HL7 Europe Patient Summary, published by HL7 Europe. This guide is not an authorized publication; it is the continuous build for version 0.0.1-ci 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

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 / language	Not represented	—	Resource-level attributes not defined in ISO section.
agentOrAllergen	Equivalent	Agent / 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; but it is implemented in the FHIR IPS.
reaction.severity	Equivalent	Severity	Same coded severity concept.
reaction.onsetDate	Not represented	—	ISO 27269 does not define a separate date field; but it is implemented in the FHIR IPS.