Diagram of Observation

  • Version 3
  • Published
  • Updated

Use the + and − buttons to zoom, and drag the diagram to pan. Select a class box to open its detail page.

UML 2.1 notation shows multiplicity on relationship ends; coloured boxes indicate classes elaborated in a separate diagram or planned for a future release.

Observation Subject Area Generic Representation Pan-Canadian Health Data Content Framework Version 3, September 2026 Observation Clinical Event - Observation Body Site Code: Codeable Concept [0..1] - Observation Category Code: Codeable Concept [0..1] - Observation Code: Codeable Concept - Observation Date Time: Date Time - Observation Interpretation Type Code: Codeable Concept [0..*] - Observation Measurement Method Code: Codeable Concept [0..1] - Observation Measurement Type Code: Codeable Concept [0..1] - Observation Status Code: Codeable Concept [0..1] - Observation Value Code: Codeable Concept [0..1] - Observation Value Date Time: Date Time [0..1] - Observation Value Description: String [0..1] - Observation Value Indicator: Indicator [0..1] - Observation Value Integer: Integer [0..1] - Observation Value Period: Period [0..1] - Observation Value Quantity: Quantity [0..1] - Observation Value Range: Range [0..1] - Observation Value Ratio: Ratio [0..1] - Observation Value Sampled Data: Sampled Data [0..1] - Observation Value Time: Time [0..1] constraints {Unique Key: XOR (Patient, Party Group, Organization, Location, Standardized Assessment, Device), Observation Code, Observation Date Time} {XOR("Observation Value *" attributes) } Patient Observation Reference Range - Reference Range Age Code: Codeable Concept [0..1] - Reference Range Description: String [0..1] - Reference Range Type Code: Codeable Concept [0..1] - Reference Range Value: Range [0..1] - Target Population Code: Codeable Concept [0..*] constraints {Unique Key: XOR(Observation, Observation Component), XOR(Reference Range Value, Reference Age Range Code)} Observation Component - Observation Component Code: Codeable Concept - Observation Component Interpretation Type Code: Codeable Concept [0..*] - Observation Component Value Code: Codeable Concept [0..1] - Observation Component Value Date Time: Date Time [0..1] - Observation Component Value Description: String [0..1] - Observation Component Value Indicator: Indicator [0..1] - Observation Component Value Integer: Integer [0..1] - Observation Component Value Period: Period [0..1] - Observation Component Value Quantity: Quantity [0..1] - Observation Component Value Range: Range [0..1] - Observation Component Value Ratio: Ratio [0..1] - Observation Component Value Sampled Data: Sampled Data [0..1] - Observation Component Value Time: Time [0..1] constraints {Unique Key: Observation, Observation Component Code} {XOR("Observation Component Value *" attributes) } Party Role Organization Party Location Party Group Party Device Party Clinical Annotation Observation Data Absent Reason - Observation Code: Codeable Concept [0..1] - Observation Data Absent Reason Code: Codeable Concept - Observation Date Time: Date Time [0..1] constraints {Unique Key: XOR (Patient, Party Group, Organization, Location, Standardized Assessment, Device), Observation Code if specified, Observation Date Time if specified} Clinical Information LifeCycle Event Administrative Event Clinical Document StandardizedAssessment Assessment 0..* 0..1 0..* 0..* has 0..1 0..* performer 0..1 0..* subject of 0..* 0..1 executed by 0..* 0..* 0..1 0..* subject of 0..* 0..1 generated by 0..1 subject of 0..* 0..1 for 0..* 0..* derived from 0..* 0..1 for 0..* 0..1 for 0..* 0..1 for 0..1 0..* subject of 0..* 0..1 for 0..1 0..* subject of 0..* 0..1 for 0..* 0..1 observation performer 0..1 0..* subject of 0..* Exclusive OR Exclusive OR Exclusive OR Legend Class Elaborated in Separate Diagram Future Release Business Representation Association relationship Uses relationship Relationship to association class Exclusive OR boundary | Inclusive OR boundary Generalization relationship from child to parent Aggregation relationship Composition relationship

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How to cite:

Canadian Institute for Health Information. Diagram of Observation. Accessed November 02, 2026.

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