HL7 Europe Patient Summary
1.0.0-ci-build - ci-build 150

HL7 Europe Patient Summary, published by HL7 Europe. This guide is not an authorized publication; it is the continuous build for version 1.0.0-ci-build built by the FHIR (HL7® FHIR® Standard) CI Build. This version is based on the current content of https://github.com/hl7-eu/eps/ and changes regularly. See the Directory of published versions

## IPS to EPS Allergy Comparison

ISO 27269 ↔ EU Patient Summary – Allergies and Intolerances Mapping

### 📘 ISO 27269 → EU Patient Summary — Allergies and Intolerances

ISO 27269 (IPS) | Conformance | Relationship | EU Patient Summary
--- | --- | --- | ---
Element | Conf. | Relation | Element | Notes
Allergies/Intolerances content status | C | Equivalent | section.emptyReason | Same purpose; the eu ps model is closer to the way FHIR IPS implements this
Allergies and Intolerances | C | Equivalent | allergyIntolerance (list) | Represents the list of allergy/intolerance entries.
Allergy/Intolerance | M | Equivalent | allergyIntolerance | Core entry element; identical concept.
Allergy/Intolerance description | R | Equivalent | description | Free text description; same use.
Clinical status | R | Equivalent | status | Same meaning; coded element.
Onset date | RK | Equivalent | onsetDate | Same element; optional with known qualifier.
End date | C | Equivalent | endDate | Same semantics; optional/conditional in both.
Criticality | O | Equivalent | criticality | Optional coded element; identical use.
Certainty | O | Equivalent | certainty | Present in both;
Type of propensity | RK | Equivalent | typeOfPropensity | Same; differentiates allergy vs intolerance.
Diagnosis | O | Not represented | ----- | Optional in ISO
Reaction | RK | Equivalent | reaction | Both have a reaction backbone.
Manifestation of the reaction | RK | Equivalent | reaction.manifestation | Mandatory when reaction present; same concept.
Severity | RK | Equivalent | reaction.severity | Same coded severity concept.
Agent | R | Equivalent | agentOrAllergen | Same backbone for causative substance.
Agent code | R | Equivalent | agentOrAllergen | Same; identifies the substance.
Category | O | Not represented | — | Optional in ISO; could be inferred from the code if needed.

### 📗 EU Patient Summary (EHDS Model) → ISO 27269 Allergies and Intolerances

EU Patient Summary | Relationship | ISO 27269 (IPS)
--- | --- | ---
Element | Relation | Element | Notes
EHDSAllergyIntolerance | Equivalent | Allergies and Intolerances |
header | Partial | — | Administrative header (subject, authoring, status, etc.) not part of ISO 27269 clinical section content.
header.subject | Not represented | — | Patient identification handled elsewhere in ISO 27269 Document Header.
header.identifier | Not represented | — |
header.authorship / author[x] / datetime | Not represented | — | Authorship metadata; ISO 27269 section does not define this.
header.lastUpdate | Not represented | — | Technical metadata.
header.status / statusReason | Not represented | — |
header.language | Not represented | — | Resource-level attributes not defined in ISO section.
agentOrAllergen | Equivalent | Agent code | Same concept; identifies the allergen or causative substance.
typeOfPropensity | Equivalent | Type of propensity | Same concept; distinguishes allergy vs intolerance.
description | Equivalent | Allergy/Intolerance description | Free-text narrative description; same use.
criticality | Equivalent | Criticality | Identical meaning and bindings.
certainty | Equivalent | Certainty | Same semantics (verification status); both optional.
status | Equivalent | Clinical status | Same clinical meaning (active, resolved, etc.).
onsetDate | Equivalent | Onset date | Same element meaning.
endDate | Equivalent | End date | Same element meaning (optional/conditional).
reaction | Equivalent | Reaction | Both models contain reaction backbone.
reaction.manifestation | Equivalent | Manifestation of the reaction | Same clinical concept; coded manifestations.
reaction.date | Not represented | — | ISO 27269 does not define a separate date field; some concerns with the FHIR EU core representation
reaction.severity | Equivalent | Severity | Same coded severity concept.
reaction.onsetDate | Not represented | — | ISO 27269 does not define a separate date field; some concerns with the FHIR EU core representation