EHDS Logical Information Models
0.3.0 - qa-preview

EHDS Logical Information Models, published by Xt-EHR. This guide is not an authorized publication; it is the continuous build for version 0.3.0 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: EHDSAllergyIntolerance - Detailed Descriptions

Draft as of 2026-02-09

Definitions for the EHDSAllergyIntolerance logical model.

Guidance on how to interpret the contents of this table can be foundhere

0. EHDSAllergyIntolerance
Definition

Model for allergy or intolerance.


Base definition for all types defined in FHIR type system.

ShortAllergy intolerance modelBase for all types and resources
Control0..*
Is Modifierfalse
Logical ModelInstances of this logical model are not marked to be the target of a Reference
2. EHDSAllergyIntolerance.header
Definition

Basic metadata for this information

ShortBasic metadata for this information
Control1..1
TypeBase
4. EHDSAllergyIntolerance.header.subject
Definition

Patient/subject information

ShortPatient/subject information
Control1..1
Typehttp://www.xt-ehr.eu/fhir/models/StructureDefinition/EHDSPatient
6. EHDSAllergyIntolerance.header.identifier
Definition

Business identifier for the object, unique within its system. Supporting disambiguation between different contexts (systems/countries).

ShortBusiness identifier for the object, unique within its system. Supporting disambiguation between different contexts (systems/countries).
NoteThis is a business identifier, not a resource identifier (see discussion)
Control0..*
TypeIdentifier
8. EHDSAllergyIntolerance.header.author[x]
Definition

The author of the allergy/intolerance information.

ShortThe author of the allergy/intolerance information.
Control0..*
TypeChoice of: http://www.xt-ehr.eu/fhir/models/StructureDefinition/EHDSHealthProfessional, http://www.xt-ehr.eu/fhir/models/StructureDefinition/EHDSOrganisation, http://www.xt-ehr.eu/fhir/models/StructureDefinition/EHDSDevice
[x] NoteSeeChoice of Data Typesfor further information about how to use [x]
10. EHDSAllergyIntolerance.header.date
Definition

Date and optionally time of authoring/issuing

ShortDate and optionally time of authoring/issuing
Control0..1
TypedateTime
Primitive ValueThis primitive element may be present, or absent, or replaced by an extension
12. EHDSAllergyIntolerance.header.status
Definition

Current status of the allergy or intolerance, for example, whether it is active, in remission, resolved, etc.

ShortCurrent status of the allergy or intolerance, for example, whether it is active, in remission, resolved, etc.
Control1..1
Binding

HL7 allergy intolerance status

TypeCodeableConcept
Requirements

eHN PS Guideline, MyHealth@EU, ISO IPS

14. EHDSAllergyIntolerance.header.source
Definition

Source of information (e.g. patient, patient's proxy). Used in case the patient has authored the information or the author has submitted patient-stated information.

ShortSource of information (e.g. patient, patient's proxy). Used in case the patient has authored the information or the author has submitted patient-stated information.
Control0..1
TypeCodeableConcept
16. EHDSAllergyIntolerance.header.language
Definition

Language in which the resource is written. Language is expressed by the IETF language tag.

ShortLanguage in which the resource is written. Language is expressed by the IETF language tag.
Control0..1
Binding

BCP 47

TypeCodeableConcept
18. EHDSAllergyIntolerance.agentOrAllergen
Definition

Code for an allergy or intolerance statement (either a positive or a negated/excluded statement). This may be a code for a substance or pharmaceutical product that is considered to be responsible for the adverse reaction risk (e.g., "Latex"), an allergy or intolerance condition (e.g., "Latex allergy"), or a negated/excluded code for a specific substance or class (e.g., "No latex allergy") It must be clinically safe to only process the 'code' and ignore the 'reaction.substance'.

ShortCode that identifies the allergy or intolerance
Control1..1
Binding

ATC, EMA SPOR SMS, SNOMED CT

TypeCodeableConcept
Requirements

eHN PS Guideline, MyHealth@EU, ISO IPS

20. EHDSAllergyIntolerance.note
Definition

Additional information about the allergy or intolerance

ShortAdditional information about the allergy or intolerance
Control0..1
Typestring
Primitive ValueThis primitive element may be present, or absent, or replaced by an extension
Requirements

eHN PS Guideline, ISO IPS

22. EHDSAllergyIntolerance.criticality
Definition

Estimate of the potential clinical harm, or seriousness, of a reaction to an identified substance.

