<status value="active"/> <kind value="operation"/> <description value="True if value logically not known, e.g. if indeterminate, not asked etc. "/> <code value="is_null"/> <system value="false"/> <instance value="true"/> <parameter> <name value="return"/> <use value="out"/> <min value="1"/> <max value="1"/> <type value="boolean"/> </parameter> </OperationDefinition> </contained> <extension url="http://hl7.org/fhir/tools/StructureDefinition/web-source"> <valueUrl value="https://specifications.openehr.org/releases/RM/Release-1.1.0/data_structures.html#_element_class"/> </extension> <extension url="http://hl7.org/fhir/tools/StructureDefinition/type-operation"> <valueCanonical value="#is_null"/> </extension> <extension url="http://hl7.org/fhir/StructureDefinition/structuredefinition-wg"> <valueCode value="fhir"/> </extension> <extension url="http://hl7.org/fhir/tools/StructureDefinition/view-hint"> <valueCode value="element-view-replace-cardinality"/> </extension> <extension url="http://hl7.org/fhir/StructureDefinition/structuredefinition-fmm"> <valueInteger value="3"> <extension url="http://hl7.org/fhir/StructureDefinition/structuredefinition-conformance-derivedFrom"> <valueCanonical value="http://openehr.org/fhir/ImplementationGuide/openehr.base"/> </extension> </valueInteger> </extension> <extension url="http://hl7.org/fhir/StructureDefinition/structuredefinition-standards-status"> <valueCode value="informative"> <extension url="http://hl7.org/fhir/StructureDefinition/structuredefinition-conformance-derivedFrom"> <valueCanonical value="http://openehr.org/fhir/ImplementationGuide/openehr.base"/> </extension> </valueCode> </extension> <url value="http://openehr.org/fhir/StructureDefinition/ELEMENT"/> <version value="0.1.0-snapshot"/> <name value="ELEMENT"/> <title value="ELEMENT"/> <status value="active"/> <experimental value="false"/> <date value="2025-09-06T15:35:39+10:00"/> <publisher value="openEHR + HL7"/> <contact> <telecom> <system value="url"/> <value value="http://www.openehr.org"/> </telecom> </contact> <description value="The leaf variant of `ITEM`, to which a `DATA_VALUE` instance is attached. "/> <jurisdiction> <coding> <system value="http://unstats.un.org/unsd/methods/m49/m49.htm"/> <code value="001"/> </coding> </jurisdiction> <fhirVersion value="5.0.0"/> <mapping> <identity value="rim"/> <uri value="http://hl7.org/v3"/> <name value="RIM Mapping"/> </mapping> <kind value="logical"/> <abstract value="false"/> <type value="http://openehr.org/fhir/StructureDefinition/ELEMENT"/> <baseDefinition value="http://openehr.org/fhir/StructureDefinition/ITEM"/> <derivation value="specialization"/> <snapshot> <extension url="http://hl7.org/fhir/tools/StructureDefinition/snapshot-base-version"> <valueString value="0.1.0-snapshot"/> </extension> <element id="ELEMENT"> <path value="ELEMENT"/> <short value="The leaf variant of `ITEM`, to which a `DATA_VALUE` instance is attached."/> <definition value="The leaf variant of `ITEM`, to which a `DATA_VALUE` instance is attached. "/> <min value="0"/> <max value="*"/> <base> <path value="Base"/> <min value="0"/> <max value="*"/> </base> <constraint> <key value="Links_valid"/> <severity value="error"/> <human value="Links valid must be present"/> <expression value="links.exists() implies links.empty().not()"/> <source value="http://openehr.org/fhir/StructureDefinition/LOCATABLE"/> </constraint> <constraint> <key value="Archetyped_valid"/> <severity value="error"/> <human value="Archetyped valid must satisfy exclusive conditions"/> <expression value="is_archetype_root() xor archetype_details .empty()"/> <source value="http://openehr.org/fhir/StructureDefinition/LOCATABLE"/> </constraint> <constraint> <key value="Archetype_node_id_valid"/> <severity value="error"/> <human value="Archetype node id valid must not be empty"/> <expression value="archetype_node_id.empty().not()"/> <source value="http://openehr.org/fhir/StructureDefinition/LOCATABLE"/> </constraint> <constraint> <key value="Inv_is_null_valid"/> <severity value="error"/> <human value="Inv is null valid"/> <expression value="is_null() = (value .empty())"/> </constraint> <constraint> <key value="Inv_null_flavour_indicated"/> <severity value="error"/> <human value="Inv null flavour indicated must satisfy exclusive conditions"/> <expression value="is_null() xor null_flavour .empty()"/> </constraint> <constraint> <key value="Inv_null_flavour_valid"/> <severity value="error"/> <human value="Inv null flavour valid must satisfy conditional constraints"/> <expression value="is_null() implies terminology (Terminology_id_openehr).has_code_for_group_id (Group_id_null_flavour, null_flavour.defining_code)"/> </constraint> <constraint> <key value="Inv_null_reason_valid"/> <severity value="error"/> <human value="Inv null reason valid must be present"/> <expression value="null_reason.exists() implies is_null()"/> </constraint> <isModifier value="false"/> <mapping> <identity value="rim"/> <map value="n/a"/> </mapping> </element> <element id="ELEMENT.name"> <path value="ELEMENT.name"/> <short value="Runtime name of this fragment, used to build runtime paths."