description: This extension represents an US Public Health Alternative Expression
package_name: hl7.fhir.us.ecr.r4b
derivation: constraint
name: USPublicHealthAlternativeExpressionExtension
type: Extension
elements:
  url:
    pattern: {type: Uri, value: 'http://hl7.org/fhir/us/ecr/StructureDefinition/us-ph-alternative-expression-extension'}
    index: 0
  valueExpression: {type: Expression, index: 1}
package_version: 2.1.2
class: extension
kind: complex-type
url: http://hl7.org/fhir/us/ecr/StructureDefinition/us-ph-alternative-expression-extension
base: http://hl7.org/fhir/StructureDefinition/Extension
version: 2.1.2