RTO_PQ_PQ: Ratio (V3 Data Type) - Clinical Document Architecture v2.0.1-sd-202510-matchbox-patch

• Table of Contents
• Artifacts Summary
• RTO_PQ_PQ: Ratio (V3 Data Type)

Logical Model: RTO_PQ_PQ: Ratio (V3 Data Type)

Official URL:http://hl7.org/cda/stds/core/StructureDefinition/RTO-PQ-PQ	Version:2.0.1-sd-202510-matchbox-patch
Active as of 2025-10-29	Computable Name:RTO_PQ_PQ

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 .

Usages:

• Use this Logical Model: Observation (CDA Class), ObservationRange (CDA Class), PharmIngredient (CDA Pharm Class) and SubstanceAdministration (CDA Class)

You can also check for usages in the FHIR IG Statistics

Formal Views of Template Content

Description of Template, Differentials, Snapshots and how the different presentations work.

Other representations of profile: CSV, Excel

Resource Content

{
  "resourceType" : "StructureDefinition",
  "id" : "RTO-PQ-PQ",
  "extension" : [
    {
      "url" : "http://hl7.org/fhir/tools/StructureDefinition/logical-target",
      "_valueBoolean" : {
        "extension" : [
          {
            "url" : "http://hl7.org/fhir/StructureDefinition/data-absent-reason",
            "valueCode" : "not-applicable"
          }
        ]
      }
    },
    {
      "url" : "http://hl7.org/fhir/tools/StructureDefinition/xml-namespace",
      "valueUri" : "urn:hl7-org:v3"
    },
    {
      "url" : "http://hl7.org/fhir/tools/StructureDefinition/logical-container",
      "valueUri" : "http://hl7.org/cda/stds/core/StructureDefinition/ClinicalDocument"
    }
  ],
  "url" : "http://hl7.org/cda/stds/core/StructureDefinition/RTO-PQ-PQ",
  "version" : "2.0.1-sd-202510-matchbox-patch",
  "name" : "RTO_PQ_PQ",
  "title" : "RTO_PQ_PQ: Ratio (V3 Data Type)",
  "status" : "active",
  "experimental" : false,
  "date" : "2025-10-29T22:15:57+01:00",
  "publisher" : "Health Level 7",
  "contact" : [
    {
      "name" : "HL7 International - Structured Documents",
      "telecom" : [
        {
          "system" : "url",
          "value" : "http://www.hl7.org/Special/committees/structure"
        },
        {
          "system" : "email",
          "value" : "structdog@lists.HL7.org"
        }
      ]
    }
  ],
  "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 .",
  "fhirVersion" : "5.0.0",
  "mapping" : [
    {
      "identity" : "rim",
      "uri" : "http://hl7.org/v3",
      "name" : "RIM Mapping"
    }
  ],
  "kind" : "logical",
  "abstract" : false,
  "type" : "http://hl7.org/cda/stds/core/StructureDefinition/RTO_PQ_PQ",
  "baseDefinition" : "http://hl7.org/cda/stds/core/StructureDefinition/QTY",
  "derivation" : "specialization",
  "differential" : {
    "element" : [
      {
        "id" : "RTO_PQ_PQ",
        "path" : "RTO_PQ_PQ",
        "min" : 1,
        "max" : "*"
      },
      {
        "id" : "RTO_PQ_PQ.numerator",
        "path" : "RTO_PQ_PQ.numerator",
        "label" : "Numerator",
        "definition" : "The quantity that is being divided in the ratio. The default is the integer number 1 (one.)",
        "min" : 0,
        "max" : "1",
        "type" : [
          {
            "code" : "http://hl7.org/cda/stds/core/StructureDefinition/PQ"
          }
        ]
      },
      {
        "id" : "RTO_PQ_PQ.denominator",
        "path" : "RTO_PQ_PQ.denominator",
        "label" : "Denominator",
        "definition" : "The quantity that devides the numerator in the ratio. The default is the integer number 1 (one.) The denominator must not be zero.",
        "min" : 0,
        "max" : "1",
        "type" : [
          {
            "code" : "http://hl7.org/cda/stds/core/StructureDefinition/PQ"
          }
        ]
      }
    ]
  }
}