ShortEstimate of the potential clinical harm, or seriousness, of a reaction to an identified substance.
Control0..1
Binding

HL7 allergy intolerance criticality

TypeCodeableConcept
Requirements

eHN PS Guideline, MyHealth@EU, ISO IPS

24. EHDSAllergyIntolerance.certainty
Definition

Assertion about the certainty associated with a propensity, or potential risk, of a reaction to the identified substance. Diagnostic and /or clinical evidence of condition

ShortAssertion about the certainty associated with a propensity, or potential risk, of a reaction to the identified substance. Diagnostic and /or clinical evidence of condition
Control0..1
Binding

HL7 allergy intolerance verification

TypeCodeableConcept
Requirements

eHN PS Guideline, MyHealth@EU, ISO IPS

26. EHDSAllergyIntolerance.onsetDate
Definition

When allergy or intolerance was identified

ShortWhen allergy or intolerance was identified
Control0..1
TypedateTime
Primitive ValueThis primitive element may be present, or absent, or replaced by an extension
Requirements

MyHealth@EU, ISO IPS

28. EHDSAllergyIntolerance.endDate
Definition

Date of resolution of the allergy (e.g. when the clinician deemed there is no longer any need to track the underlying condition)

ShortDate of resolution of the allergy (e.g. when the clinician deemed there is no longer any need to track the underlying condition)
Control0..1
TypedateTime
Primitive ValueThis primitive element may be present, or absent, or replaced by an extension
Requirements

eHN PS Guideline, MyHealth@EU, ISO IPS

30. EHDSAllergyIntolerance.reaction
Definition

Adverse reaction events linked to exposure to substance.

ShortAdverse reaction events linked to exposure to substance.
Control0..*
TypeBase
Requirements

ISO IPS (explicit), implicitly in eHN PS Guideline, MH@EU

32. EHDSAllergyIntolerance.reaction.agentOrAllergen
Definition

Identification of the specific substance (or pharmaceutical product) considered to be responsible for the Adverse Reaction event. Note: the substance for a specific reaction may be different from the substance identified as the cause of the risk, but it must be consistent with it.
It must be clinically safe to only process the 'code' and ignore the 'reaction.substance'.

ShortSpecific substance or pharmaceutical product considered to be responsible for event
Control0..1
TypeCodeableConcept
34. EHDSAllergyIntolerance.reaction.manifestation
Definition

Description of the clinical manifestation of the allergic reaction. Example: anaphylactic shock, angioedema. (the clinical manifestation also gives information about the severity of the observed reaction).

ShortDescription of the clinical manifestation of the allergic reaction. Example: anaphylactic shock, angioedema. (the clinical manifestation also gives information about the severity of the observed reaction).
Control0..*
Binding

ICD-10, SNOMED CT

TypeCodeableConcept
Requirements

The element is present in eHN PS GL, MyHealth@EU specifications and ISO IPS. Element name and description is taken from eHN PS GL. Cardinality in MyHealth@EU for this element, used here, is one manifestation per severity and onset, while the cardinality in FHIR IPS IG allows multiple manifestations per severity and onset.

36. EHDSAllergyIntolerance.reaction.severity
Definition

Severity of the clinical manifestation of the allergic reaction.

ShortSeverity of the clinical manifestation of the allergic reaction.
Control0..1
Binding

SNOMED CT, HL7 reaction event severity

TypeCodeableConcept
Requirements

The element is present in eHN PS GL, MyHealth@EU specifications and ISO IPS. Element name and description is taken from eHN PS GL.

38. EHDSAllergyIntolerance.reaction.onset
Definition

Date and time of the onset of the reaction

ShortDate and time of the onset of the reaction
Control0..1
TypedateTime
Primitive ValueThis primitive element may be present, or absent, or replaced by an extension
Requirements

The element is present in eHN PS GL. Element name and description is taken from eHN PS GL.

Guidance on how to interpret the contents of this table can be foundhere

0. EHDSAllergyIntolerance
Definition

Model for allergy or intolerance.

ShortAllergy intolerance model
Logical ModelInstances of this logical model are not marked to be the target of a Reference
2. EHDSAllergyIntolerance.header
4. EHDSAllergyIntolerance.header.author[x]
Definition

The author of the allergy/intolerance information.

ShortThe author of the allergy/intolerance information.
[x] NoteSeeChoice of Data Typesfor further information about how to use [x]
6. EHDSAllergyIntolerance.header.status
Definition

Current status of the allergy or intolerance, for example, whether it is active, in remission, resolved, etc.