/> <definition value="Runtime name of this fragment, used to build runtime paths. This is the term provided via a clinical application or batch process to name this EHR construct: its retention in the EHR faithfully preserves the original label by which this entry was known to end users."/> <min value="1"/> <max value="1"/> <base> <path value="LOCATABLE.name"/> <min value="1"/> <max value="1"/> </base> <type> <code value="http://openehr.org/fhir/StructureDefinition/DV-TEXT"/> </type> <isModifier value="false"/> </element> <element id="ELEMENT.archetype-node-id"> <path value="ELEMENT.archetype_node_id"/> <short value="Design-time archetype identifier of this node taken from its generating archetype; used to build archetype paths."/> <definition value="Design-time archetype identifier of this node taken from its generating archetype; used to build archetype paths. Always in the form of an at-code, e.g. `at0005`. This value enables a 'standardised' name for this node to be generated, by referring to the generating archetype local terminology. At an archetype root point, the value of this attribute is always the stringified form of the `_archetype_id_` found in the `_archetype_details_` object."/> <min value="1"/> <max value="1"/> <base> <path value="LOCATABLE.archetype_node_id"/> <min value="1"/> <max value="1"/> </base> <type> <code value="string"/> </type> <isModifier value="false"/> </element> <element id="ELEMENT.uid"> <path value="ELEMENT.uid"/> <short value="Optional globally unique object identifier for root points of archetyped structures."/> <definition value="Optional globally unique object identifier for root points of archetyped structures."/> <min value="0"/> <max value="1"/> <base> <path value="LOCATABLE.uid"/> <min value="0"/> <max value="1"/> </base> <type> <code value="http://openehr.org/fhir/StructureDefinition/UID-BASED-ID"/> </type> <isModifier value="false"/> </element> <element id="ELEMENT.links"> <path value="ELEMENT.links"/> <short value="Links to other archetyped structures (data whose root object inherits from `ARCHETYPED`, such as `ENTRY`, `SECTION` and so on)."/> <definition value="Links to other archetyped structures (data whose root object inherits from `ARCHETYPED`, such as `ENTRY`, `SECTION` and so on). Links may be to structures in other compositions."/> <min value="0"/> <max value="*"/> <base> <path value="LOCATABLE.links"/> <min value="0"/> <max value="*"/> </base> <type> <code value="http://openehr.org/fhir/StructureDefinition/LINK"/> </type> <isModifier value="false"/> </element> <element id="ELEMENT.archetype-details"> <path value="ELEMENT.archetype_details"/> <short value="Details of archetyping used on this node."/> <definition value="Details of archetyping used on this node."/> <min value="0"/> <max value="1"/> <base> <path value="LOCATABLE.archetype_details"/> <min value="0"/> <max value="1"/> </base> <type> <code value="http://openehr.org/fhir/StructureDefinition/ARCHETYPED"/> </type> <isModifier value="false"/> </element> <element id="ELEMENT.feeder-audit"> <path value="ELEMENT.feeder_audit"/> <short value="Audit trail from non-openEHR system of original commit of information forming the content of this node, or from a conversion gateway which has synthesised this node."/> <definition value="Audit trail from non-openEHR system of original commit of information forming the content of this node, or from a conversion gateway which has synthesised this node."/> <min value="0"/> <max value="1"/> <base> <path value="LOCATABLE.feeder_audit"/> <min value="0"/> <max value="1"/> </base> <type> <code value="http://openehr.org/fhir/StructureDefinition/FEEDER-AUDIT"/> </type> <isModifier value="false"/> </element> <element id="ELEMENT.null-flavour"> <path value="ELEMENT.null_flavour"/> <short value="Flavour of null value, e."/> <definition value="Flavour of null value, e.g. `253|unknown|`, `271|no information|`, `272|masked|`, and `273|not applicable|`."