# Certified Reference Material: Identifier - HL7 Europe Laboratory Report v2.0.0

* [**Table of Contents**](toc.md)
* [**Artifacts Summary**](artifacts.md)
* **Certified Reference Material: Identifier**

## Extension: Certified Reference Material: Identifier 

| | | |
| :--- | :--- | :--- |
| *Official URL*:http://hl7.eu/fhir/laboratory/StructureDefinition/observation-certifiedRefMaterialIdentifer | *Version*:2.0.0 | |
| * Standards status: *[Trial-use](http://hl7.org/fhir/R4/versions.html#std-process) | [Maturity Level](http://hl7.org/fhir/versions.html#maturity): 2 | *Computable Name*:ObservationCertifiedRefMaterialIdentifer |
| **Copyright/Legal**: Copyright HL7 Europe. Licensed under creative commons public domain (CC0 1.0). | | |

This extension links this observation with the certified reference material used for the calibration. The certified reference material is identified by using an Identifier. This extension should be used when the unit is UCUM [IU].

**Context of Use**

**Usage info**

**Usages:**

* Use this Extension: [Observation Results: laboratory](StructureDefinition-Observation-resultslab-eu-lab.md)
* Examples for this Extension: [Observation/4335db48-7090-45b3-a2c2-45b45f94a67c](Observation-4335db48-7090-45b3-a2c2-45b45f94a67c.md)

You can also check for [usages in the FHIR IG Statistics](https://packages2.fhir.org/xig/hl7.fhir.eu.laboratory|current/StructureDefinition/observation-certifiedRefMaterialIdentifer)

### Formal Views of Extension Content

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

 

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

#### Constraints



## Resource Content

```json
{
  "resourceType" : "StructureDefinition",
  "id" : "observation-certifiedRefMaterialIdentifer",
  "extension" : [{
    "url" : "http://hl7.org/fhir/StructureDefinition/structuredefinition-fmm",
    "valueInteger" : 2
  },
  {
    "url" : "http://hl7.org/fhir/StructureDefinition/structuredefinition-standards-status",
    "valueCode" : "trial-use"
  }],
  "url" : "http://hl7.eu/fhir/laboratory/StructureDefinition/observation-certifiedRefMaterialIdentifer",
  "version" : "2.0.0",
  "name" : "ObservationCertifiedRefMaterialIdentifer",
  "title" : "Certified Reference Material: Identifier",
  "status" : "active",
  "date" : "2026-05-05T16:28:07+02:00",
  "publisher" : "HL7 Europe",
  "contact" : [{
    "name" : "HL7 Europe",
    "telecom" : [{
      "system" : "url",
      "value" : "http://hl7.eu"
    }]
  }],
  "description" : "This extension links this observation with the certified reference material used for the calibration.\nThe certified reference material is identified by using an Identifier.\nThis extension should be used when the unit is UCUM [IU].",
  "jurisdiction" : [{
    "coding" : [{
      "system" : "http://unstats.un.org/unsd/methods/m49/m49.htm",
      "code" : "150",
      "display" : "Europe"
    }]
  }],
  "copyright" : "Copyright HL7 Europe. Licensed under creative commons public domain (CC0 1.0).",
  "fhirVersion" : "4.0.1",
  "mapping" : [{
    "identity" : "rim",
    "uri" : "http://hl7.org/v3",
    "name" : "RIM Mapping"
  }],
  "kind" : "complex-type",
  "abstract" : false,
  "context" : [{
    "type" : "element",
    "expression" : "Observation"
  }],
  "type" : "Extension",
  "baseDefinition" : "http://hl7.org/fhir/StructureDefinition/Extension",
  "derivation" : "constraint",
  "differential" : {
    "element" : [{
      "id" : "Extension",
      "path" : "Extension",
      "short" : "Certified Reference Material: Identifier",
      "definition" : "This extension links this observation with the certified reference material used for the calibration.\nThe certified reference material is identified by using an Identifier.\nThis extension should be used when the unit is UCUM [IU]."
    },
    {
      "id" : "Extension.extension",
      "path" : "Extension.extension",
      "max" : "0"
    },
    {
      "id" : "Extension.url",
      "path" : "Extension.url",
      "fixedUri" : "http://hl7.eu/fhir/laboratory/StructureDefinition/observation-certifiedRefMaterialIdentifer"
    },
    {
      "id" : "Extension.value[x]",
      "path" : "Extension.value[x]",
      "type" : [{
        "code" : "Identifier"
      }]
    }]
  }
}

```