ShortCurrent status of the allergy or intolerance, for example, whether it is active, in remission, resolved, etc.
Binding

HL7 allergy intolerance status

Requirements

eHN PS Guideline, MyHealth@EU, ISO IPS

8. EHDSAllergyIntolerance.agentOrAllergen
Definition

Code for an allergy or intolerance statement (either a positive or a negated/excluded statement). This may be a code for a substance or pharmaceutical product that is considered to be responsible for the adverse reaction risk (e.g., "Latex"), an allergy or intolerance condition (e.g., "Latex allergy"), or a negated/excluded code for a specific substance or class (e.g., "No latex allergy") It must be clinically safe to only process the 'code' and ignore the 'reaction.substance'.

ShortCode that identifies the allergy or intolerance
Control1..1
Binding

ATC, EMA SPOR SMS, SNOMED CT

TypeCodeableConcept
Requirements

eHN PS Guideline, MyHealth@EU, ISO IPS

10. EHDSAllergyIntolerance.note
Definition

Additional information about the allergy or intolerance

ShortAdditional information about the allergy or intolerance
Control0..1
Typestring
Primitive ValueThis primitive element may be present, or absent, or replaced by an extension
Requirements

eHN PS Guideline, ISO IPS

12. EHDSAllergyIntolerance.criticality
Definition

Estimate of the potential clinical harm, or seriousness, of a reaction to an identified substance.

ShortEstimate of the potential clinical harm, or seriousness, of a reaction to an identified substance.
Control0..1
Binding

HL7 allergy intolerance criticality

TypeCodeableConcept
Requirements

eHN PS Guideline, MyHealth@EU, ISO IPS

14. EHDSAllergyIntolerance.certainty
Definition

Assertion about the certainty associated with a propensity, or potential risk, of a reaction to the identified substance. Diagnostic and /or clinical evidence of condition

ShortAssertion about the certainty associated with a propensity, or potential risk, of a reaction to the identified substance. Diagnostic and /or clinical evidence of condition
Control0..1
Binding

HL7 allergy intolerance verification

TypeCodeableConcept
Requirements

eHN PS Guideline, MyHealth@EU, ISO IPS

16. EHDSAllergyIntolerance.onsetDate
Definition

When allergy or intolerance was identified

ShortWhen allergy or intolerance was identified
Control0..1
TypedateTime
Primitive ValueThis primitive element may be present, or absent, or replaced by an extension
Requirements

MyHealth@EU, ISO IPS

18. EHDSAllergyIntolerance.endDate
Definition

Date of resolution of the allergy (e.g. when the clinician deemed there is no longer any need to track the underlying condition)

ShortDate of resolution of the allergy (e.g. when the clinician deemed there is no longer any need to track the underlying condition)
Control0..1
TypedateTime
Primitive ValueThis primitive element may be present, or absent, or replaced by an extension
Requirements

eHN PS Guideline, MyHealth@EU, ISO IPS

20. EHDSAllergyIntolerance.reaction
Definition

Adverse reaction events linked to exposure to substance.

ShortAdverse reaction events linked to exposure to substance.
Control0..*
TypeBase
Requirements

ISO IPS (explicit), implicitly in eHN PS Guideline, MH@EU

22. EHDSAllergyIntolerance.reaction.agentOrAllergen
Definition

Identification of the specific substance (or pharmaceutical product) considered to be responsible for the Adverse Reaction event. Note: the substance for a specific reaction may be different from the substance identified as the cause of the risk, but it must be consistent with it.
It must be clinically safe to only process the 'code' and ignore the 'reaction.substance'.

ShortSpecific substance or pharmaceutical product considered to be responsible for event
Control0..1
TypeCodeableConcept
24. EHDSAllergyIntolerance.reaction.manifestation
Definition

Description of the clinical manifestation of the allergic reaction. Example: anaphylactic shock, angioedema. (the clinical manifestation also gives information about the severity of the observed reaction).

ShortDescription of the clinical manifestation of the allergic reaction. Example: anaphylactic shock, angioedema. (the clinical manifestation also gives information about the severity of the observed reaction).
Control0..*
Binding

ICD-10, SNOMED CT

TypeCodeableConcept
Requirements

The element is present in eHN PS GL, MyHealth@EU specifications and ISO IPS. Element name and description is taken from eHN PS GL. Cardinality in MyHealth@EU for this element, used here, is one manifestation per severity and onset, while the cardinality in FHIR IPS IG allows multiple manifestations per severity and onset.

