description: Provides a textual description of the strength of the active ingredient(s) in the medication package_name: hl7.fhir.ca.baseline derivation: constraint name: ExtMedicationStrengthDescription type: Extension elements: url: pattern: {type: Uri, value: 'http://prescribeit.ca/fhir/StructureDefinition/ext-medication-strength-description'} index: 0 value: choices: [valueString] index: 2 valueString: {type: string, choiceOf: value, index: 3} package_version: 1.1.6-pre class: extension kind: complex-type url: http://prescribeit.ca/fhir/StructureDefinition/ext-medication-strength-description base: http://hl7.org/fhir/StructureDefinition/Extension version: null required: [valueString, value]