/> <min value="0"/> <max value="1"/> <base> <path value="ELEMENT.null_flavour"/> <min value="0"/> <max value="1"/> </base> <type> <code value="http://openehr.org/fhir/StructureDefinition/DV-CODED-TEXT"/> </type> <isModifier value="false"/> </element> <element id="ELEMENT.value"> <path value="ELEMENT.value"/> <short value="Property representing leaf value object of `ELEMENT`."/> <definition value="Property representing leaf value object of `ELEMENT`. In real data, any concrete subtype of `DATA_VALUE` can be used."/> <min value="0"/> <max value="1"/> <base> <path value="ELEMENT.value"/> <min value="0"/> <max value="1"/> </base> <type> <code value="http://openehr.org/fhir/StructureDefinition/DATA-VALUE"/> </type> <isModifier value="false"/> </element> <element id="ELEMENT.null-reason"> <path value="ELEMENT.null_reason"/> <short value="Optional specific reason for null value; if set, `_null_flavour_` must be set."/> <definition value="Optional specific reason for null value; if set, `_null_flavour_` must be set. Null reason may apply only to a minority of clinical data, commonly needed in reporting contexts."/> <min value="0"/> <max value="1"/> <base> <path value="ELEMENT.null_reason"/> <min value="0"/> <max value="1"/> </base> <type> <code value="http://openehr.org/fhir/StructureDefinition/DV-TEXT"/> </type> <isModifier value="false"/> </element> </snapshot> <differential> <element id="ELEMENT"> <path value="ELEMENT"/> <short value="The leaf variant of `ITEM`, to which a `DATA_VALUE` instance is attached."/> <definition value="The leaf variant of `ITEM`, to which a `DATA_VALUE` instance is attached. "/> <min value="0"/> <max value="*"/> <constraint> <key value="Inv_is_null_valid"/> <severity value="error"/> <human value="Inv is null valid"/> <expression value="is_null() = (value .empty())"/> </constraint> <constraint> <key value="Inv_null_flavour_indicated"/> <severity value="error"/> <human value="Inv null flavour indicated must satisfy exclusive conditions"/> <expression value="is_null() xor null_flavour .empty()"/> </constraint> <constraint> <key value="Inv_null_flavour_valid"/> <severity value="error"/> <human value="Inv null flavour valid must satisfy conditional constraints"/> <expression value="is_null() implies terminology (Terminology_id_openehr).has_code_for_group_id (Group_id_null_flavour, null_flavour.defining_code)"/> </constraint> <constraint> <key value="Inv_null_reason_valid"/> <severity value="error"/> <human value="Inv null reason valid must be present"/> <expression value="null_reason.exists() implies is_null()"/> </constraint> <isModifier value="false"/> </element> <element id="ELEMENT.null-flavour"> <path value="ELEMENT.null_flavour"/> <short value="Flavour of null value, e."/> <definition value="Flavour of null value, e.g. `253|unknown|`, `271|no information|`, `272|masked|`, and `273|not applicable|`."/> <min value="0"/> <max value="1"/> <type> <code value="http://openehr.org/fhir/StructureDefinition/DV-CODED-TEXT"/> </type> <isModifier value="false"/> </element> <element id="ELEMENT.value"> <path value="ELEMENT.value"/> <short value="Property representing leaf value object of `ELEMENT`."/> <definition value="Property representing leaf value object of `ELEMENT`. In real data, any concrete subtype of `DATA_VALUE` can be used."/> <min value="0"/> <max value="1"/> <type> <code value="http://openehr.org/fhir/StructureDefinition/DATA-VALUE"/> </type> <isModifier value="false"/> </element> <element id="ELEMENT.null-reason"> <path value="ELEMENT.null_reason"/> <short value="Optional specific reason for null value; if set, `_null_flavour_` must be set."/> <definition value="Optional specific reason for null value; if set, `_null_flavour_` must be set. Null reason may apply only to a minority of clinical data, commonly needed in reporting contexts."/> <min value="0"/> <max value="1"/> <type> <code value="http://openehr.org/fhir/StructureDefinition/DV-TEXT"/> </type> <isModifier value="false"/> </element> </differential> </StructureDefinition>

Generated Narrative: StructureDefinition ELEMENT

Name	Flags	Card.	Type	Description & Constraints
ELEMENT	C	0..*	ITEM	The leaf variant of `ITEM`, to which a `DATA_VALUE` instance is attached. Elements defined in Ancestors:name, archetype_node_id, uid, links, archetype_details, feeder_audit Constraints: Inv_is_null_valid, Inv_null_flavour_indicated, Inv_null_flavour_valid, Inv_null_reason_valid
null_flavour		0..1	DV_CODED_TEXT	Flavour of null value, e.
value		0..1	DATA_VALUE	Property representing leaf value object of `ELEMENT`.
null_reason		0..1	DV_TEXT	Optional specific reason for null value; if set, `_null_flavour_` must be set.
Documentation for this format