description: This profile represents the constraint applied to the Ratio data type by the PS-ON project to use UCUM as the code system for units in a way that is informed by the constraints of the [Ratio-UV-IPS profile](http://hl7.org/fhir/uv/ips/StructureDefinition-Ratio-uv-ips.html).
package_name: ca.on.oh.patient-summary
derivation: constraint
name: RatioPSON
type: Ratio
elements:
  numerator: {type: Quantity, mustSupport: true, index: 0}
  denominator: {type: Quantity, mustSupport: true, index: 1}
package_version: 0.10.0-alpha-1
class: complex-type
kind: complex-type
url: http://ontariohealth.ca/fhir/StructureDefinition/ca-on-ps-profile-ratio
base: http://hl7.org/fhir/StructureDefinition/Ratio
version: 0.9.1