<status value="draft" /> <date value="2013-07-04" /> <publisher value="HL7" /> <contact> <telecom> <system value="url" /> <value value="http://www.hl7.org" /> </telecom> </contact> <description value="Allows disabling certain questionnaire options for the containing item based on evaluating expressions." /> <fhirVersion value="4.6.0" /> <kind value="complex-type" /> <abstract value="false" /> <context> <type value="element" /> <expression value="Questionnaire.item" /> </context> <contextInvariant value="answerValueset or answerOption" /> <type value="Extension" /> <baseDefinition value="http://hl7.org/fhir/StructureDefinition/Extension" /> <derivation value="constraint" /> <differential> <element id="Extension"> <path value="Extension" /> <short value="Constraint" /> <definition value="Allows disabling certain questionnaire options for the containing item based on evaluating expressions." /> <min value="0" /> <max value="*" /> </element> <element id="Extension.extension:option"> <path value="Extension.extension" /> <sliceName value="option" /> <short value="Option to exclude" /> <definition value="Indicates one or more options that should be disabled if the specified expression evaluates to true" /> <comment value="Options listed are expected to correspond to either answerOption values or Codings found in the answerValueset expansion. Systems SHOULD treat non-matching answerOptions and MAY treat non-matching answerValueset Codings as an error." /> <min value="1" /> <max value="*" /> <type> <code value="Extension" /> </type> </element> <element id="Extension.extension:option.extension"> <path value="Extension.extension.extension" /> <max value="0" /> </element> <element id="Extension.extension:option.url"> <path value="Extension.extension.url" /> <type> <code value="uri" /> </type> <fixedUri value="option" /> </element> <element id="Extension.extension:option.value[x]"> <path value="Extension.extension.value[x]" /> <min value="1" /> <type> <code value="integer" /> </type> <type> <code value="date" /> </type> <type> <code value="time" /> </type> <type> <code value="string" /> </type> <type> <code value="Coding" /> </type> <type> <code value="Reference" /> </type> </element> <element id="Extension.extension:expression"> <path value="Extension.extension" /> <sliceName value="expression" /> <short value="Expression to trigger exclusion" /> <definition value="The expression to evaluate. If the evaluation results in true, then the specified options will be suppressed." /> <min value="1" /> <max value="1" /> <type> <code value="Extension" /> </type> </element> <element id="Extension.extension:expression.extension"> <path value="Extension.extension.extension" /> <max value="0" /> </element> <element id="Extension.extension:requirements.url"> <path value="Extension.extension.url" /> <type> <code value="uri" /> </type> <fixedUri value="requirements" /> </element> <element id="Extension.extension:expression.value[x]"> <path value="Extension.extension.value[x]" /> <min value="1" /> <type> <code value="Expression" /> </type> </element> <element id="Extension.url"> <path value="Extension.url" /> <type> <code value="uri" /> </type> <fixedUri value="http://hl7.org/fhir/StructureDefinition/questionnaire-optionRestriction" /> </element> </differential> </StructureDefinition>