26. EHDSAllergyIntolerance.reaction.severity
Definition

Severity of the clinical manifestation of the allergic reaction.

ShortSeverity of the clinical manifestation of the allergic reaction.
Control0..1
Binding

SNOMED CT, HL7 reaction event severity

TypeCodeableConcept
Requirements

The element is present in eHN PS GL, MyHealth@EU specifications and ISO IPS. Element name and description is taken from eHN PS GL.

28. EHDSAllergyIntolerance.reaction.onset
Definition

Date and time of the onset of the reaction

ShortDate and time of the onset of the reaction
Control0..1
TypedateTime
Primitive ValueThis primitive element may be present, or absent, or replaced by an extension
Requirements

The element is present in eHN PS GL. Element name and description is taken from eHN PS GL.

Guidance on how to interpret the contents of this table can be foundhere

0. EHDSAllergyIntolerance
Definition

Model for allergy or intolerance.

ShortAllergy intolerance model
Control0..*
Is Modifierfalse
Logical ModelInstances of this logical model are not marked to be the target of a Reference
2. EHDSAllergyIntolerance.header
Definition

Basic metadata for this information

ShortBasic metadata for this information
Control1..1
TypeBase
4. EHDSAllergyIntolerance.header.subject
Definition

Patient/subject information

ShortPatient/subject information
Control1..1
Typehttp://www.xt-ehr.eu/fhir/models/StructureDefinition/EHDSPatient
6. EHDSAllergyIntolerance.header.identifier
Definition

Business identifier for the object, unique within its system. Supporting disambiguation between different contexts (systems/countries).

ShortBusiness identifier for the object, unique within its system. Supporting disambiguation between different contexts (systems/countries).
NoteThis is a business identifier, not a resource identifier (see discussion)
Control0..*
TypeIdentifier
8. EHDSAllergyIntolerance.header.author[x]
Definition

The author of the allergy/intolerance information.

ShortThe author of the allergy/intolerance information.
Control0..*
TypeChoice of: http://www.xt-ehr.eu/fhir/models/StructureDefinition/EHDSHealthProfessional, http://www.xt-ehr.eu/fhir/models/StructureDefinition/EHDSOrganisation, http://www.xt-ehr.eu/fhir/models/StructureDefinition/EHDSDevice
[x] NoteSeeChoice of Data Typesfor further information about how to use [x]
10. EHDSAllergyIntolerance.header.date
Definition

Date and optionally time of authoring/issuing

ShortDate and optionally time of authoring/issuing
Control0..1
TypedateTime
Primitive ValueThis primitive element may be present, or absent, or replaced by an extension
12. EHDSAllergyIntolerance.header.status
Definition

Current status of the allergy or intolerance, for example, whether it is active, in remission, resolved, etc.

ShortCurrent status of the allergy or intolerance, for example, whether it is active, in remission, resolved, etc.
Control1..1
Binding

HL7 allergy intolerance status

TypeCodeableConcept
Requirements

eHN PS Guideline, MyHealth@EU, ISO IPS

14. EHDSAllergyIntolerance.header.source
Definition

Source of information (e.g. patient, patient's proxy). Used in case the patient has authored the information or the author has submitted patient-stated information.

ShortSource of information (e.g. patient, patient's proxy). Used in case the patient has authored the information or the author has submitted patient-stated information.
Control0..1
TypeCodeableConcept
16. EHDSAllergyIntolerance.header.language
Definition

Language in which the resource is written. Language is expressed by the IETF language tag.

ShortLanguage in which the resource is written. Language is expressed by the IETF language tag.
Control0..1
Binding

BCP 47

TypeCodeableConcept
18. EHDSAllergyIntolerance.agentOrAllergen
Definition

Code for an allergy or intolerance statement (either a positive or a negated/excluded statement). This may be a code for a substance or pharmaceutical product that is considered to be responsible for the adverse reaction risk (e.g., "Latex"), an allergy or intolerance condition (e.g., "Latex allergy"), or a negated/excluded code for a specific substance or class (e.g., "No latex allergy") It must be clinically safe to only process the 'code' and ignore the 'reaction.substance'.

