description: A modifier extension for ElementDefinition that indicates the element uses a custom non-FHIR type. Supported types include 'any' (arbitrary JSON value), 'password' (sensitive credential), 'secret' (encrypted sensitive data), etc. package_name: io.health-samurai.core.r4b derivation: constraint name: CustomType type: Extension elements: extension: {index: 0} url: pattern: {type: Uri, value: 'http://health-samurai.io/fhir/core/StructureDefinition/additional-properties-custom-type'} index: 1 value: short: Custom type code choices: [valueCode] index: 3 valueCode: {type: code, short: Custom type code, choiceOf: value, index: 4} package_version: 0.2601.0 extensions: {} class: extension kind: complex-type url: http://health-samurai.io/fhir/core/StructureDefinition/additional-properties-custom-type base: http://hl7.org/fhir/StructureDefinition/Extension version: 0.2601.0 required: [valueCode, value]