description: 'USCDI includes a data element for Sex, intended to support the exchange of a recorded sex value. This extension aligns with the USCDI definition of Sex: \"Documentation of a specific instance of sex.\" It enables systems to share the sex value as it was documented in a particular context. Systems choosing to record sources of information should use the [Provenance resource](element-level-provenance.html).' package_name: hl7.fhir.us.core derivation: constraint name: USCoreSexExtension type: Extension elements: url: pattern: {type: uri, value: 'http://hl7.org/fhir/us/core/StructureDefinition/us-core-sex'} type: uri index: 0 value: choices: [valueCoding] index: 2 valueCoding: {type: Coding, choiceOf: value, index: 3} package_version: 8.0.0 class: extension kind: complex-type url: http://hl7.org/fhir/us/core/StructureDefinition/us-core-sex base: http://hl7.org/fhir/StructureDefinition/Extension version: 8.0.0 required: [value, valueCoding]