ShortCode that identifies the allergy or intolerance
Control1..1
Binding

ATC, EMA SPOR SMS, SNOMED CT

TypeCodeableConcept
Requirements

eHN PS Guideline, MyHealth@EU, ISO IPS

20. EHDSAllergyIntolerance.note
Definition

Additional information about the allergy or intolerance

ShortAdditional information about the allergy or intolerance
Control0..1
Typestring
Primitive ValueThis primitive element may be present, or absent, or replaced by an extension
Requirements

eHN PS Guideline, ISO IPS

22. EHDSAllergyIntolerance.criticality
Definition

Estimate of the potential clinical harm, or seriousness, of a reaction to an identified substance.

ShortEstimate of the potential clinical harm, or seriousness, of a reaction to an identified substance.
Control0..1
Binding

HL7 allergy intolerance criticality

TypeCodeableConcept
Requirements

eHN PS Guideline, MyHealth@EU, ISO IPS

24. EHDSAllergyIntolerance.certainty
Definition

Assertion about the certainty associated with a propensity, or potential risk, of a reaction to the identified substance. Diagnostic and /or clinical evidence of condition

ShortAssertion about the certainty associated with a propensity, or potential risk, of a reaction to the identified substance. Diagnostic and /or clinical evidence of condition
Control0..1
Binding

HL7 allergy intolerance verification

TypeCodeableConcept
Requirements

eHN PS Guideline, MyHealth@EU, ISO IPS

26. EHDSAllergyIntolerance.onsetDate
Definition

When allergy or intolerance was identified

ShortWhen allergy or intolerance was identified
Control0..1
TypedateTime
Primitive ValueThis primitive element may be present, or absent, or replaced by an extension
Requirements

MyHealth@EU, ISO IPS

28. EHDSAllergyIntolerance.endDate
Definition

Date of resolution of the allergy (e.g. when the clinician deemed there is no longer any need to track the underlying condition)

ShortDate of resolution of the allergy (e.g. when the clinician deemed there is no longer any need to track the underlying condition)
Control0..1
TypedateTime
Primitive ValueThis primitive element may be present, or absent, or replaced by an extension
Requirements

eHN PS Guideline, MyHealth@EU, ISO IPS

30. EHDSAllergyIntolerance.reaction
Definition

Adverse reaction events linked to exposure to substance.

ShortAdverse reaction events linked to exposure to substance.
Control0..*
TypeBase
Requirements

ISO IPS (explicit), implicitly in eHN PS Guideline, MH@EU

32. EHDSAllergyIntolerance.reaction.agentOrAllergen
Definition

Identification of the specific substance (or pharmaceutical product) considered to be responsible for the Adverse Reaction event. Note: the substance for a specific reaction may be different from the substance identified as the cause of the risk, but it must be consistent with it.
It must be clinically safe to only process the 'code' and ignore the 'reaction.substance'.

ShortSpecific substance or pharmaceutical product considered to be responsible for event
Control0..1
TypeCodeableConcept
34. EHDSAllergyIntolerance.reaction.manifestation
Definition

Description of the clinical manifestation of the allergic reaction. Example: anaphylactic shock, angioedema. (the clinical manifestation also gives information about the severity of the observed reaction).

ShortDescription of the clinical manifestation of the allergic reaction. Example: anaphylactic shock, angioedema. (the clinical manifestation also gives information about the severity of the observed reaction).
Control0..*
Binding

ICD-10, SNOMED CT

TypeCodeableConcept
Requirements

The element is present in eHN PS GL, MyHealth@EU specifications and ISO IPS. Element name and description is taken from eHN PS GL. Cardinality in MyHealth@EU for this element, used here, is one manifestation per severity and onset, while the cardinality in FHIR IPS IG allows multiple manifestations per severity and onset.

36. EHDSAllergyIntolerance.reaction.severity
Definition

Severity of the clinical manifestation of the allergic reaction.

ShortSeverity of the clinical manifestation of the allergic reaction.
Control0..1
Binding

SNOMED CT, HL7 reaction event severity

TypeCodeableConcept
Requirements

The element is present in eHN PS GL, MyHealth@EU specifications and ISO IPS. Element name and description is taken from eHN PS GL.

38. EHDSAllergyIntolerance.reaction.onset
Definition

Date and time of the onset of the reaction

ShortDate and time of the onset of the reaction
Control0..1
TypedateTime
Primitive ValueThis primitive element may be present, or absent, or replaced by an extension
Requirements

The element is present in eHN PS GL. Element name and description is taken from eHN PS GL.