# Observation - Medtech ALEX® AU Implementation Guide v1.0.0

* [**Table of Contents**](toc.md)
* [**Artifacts Summary**](artifacts.md)
* **Observation**

## Resource Profile: Observation 

| | |
| :--- | :--- |
| *Official URL*:https://alexapi.medtechglobal.com.au/fhir/StructureDefinition/alex-observation | *Version*:1.0.0 |
| Active as of 2026-01-12 | *Computable Name*:AlexObservation |

 
The observation exposed by ALEX. 

**Usages:**

* Derived from this Profile: [Observation IPS Profile](StructureDefinition-alex-observation-ips.md)
* Use this Profile: [Observation Bundle](StructureDefinition-observation-search-bundle.md)
* Examples for this Profile: [Observation/observation-full-example](Observation-observation-full-example.md) and [Observation/observation-min-example](Observation-observation-min-example.md)

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

### 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-alex-observation.csv), [Excel](StructureDefinition-alex-observation.xlsx), [Schematron](StructureDefinition-alex-observation.sch) 



## Resource Content

```json
{
  "resourceType" : "StructureDefinition",
  "id" : "alex-observation",
  "url" : "https://alexapi.medtechglobal.com.au/fhir/StructureDefinition/alex-observation",
  "version" : "1.0.0",
  "name" : "AlexObservation",
  "title" : "Observation",
  "status" : "active",
  "date" : "2026-01-12T22:43:00+00:00",
  "publisher" : "Medtech Global",
  "contact" : [
    {
      "name" : "Medtech Global",
      "telecom" : [
        {
          "system" : "url",
          "value" : "https://medtechglobal.com/au/"
        },
        {
          "system" : "email",
          "value" : "supportau@medtechglobal.com"
        }
      ]
    },
    {
      "name" : "Medtech Support",
      "telecom" : [
        {
          "system" : "email",
          "value" : "supportau@medtechglobal.com",
          "use" : "work"
        }
      ]
    }
  ],
  "description" : "The observation exposed by ALEX.",
  "jurisdiction" : [
    {
      "coding" : [
        {
          "system" : "http://unstats.un.org/unsd/methods/m49/m49.htm",
          "code" : "001",
          "display" : "World"
        }
      ]
    }
  ],
  "fhirVersion" : "4.0.1",
  "mapping" : [
    {
      "identity" : "workflow",
      "uri" : "http://hl7.org/fhir/workflow",
      "name" : "Workflow Pattern"
    },
    {
      "identity" : "sct-concept",
      "uri" : "http://snomed.info/conceptdomain",
      "name" : "SNOMED CT Concept Domain Binding"
    },
    {
      "identity" : "v2",
      "uri" : "http://hl7.org/v2",
      "name" : "HL7 v2 Mapping"
    },
    {
      "identity" : "rim",
      "uri" : "http://hl7.org/v3",
      "name" : "RIM Mapping"
    },
    {
      "identity" : "w5",
      "uri" : "http://hl7.org/fhir/fivews",
      "name" : "FiveWs Pattern Mapping"
    },
    {
      "identity" : "sct-attr",
      "uri" : "http://snomed.org/attributebinding",
      "name" : "SNOMED CT Attribute Binding"
    }
  ],
  "kind" : "resource",
  "abstract" : false,
  "type" : "Observation",
  "baseDefinition" : "http://hl7.org/fhir/StructureDefinition/Observation",
  "derivation" : "constraint",
  "differential" : {
    "element" : [
      {
        "id" : "Observation",
        "path" : "Observation",
        "constraint" : [
          {
            "key" : "observation-code-text-length",
            "severity" : "error",
            "human" : "Code.text cannot be more than 30 characters",
            "expression" : "code.text.empty() or code.text.length() <= 30",
            "source" : "https://alexapi.medtechglobal.com.au/fhir/StructureDefinition/alex-observation"
          },
          {
            "key" : "observation-note-text-length",
            "severity" : "error",
            "human" : "Note - text size validation",
            "expression" : "note.text.empty() or note.text.length() <= 4096",
            "source" : "https://alexapi.medtechglobal.com.au/fhir/StructureDefinition/alex-observation"
          }
        ]
      },
      {
        "id" : "Observation.meta.security",
        "path" : "Observation.meta.security",
        "binding" : {
          "strength" : "required",
          "valueSet" : "https://alexapi.medtechglobal.com.au/fhir/ValueSet/confidentiality"
        }
      },
      {
        "id" : "Observation.implicitRules",
        "path" : "Observation.implicitRules",
        "max" : "0"
      },
      {
        "id" : "Observation.language",
        "path" : "Observation.language",
        "max" : "0"
      },
      {
        "id" : "Observation.contained",
        "path" : "Observation.contained",
