# Core Models Overview - MyHealth@EU Core v1.0.0

* [**Table of Contents**](toc.md)
* **Core Models Overview**

## Core Models Overview

MyHealth@EU logical models refine the EHDS logical information models provided by the Xt-EHR project. These models use obligations on the logical models to highlight the elements identified by the MyHealth@EU Functional Requirements. Three types of obligations are defined based on the MyHealth@EU requirements:

* **Mandatory**: the data element must be provided
* **Required**: the data element must be provided, although exceptional justifications can be provided
* **Optional**: the data element can be completely omitted

These obligations are implemented using the following rule sets:

* `ObligationMandatory` - SHALL:handle for mandatory elements
* `ObligationRequired` - SHOULD:handle for required elements
* `ObligationOptional` - MAY:able-to-populate for optional elements

### Information Models

The following diagram provides an overview of the MyHealth@EU core models and their relationships.

### Foundational Models

* [MyHealth@EU Human Name](StructureDefinition-MyHealthEuHumanName.md)
* [MyHealth@EU Address](StructureDefinition-MyHealthEuAddress.md)
* [MyHealth@EU Telecom](StructureDefinition-MyHealthEuTelecom.md)
* [MyHealth@EU Body Structure](StructureDefinition-MyHealthEuBodyStructure.md)

### Entity Models

* [MyHealth@EU Patient](StructureDefinition-MyHealthEuPatient.md)
* [MyHealth@EU Health Professional](StructureDefinition-MyHealthEuHealthProfessional.md)
* [MyHealth@EU Organisation](StructureDefinition-MyHealthEuOrganisation.md)
* [MyHealth@EU Related Person](StructureDefinition-MyHealthEuRelatedPerson.md)
* [MyHealth@EU Location](StructureDefinition-MyHealthEuLocation.md)

### Clinical Information Models

* [MyHealth@EU Allergy Intolerance](StructureDefinition-MyHealthEuAllergyIntolerance.md)
* [MyHealth@EU Condition](StructureDefinition-MyHealthEuCondition.md)
* [MyHealth@EU Immunisation](StructureDefinition-MyHealthEuImmunisation.md)
* [MyHealth@EU Procedure](StructureDefinition-MyHealthEuProcedure.md)

### Document Models

* [MyHealth@EU Document](StructureDefinition-MyHealthEuDocument.md)

### Medication Models

* [MyHealth@EU Medication](StructureDefinition-MyHealthEuMedication.md)
* [MyHealth@EU Medication Statement](StructureDefinition-MyHealthEuMedicationStatement.md)

### Other Models

* [MyHealth@EU Device](StructureDefinition-MyHealthEuDevice.md)

### Supporting Information

* [MyHealth@EU Requirements](https://webgate.ec.europa.eu/fpfis/wikis/x/e_HzN)
* [EHDS Logical Information Models](http://www.xt-ehr.eu/fhir/models/ImplementationGuide/xtehr.eu.ehds.models)

