description: Defines a computable value set as one that SHALL have an expression-based definition (i.e. a value set defined intensionally using expressions of the code systems involved) and MAY have an expansion included. The expression-based definition SHALL be represented in only one of three ways; using the compose element, using the expression extension, or using the rules-text extension to provide a step-by-step process for expanding the value set definition
package_name: rs/hl7.fhir.us.ph
derivation: constraint
name: USPublicHealthComputableValueSet
type: ValueSet
elements:
  extension:
    short: Human instructions for constructing the valueset
    type: Extension
    mustSupport: true
    url: http://hl7.org/fhir/StructureDefinition/valueset-rules-text
    index: 0
    slicing:
      slices:
        rulesText:
          match: {}
          schema: {short: Human instructions for constructing the valueset, type: Extension, mustSupport: true, url: 'http://hl7.org/fhir/StructureDefinition/valueset-rules-text', index: 0}
          min: 0
          max: 1
        expression:
          match: {}
          schema: {short: Machine instructions for constructing the value set, type: Extension, mustSupport: true, url: 'http://hl7.org/fhir/StructureDefinition/valueset-expression', index: 1}
          min: 0
          max: 1
  compose: {mustSupport: true, index: 2}
package_version: library-1.0.0-ballot
extensions:
  rulesText: {url: 'http://hl7.org/fhir/StructureDefinition/valueset-rules-text', min: 0, max: 1, short: Human instructions for constructing the valueset, type: Extension, mustSupport: true, index: 0}
  expression: {url: 'http://hl7.org/fhir/StructureDefinition/valueset-expression', min: 0, max: 1, short: Machine instructions for constructing the value set, type: Extension, mustSupport: true, index: 1}
class: profile
kind: resource
url: http://hl7.org/fhir/us/ph-library/StructureDefinition/us-ph-computable-valueset
base: http://hl7.org/fhir/us/ph-library/StructureDefinition/us-ph-valueset
version: 1.0.0-ballot