# Ratio (MyHealth@EU) - MyHealth@EU Core v1.0.0

* [**Table of Contents**](toc.md)
* [**Artifacts Summary**](artifacts.md)
* **Ratio (MyHealth@EU)**

## Data Type Profile: Ratio (MyHealth@EU) 

| | |
| :--- | :--- |
| *Official URL*:http://fhir.ehdsi.eu/core/StructureDefinition/Ratio-myhealth | *Version*:1.0.0 |
| Active as of 2026-05-04 | *Computable Name*:RatioMyHealth |

 
This profile of the Ratio data type constraints the Ratio (MyHealth@EU) profile defining a core value set for UCUM. The Ratio (MyHealth@EU) imposes the usage of the UCUM as the code system for units and allows expressing uncertainty of measurement. 

 
This profile of the Ratio data type imposes the usage of the UCUM as the code system for units and allows expressing uncertainty of measurement 

**Usages:**

* Use this DataType Profile: [Observation: Medical Test Result (Core)](StructureDefinition-medicalTestResult-myhealtheu-core.md), [Medication (Core)](StructureDefinition-medication-myhealtheu-core.md), [MedicationRequest (Core)](StructureDefinition-medicationRequest-myhealtheu-core.md) and [MedicationStatement (Core)](StructureDefinition-medicationStatement-myhealtheu-core.md)

You can also check for [usages in the FHIR IG Statistics](https://packages2.fhir.org/xig/myhealth.eu.fhir.core|current/StructureDefinition/Ratio-myhealth)

### Formal Views of Profile Content

 [Description of Profiles, Differentials, Snapshots and how the different presentations work](http://build.fhir.org/ig/FHIR/ig-guidance/readingIgs.html#structure-definitions). 

 

Other representations of profile: [CSV](StructureDefinition-Ratio-myhealth.csv), [Excel](StructureDefinition-Ratio-myhealth.xlsx), [Schematron](StructureDefinition-Ratio-myhealth.sch) 



## Resource Content

```json
{
  "resourceType" : "StructureDefinition",
  "id" : "Ratio-myhealth",
  "url" : "http://fhir.ehdsi.eu/core/StructureDefinition/Ratio-myhealth",
  "version" : "1.0.0",
  "name" : "RatioMyHealth",
  "title" : "Ratio (MyHealth@EU)",
  "status" : "active",
  "date" : "2026-05-04T16:10:59+02:00",
  "publisher" : "MyHealth@Eu",
  "contact" : [{
    "name" : "MyHealth@Eu",
    "telecom" : [{
      "system" : "url",
      "value" : "https://health.ec.europa.eu/other-pages/basic-page/myhealtheu-flyer-addressed-patients-and-health-professionals_en"
    }]
  }],
  "description" : "This profile of the Ratio data type constraints the Ratio (MyHealth@EU) profile defining a core value set for UCUM. The Ratio (MyHealth@EU) imposes the usage of the UCUM as the code system for units and allows expressing uncertainty of measurement.",
  "jurisdiction" : [{
    "coding" : [{
      "system" : "http://unstats.un.org/unsd/methods/m49/m49.htm",
      "code" : "150",
      "display" : "Europe"
    }]
  }],
  "purpose" : "This profile of the Ratio data type imposes the usage of the UCUM as the code system for units and allows expressing uncertainty of measurement",
  "fhirVersion" : "4.0.1",
  "mapping" : [{
    "identity" : "v2",
    "uri" : "http://hl7.org/v2",
    "name" : "HL7 v2 Mapping"
  },
  {
    "identity" : "rim",
    "uri" : "http://hl7.org/v3",
    "name" : "RIM Mapping"
  }],
  "kind" : "complex-type",
  "abstract" : false,
  "type" : "Ratio",
  "baseDefinition" : "http://hl7.org/fhir/StructureDefinition/Ratio",
  "derivation" : "constraint",
  "differential" : {
    "element" : [{
      "id" : "Ratio",
      "path" : "Ratio",
      "short" : "A measured ratio using UCUM",
      "definition" : "A measured ratio (or a ratio that can potentially be measured) and uncertainty of the measurement. This profile imposes that the code system for units be UCUM."
    },
    {
      "id" : "Ratio.extension:uncertainty",
      "path" : "Ratio.extension",
      "sliceName" : "uncertainty",
      "min" : 0,
      "max" : "1",
      "type" : [{
        "code" : "Extension",
        "profile" : ["http://hl7.org/fhir/StructureDefinition/iso21090-uncertainty|5.2.0"]
      }]
    },
    {
      "id" : "Ratio.extension:uncertaintyType",
      "path" : "Ratio.extension",
      "sliceName" : "uncertaintyType",
      "min" : 0,
      "max" : "1",
      "type" : [{
        "code" : "Extension",
        "profile" : ["http://hl7.org/fhir/StructureDefinition/iso21090-uncertaintyType|5.2.0"]
      }]
    },
    {
      "id" : "Ratio.numerator",
      "path" : "Ratio.numerator",
      "short" : "A measured amount using UCUM",
      "type" : [{
        "code" : "Quantity",
        "profile" : ["http://fhir.ehdsi.eu/core/StructureDefinition/Quantity-myhealth"]
      }],
      "mustSupport" : true
    },
    {
      "id" : "Ratio.denominator",
      "path" : "Ratio.denominator",
      "short" : "A measured amount using UCUM",
      "type" : [{
        "code" : "Quantity",
        "profile" : ["http://fhir.ehdsi.eu/core/StructureDefinition/Quantity-myhealth"]
      }],
      "mustSupport" : true
    }]
  }
}

```
