description: A quantity constructed as the quotient of a numerator quantity divided by a denominator quantity. Common factors in the numerator and denominator are not automatically cancelled out. The data type supports titers (e.g., \"1:128\") and other quantities produced by laboratories that truly represent ratios. Ratios are not simply \"structured numerics\", particularly blood pressure measurements (e.g. \"120/60\") are not ratios. In many cases the should be used instead of the . package_name: hl7.cda.uv.core derivation: specialization name: RTO_PQ_PQ type: http://hl7.org/cda/stds/core/StructureDefinition/RTO_PQ_PQ elements: numerator: {type: 'http://hl7.org/cda/stds/core/StructureDefinition/PQ', label: Numerator, index: 0} denominator: {type: 'http://hl7.org/cda/stds/core/StructureDefinition/PQ', label: Denominator, index: 1} package_version: 2.0.0-sd class: logical kind: logical url: http://hl7.org/cda/stds/core/StructureDefinition/RTO-PQ-PQ base: http://hl7.org/cda/stds/core/StructureDefinition/QTY version: 2.0.0-sd