        "max" : "0"
      },
      {
        "id" : "Observation.identifier",
        "path" : "Observation.identifier",
        "max" : "0"
      },
      {
        "id" : "Observation.status",
        "path" : "Observation.status",
        "patternCode" : "final"
      },
      {
        "id" : "Observation.category",
        "path" : "Observation.category",
        "max" : "0"
      },
      {
        "id" : "Observation.code",
        "path" : "Observation.code",
        "mustSupport" : true,
        "binding" : {
          "strength" : "extensible",
          "valueSet" : "https://alexapi.medtechglobal.com.au/fhir/ValueSet/screening-term"
        }
      },
      {
        "id" : "Observation.code.coding.system",
        "path" : "Observation.code.coding.system",
        "patternUri" : "https://alexapi.medtechglobal.com.au/fhir/CodeSystem/screening-term"
      },
      {
        "id" : "Observation.code.text",
        "path" : "Observation.code.text",
        "min" : 1,
        "mustSupport" : true
      },
      {
        "id" : "Observation.subject",
        "path" : "Observation.subject",
        "min" : 1,
        "mustSupport" : true
      },
      {
        "id" : "Observation.subject.reference",
        "path" : "Observation.subject.reference",
        "short" : "Reference to Patient resource",
        "min" : 1,
        "mustSupport" : true
      },
      {
        "id" : "Observation.subject.display",
        "path" : "Observation.subject.display",
        "short" : "External Name of Patient"
      },
      {
        "id" : "Observation.encounter",
        "path" : "Observation.encounter",
        "max" : "0"
      },
      {
        "id" : "Observation.effective[x]",
        "path" : "Observation.effective[x]",
        "slicing" : {
          "discriminator" : [
            {
              "type" : "type",
              "path" : "$this"
            }
          ],
          "ordered" : false,
          "rules" : "open"
        },
        "min" : 1
      },
      {
        "id" : "Observation.effective[x]:effectiveInstant",
        "path" : "Observation.effective[x]",
        "sliceName" : "effectiveInstant",
        "min" : 1,
        "max" : "1",
        "type" : [
          {
            "code" : "instant"
          }
        ],
        "mustSupport" : true
      },
      {
        "id" : "Observation.performer",
        "path" : "Observation.performer",
        "min" : 1,
        "max" : "1",
        "mustSupport" : true
      },
      {
        "id" : "Observation.performer.reference",
        "path" : "Observation.performer.reference",
        "short" : "Reference to Practitioner resource",
        "min" : 1,
        "mustSupport" : true
      },
      {
        "id" : "Observation.performer.display",
        "path" : "Observation.performer.display",
        "short" : "External Name of Practitioner"
      },
      {
        "id" : "Observation.value[x]",
        "path" : "Observation.value[x]",
        "slicing" : {
          "discriminator" : [
            {
              "type" : "type",
              "path" : "$this"
            }
          ],
          "ordered" : false,
          "rules" : "open"
        },
        "type" : [
          {
            "code" : "Quantity"
          },
          {
            "code" : "string"
          },
          {
            "code" : "dateTime"
          }
        ]
      },
      {
        "id" : "Observation.value[x]:valueString",
        "path" : "Observation.value[x]",
        "sliceName" : "valueString",
        "min" : 0,
        "max" : "1",
        "type" : [
          {
            "code" : "string"
          }
        ],
        "mustSupport" : true
      },
      {
        "id" : "Observation.value[x]:valueQuantity",
        "path" : "Observation.value[x]",
        "sliceName" : "valueQuantity",
        "min" : 0,
        "max" : "1",
        "type" : [
          {
            "code" : "Quantity"
          }
        ]
      },
      {
        "id" : "Observation.value[x]:valueQuantity.value",
        "path" : "Observation.value[x].value",
        "min" : 1,
        "mustSupport" : true
      },
      {
        "id" : "Observation.value[x]:valueQuantity.system",
        "path" : "Observation.value[x].system",
        "patternUri" : "https://alexapi.medtechglobal.com.au/fhir/CodeSystem/value-quantity-unit"
      },
      {
        "id" : "Observation.value[x]:valueQuantity.code",
        "path" : "Observation.value[x].code",
        "binding" : {
          "strength" : "extensible",
          "valueSet" : "https://alexapi.medtechglobal.com.au/fhir/ValueSet/value-quantity-unit"
        }
      },
