EHDS Logical Information Models
0.2.1 - qa-preview

EHDS Logical Information Models, published by Xt-EHR. This guide is not an authorized publication; it is the continuous build for version 0.2.1 built by the FHIR (HL7® FHIR® Standard) CI Build. This version is based on the current content of https://github.com/Xt-EHR/xt-ehr-common/ and changes regularly. See the Directory of published versions

## Logical Model: Substance model

Official URL: http://www.xt-ehr.eu/fhir/models/StructureDefinition/EHDSSubstance | Version: 0.2.1
Draft as of 2026-02-05 | Computable Name: EHDSSubstance

EHDS refined base model for Substance

Usages:

- Use this Logical Model: Specimen model
- Refer to this Logical Model: Substance model

You can also check for usages in the FHIR IG Statistics

### Formal Views of Profile Content

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

- Key Elements Table
- Differential Table
- Snapshot Table
- Statistics/References
- All

Name | Flags | Card. | Type | Description & Constraints Filter: Bindings Constraints Obligations
--- | --- | --- | --- | ---
EHDSSubstance |  | 0..* | Base | Substance model Instances of this logical model can be the target of a Reference
identifier |  | 0..* | Identifier | Identifier
code |  | 0..* | CodeableConcept | Code Binding Description: (preferred): SNOMED CT
description |  | 0..1 | string | Description
expiry |  | 0..1 | dateTime | Expiry
quantity |  | 0..1 | Quantity | Quantity
ingredients |  | 0..* | Base | Ingredients
quantity |  | 0..1 | Ratio | Quantity
substance |  | 1..1 | Reference(Substance model) | Substance
Documentation for this format

#### Terminology Bindings

Path | Status | Usage | ValueSet | Version | Source
EHDSSubstance.code | Base | preferred |  | Not State | Unknown

This structure is derived from Base

Name | Flags | Card. | Type | Description & Constraints Filter: Bindings Constraints Obligations
--- | --- | --- | --- | ---
EHDSSubstance |  | 0..* | Base | Substance model Instances of this logical model can be the target of a Reference
identifier |  | 0..* | Identifier | Identifier
code |  | 0..* | CodeableConcept | Code Binding Description: (preferred): SNOMED CT
description |  | 0..1 | string | Description
expiry |  | 0..1 | dateTime | Expiry
quantity |  | 0..1 | Quantity | Quantity
ingredients |  | 0..* | Base | Ingredients
quantity |  | 0..1 | Ratio | Quantity
substance |  | 1..1 | Reference(Substance model) | Substance
Documentation for this format

#### Terminology Bindings (Differential)

Path | Status | Usage | ValueSet | Version | Source
EHDSSubstance.code | Base | preferred |  | Not State | Unknown

Name | Flags | Card. | Type | Description & Constraints Filter: Bindings Constraints Obligations
--- | --- | --- | --- | ---
EHDSSubstance |  | 0..* | Base | Substance model Instances of this logical model can be the target of a Reference
identifier |  | 0..* | Identifier | Identifier
code |  | 0..* | CodeableConcept | Code Binding Description: (preferred): SNOMED CT
description |  | 0..1 | string | Description
expiry |  | 0..1 | dateTime | Expiry
quantity |  | 0..1 | Quantity | Quantity
ingredients |  | 0..* | Base | Ingredients
quantity |  | 0..1 | Ratio | Quantity
substance |  | 1..1 | Reference(Substance model) | Substance
Documentation for this format

#### Terminology Bindings

Path | Status | Usage | ValueSet | Version | Source
EHDSSubstance.code | Base | preferred |  | Not State | Unknown

This structure is derived from Base

Summary

Mandatory: 0 element(1 nested mandatory element)

Structures

This structure refers to these other structures:

- Substance model (http://www.xt-ehr.eu/fhir/models/StructureDefinition/EHDSSubstance)

Key Elements View

Name | Flags | Card. | Type | Description & Constraints Filter: Bindings Constraints Obligations
--- | --- | --- | --- | ---
EHDSSubstance |  | 0..* | Base | Substance model Instances of this logical model can be the target of a Reference
identifier |  | 0..* | Identifier | Identifier
code |  | 0..* | CodeableConcept | Code Binding Description: (preferred): SNOMED CT
description |  | 0..1 | string | Description
expiry |  | 0..1 | dateTime | Expiry
quantity |  | 0..1 | Quantity | Quantity
ingredients |  | 0..* | Base | Ingredients
quantity |  | 0..1 | Ratio | Quantity
substance |  | 1..1 | Reference(Substance model) | Substance
Documentation for this format

#### Terminology Bindings

Path | Status | Usage | ValueSet | Version | Source
EHDSSubstance.code | Base | preferred |  | Not State | Unknown

Differential View

This structure is derived from Base

Name | Flags | Card. | Type | Description & Constraints Filter: Bindings Constraints Obligations
--- | --- | --- | --- | ---
EHDSSubstance |  | 0..* | Base | Substance model Instances of this logical model can be the target of a Reference
identifier |  | 0..* | Identifier | Identifier
code |  | 0..* | CodeableConcept | Code Binding Description: (preferred): SNOMED CT
description |  | 0..1 | string | Description
expiry |  | 0..1 | dateTime | Expiry
quantity |  | 0..1 | Quantity | Quantity
ingredients |  | 0..* | Base | Ingredients
quantity |  | 0..1 | Ratio | Quantity
substance |  | 1..1 | Reference(Substance model) | Substance
Documentation for this format

#### Terminology Bindings (Differential)

Path | Status | Usage | ValueSet | Version | Source
EHDSSubstance.code | Base | preferred |  | Not State | Unknown

Snapshot View

Name | Flags | Card. | Type | Description & Constraints Filter: Bindings Constraints Obligations
--- | --- | --- | --- | ---
EHDSSubstance |  | 0..* | Base | Substance model Instances of this logical model can be the target of a Reference
identifier |  | 0..* | Identifier | Identifier
code |  | 0..* | CodeableConcept | Code Binding Description: (preferred): SNOMED CT
description |  | 0..1 | string | Description
expiry |  | 0..1 | dateTime | Expiry
quantity |  | 0..1 | Quantity | Quantity
ingredients |  | 0..* | Base | Ingredients
quantity |  | 0..1 | Ratio | Quantity
substance |  | 1..1 | Reference(Substance model) | Substance
Documentation for this format

#### Terminology Bindings

Path | Status | Usage | ValueSet | Version | Source
EHDSSubstance.code | Base | preferred |  | Not State | Unknown

This structure is derived from Base

Summary

Mandatory: 0 element(1 nested mandatory element)

Structures

This structure refers to these other structures:

- Substance model (http://www.xt-ehr.eu/fhir/models/StructureDefinition/EHDSSubstance)

Other representations of profile: CSV, Excel