<status value="active" /> <publisher value="Nictiz" /> <contact> <name value="Nictiz" /> <telecom> <system value="url" /> <value value="https://www.nictiz.nl" /> <use value="work" /> </telecom> </contact> <description value="Pre-adopt of the `Dosage.asNeededFor` concept from the FHIR R5 Dosage data type. In R4, `Dosage.asNeededCodeableConcept` has a maximum cardinality of 1. Additional 'asNeeded' data can be represented by adding this extension to Dosage." /> <copyright value="Copyright and related rights waived via CC0, https://creativecommons.org/publicdomain/zero/1.0/. This does not apply to information from third parties, for example a medical terminology system. The implementer alone is responsible for identifying and obtaining any necessary licenses or authorizations to utilize third party IP in connection with the specification or otherwise." /> <fhirVersion value="4.0.1" /> <kind value="complex-type" /> <abstract value="false" /> <context> <type value="element" /> <expression value="Dosage" /> </context> <type value="Extension" /> <baseDefinition value="http://hl7.org/fhir/StructureDefinition/Extension" /> <derivation value="constraint" /> <differential> <element id="Extension"> <path value="Extension" /> <definition value="Pre-adopt from FHIR R5 of the `Dosage.asNeededFor` element." /> </element> <element id="Extension.url"> <path value="Extension.url" /> <fixedUri value="http://nictiz.nl/fhir/StructureDefinition/ext-Dosage-AsNeededFor" /> </element> <element id="Extension.value[x]"> <path value="Extension.value[x]" /> <definition value="Indicates whether the Medication is only taken based on a precondition for taking the Medication (CodeableConcept)." /> <comment value="If only one 'asNeeded' concept is exchanged within a Dosage, use `Dosage.asNeeded[x]`. This extension is only used when multiple 'asNeeded' concepts are to be exchanged." /> <type> <code value="CodeableConcept" /> </type> </element> </differential> </StructureDefinition>