      {
        "id" : "Observation.value[x]:valueDateTime",
        "path" : "Observation.value[x]",
        "sliceName" : "valueDateTime",
        "min" : 0,
        "max" : "1",
        "type" : [
          {
            "code" : "dateTime"
          }
        ],
        "mustSupport" : true
      },
      {
        "id" : "Observation.interpretation",
        "path" : "Observation.interpretation",
        "mustSupport" : true,
        "binding" : {
          "strength" : "extensible",
          "valueSet" : "https://alexapi.medtechglobal.com.au/fhir/ValueSet/observation-interpretation"
        }
      },
      {
        "id" : "Observation.interpretation.coding",
        "path" : "Observation.interpretation.coding",
        "min" : 1
      },
      {
        "id" : "Observation.interpretation.coding.system",
        "path" : "Observation.interpretation.coding.system",
        "min" : 1,
        "patternUri" : "https://alexapi.medtechglobal.com.au/fhir/CodeSystem/observation-interpretation",
        "mustSupport" : true
      },
      {
        "id" : "Observation.interpretation.coding.code",
        "path" : "Observation.interpretation.coding.code",
        "min" : 1,
        "mustSupport" : true
      },
      {
        "id" : "Observation.interpretation.text",
        "path" : "Observation.interpretation.text",
        "mustSupport" : true
      },
      {
        "id" : "Observation.note",
        "path" : "Observation.note",
        "mustSupport" : true
      },
      {
        "id" : "Observation.note.text",
        "path" : "Observation.note.text",
        "mustSupport" : true
      },
      {
        "id" : "Observation.bodySite",
        "path" : "Observation.bodySite",
        "max" : "0"
      },
      {
        "id" : "Observation.component",
        "path" : "Observation.component",
        "mustSupport" : true
      },
      {
        "id" : "Observation.component.code",
        "path" : "Observation.component.code",
        "mustSupport" : true,
        "binding" : {
          "strength" : "preferred",
          "valueSet" : "https://alexapi.medtechglobal.com.au/fhir/ValueSet/measurement-prompt"
        }
      },
      {
        "id" : "Observation.component.code.coding.system",
        "path" : "Observation.component.code.coding.system",
        "patternUri" : "https://alexapi.medtechglobal.com.au/fhir/CodeSystem/measurement-prompt"
      },
      {
        "id" : "Observation.component.value[x]",
        "path" : "Observation.component.value[x]",
        "slicing" : {
          "discriminator" : [
            {
              "type" : "type",
              "path" : "$this"
            }
          ],
          "ordered" : false,
          "rules" : "open"
        },
        "type" : [
          {
            "code" : "Quantity"
          },
          {
            "code" : "string"
          },
          {
            "code" : "dateTime"
          }
        ]
      },
      {
        "id" : "Observation.component.value[x]:valueString",
        "path" : "Observation.component.value[x]",
        "sliceName" : "valueString",
        "min" : 0,
        "max" : "1",
        "type" : [
          {
            "code" : "string"
          }
        ],
        "mustSupport" : true
      },
      {
        "id" : "Observation.component.value[x]:valueQuantity",
        "path" : "Observation.component.value[x]",
        "sliceName" : "valueQuantity",
        "min" : 0,
        "max" : "1",
        "type" : [
          {
            "code" : "Quantity"
          }
        ]
      },
      {
        "id" : "Observation.component.value[x]:valueQuantity.value",
        "path" : "Observation.component.value[x].value",
        "min" : 1,
        "mustSupport" : true
      },
      {
        "id" : "Observation.component.value[x]:valueQuantity.system",
        "path" : "Observation.component.value[x].system",
        "patternUri" : "https://alexapi.medtechglobal.com.au/fhir/CodeSystem/value-quantity-unit"
      },
      {
        "id" : "Observation.component.value[x]:valueQuantity.code",
        "path" : "Observation.component.value[x].code",
        "binding" : {
          "strength" : "extensible",
          "valueSet" : "https://alexapi.medtechglobal.com.au/fhir/ValueSet/value-quantity-unit"
        }
      },
      {
        "id" : "Observation.component.value[x]:valueDateTime",
        "path" : "Observation.component.value[x]",
        "sliceName" : "valueDateTime",
        "min" : 0,
        "max" : "1",
        "type" : [
          {
            "code" : "dateTime"
          }
        ],
        "mustSupport" : true
      }
    ]
  }
}

```
