EHDS Logical Information Models
0.4.0 - draft

EHDS Logical Information Models, published by Xt-EHR. This guide is not an authorized publication; it is the continuous build for version 0.4.0 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

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Official URL: http://www.xt-ehr.eu/fhir/models/ImplementationGuide/xtehr.eu.ehds.models | Version: 0.4.0
Draft as of 2026-02-23 | Computable Name: EHDSModels

This is the second preview release of the EHDS Logical Information Models developed under the Xt-EHR Joint Action. This is a release candidate version and may be subject to future refinement.

### Introduction

This implementation guide includes logical information models created in Xt-EHR project. These models are the basis for designing the EHDS data exchange format (EEHRxF).

### Specification

This guide includes EHDS models for all the priority categories, and many of the models are shared between use cases.

HL7 FHIR Implementation Guides for the EEHRxF are created in cooperation with other EU projects working on EHDS implementation (please find the links under specific use cases).

Logical Information Models IG should be used as a basis for all the use cases to make sure common data objects (patient, medication, etc) are modelled in a consistent way. Use case specific FHIR implementation guides shall include mappings to the models.

The principles of metada management, including information models, are described in Xt-EHR Metadata IG.

Content of the guide is based on many earlier works. Common sources for all use cases include:

- eHealth Network guidelines (including the results from eHN Subgroup of Semantics guideline consistency task force);
- MyHealth@EU requirements catalogue;
- X-eHealth project;
- XpanDH project.

### Authors and contributors

This Implementation Guide is a work result across different work packages:

- WP5 Task 5.4 "Metadata management",
- WP6 Task 6.1 "Patient Summary",
- WP6 Task 6.2 "ePrescription and eDispensation",
- WP7 Task 7.1 "Medical Results and Reports",
- WP7 Task 7.2 "Medical Images and Reports",
- WP7 Task 7.3 "Discharge Reports".

In order to contribute to the Logical Information Models IG authoring, do one of the following:

- as a project participant, join any of the tasks mentioned above for discussing the content;
- as a project participant, join the IG authoring group by creating a GitHub issue with access request;
- as an interested stakeholder, review the work in the draft IG and give feedback in GitHub issues;
- as a FHIR implementer, join any of the HL7 Europe working groups for specific use cases.