.1"/>
<kind value="logical"/>
<abstract value="false"/>
<type
value="http://cds-hooks.hl7.org/StructureDefinition/CDSHooksExtensions"/>
<baseDefinition value="http://hl7.org/fhir/StructureDefinition/Base"/>
<derivation value="specialization"/>
<snapshot>
<extension
url="http://hl7.org/fhir/tools/StructureDefinition/snapshot-base-version">
<valueString value="4.0.1"/>
</extension>
<element id="CDSHooksExtensions">
<path value="CDSHooksExtensions"/>
<short value="Object that has Named Extension Properties"/>
<definition
value="A JSON object that has properties where the names are defined by the extension definitions"/>
<comment
value="Extension structures SHOULD use a strategy for naming that ensures global uniqueness, such as reverse-domain-name notation, e.g. com.cds-hooks.sandbox.myextension-practitionerspecialty. How to handle complex extensions (objects) is not defined"/>
<min value="0"/>
<max value="*"/>
<base>
<path value="Base"/>
<min value="0"/>
<max value="*"/>
</base>
<isModifier value="false"/>
</element>
<element id="CDSHooksExtensions.extension">
<extension
url="http://hl7.org/fhir/tools/StructureDefinition/extension-style">
<valueCode value="named-elements"/>
</extension>
<path value="CDSHooksExtensions.extension"/>
<short value="An extension of any type"/>
<definition
value="An extension where the name is defined by the extension definition, and the extension definition is of any type (including primitives, though the 'id' element cannot be represented for primitives)"/>
<min value="0"/>
<max value="*"/>
<base>
<path value="CDSHooksExtensions.extension"/>
<min value="0"/>
<max value="*"/>
</base>
<type>
<code value="Base"/>
</type>
</element>
</snapshot>
<differential>
<element id="CDSHooksExtensions">
<path value="CDSHooksExtensions"/>
<short value="Object that has Named Extension Properties"/>
<definition
value="A JSON object that has properties where the names are defined by the extension definitions"/>
<comment
value="Extension structures SHOULD use a strategy for naming that ensures global uniqueness, such as reverse-domain-name notation, e.g. com.cds-hooks.sandbox.myextension-practitionerspecialty. How to handle complex extensions (objects) is not defined"/>
</element>
<element id="CDSHooksExtensions.extension">
<extension
url="http://hl7.org/fhir/tools/StructureDefinition/extension-style">
<valueCode value="named-elements"/>
</extension>
<path value="CDSHooksExtensions.extension"/>
<short value="An extension of any type"/>
<definition
value="An extension where the name is defined by the extension definition, and the extension definition is of any type (including primitives, though the 'id' element cannot be represented for primitives)"/>
<min value="0"/>
<max value="*"/>
<type>
<code value="Base"/>
</type>
</element>
</differential>
</StructureDefinition>