<status value="draft" /> <experimental value="true" /> <date value="2019-02-10T00:11:08+00:00" /> <publisher value="HL7 FHIR Standard" /> <contact> <telecom> <system value="url" /> <value value="http://hl7.org/fhir" /> </telecom> </contact> <description value="Data Element for Dosage.asNeeded[x]" /> <purpose value="Data Elements are defined for each element to assist in questionnaire construction etc" /> <fhirVersion value="4.0.0" /> <mapping> <identity value="rim" /> <uri value="http://hl7.org/v3" /> <name value="RIM Mapping" /> </mapping> <mapping> <identity value="v2" /> <uri value="http://hl7.org/v2" /> <name value="HL7 v2 Mapping" /> </mapping> <kind value="logical" /> <abstract value="false" /> <type value="Dosage.asNeeded[x]" /> <baseDefinition value="http://hl7.org/fhir/StructureDefinition/Element" /> <derivation value="specialization" /> <snapshot> <element id="Dosage.asNeeded[x]"> <path value="Dosage.asNeeded[x]" /> <short value="Take "as needed" (for x)" /> <definition value="Indicates whether the Medication is only taken when needed within a specific dosing schedule (Boolean option), or it indicates the precondition for taking the Medication (CodeableConcept)." /> <comment value="Can express "as needed" without a reason by setting the Boolean = True. In this case the CodeableConcept is not populated. Or you can express "as needed" with a reason by including the CodeableConcept. In this case the Boolean is assumed to be True. If you set the Boolean to False, then the dose is given according to the schedule and is not "prn" or "as needed"." /> <min value="0" /> <max value="1" /> <base> <path value="Dosage.asNeeded[x]" /> <min value="0" /> <max value="1" /> </base> <type> <code value="boolean" /> </type> <type> <code value="CodeableConcept" /> </type> <isModifier value="false" /> <isSummary value="true" /> <binding> <extension url="http://hl7.org/fhir/StructureDefinition/elementdefinition-bindingName"> <valueString value="MedicationAsNeededReason" /> </extension> <strength value="example" /> <description value="A coded concept identifying the precondition that should be met or evaluated prior to consuming or administering a medication dose. For example "pain", "30 minutes prior to sexual intercourse", "on flare-up" etc." /> </binding> <mapping> <identity value="v2" /> <map value="TQ1-9" /> </mapping> <mapping> <identity value="rim" /> <map value=".outboundRelationship[typeCode=PRCN].target[classCode=OBS, moodCode=EVN, code="as needed"].value=boolean or codable concept" /> </mapping> </element> </snapshot> </StructureDefinition>