MII Implementation Guide Core Dataset Base
2026.0.0 - Release Germany

MII Implementation Guide Core Dataset Base - Local Development build (v2026.0.0) built by the FHIR (HL7® FHIR® Standard) Build Tools. See the Directory of published versions

## Guidance for Implementers

This guide provides essential information for implementing the MII Core Dataset in FHIR-based systems.

#### Understanding the Requirements

1. Logical Models - Business Requirements

The Logical Models contain the business and clinical requirements for each module:

- Person Module - Patient demographics and vital status
- Diagnosis Module - Diagnosis documentation requirements
- Procedure Module - Procedure and intervention documentation
- Treatment Case Module - Encounter management

These models provide a technology-independent view of what data must be captured and exchanged.

2. UML Diagrams - Data Relationships

The UML Diagrams illustrate:

- Relationships between different data elements
- Cardinalities and constraints
- Module dependencies and cross-references

#### Conformance and Implementation Requirements

3. Conformance Rules

Conformance requirements:

- General Requirements - Overall implementation rules and expectations
- Must Support - Critical elements that systems must be able to handle
- Handling Missing Data - Strategies for dealing with incomplete data

These pages define the minimum conformance criteria for claiming compliance with the MII Core Dataset.

4. Technical Artifacts

Implementation artifacts can be found in:

- Profiles and Extensions - FHIR profiles with constraints and extensions
- Terminology - Value sets and code systems
- Capability Statements - Server capability requirements
- Search Parameters and Operations - Required search capabilities
- Examples - Sample resources demonstrating correct implementation

#### Getting Started with Implementation

5. Downloads

Visit the Downloads page to obtain:

- FHIR Package - Complete implementation guide package for validation
- Example Resources - Sample data in JSON and XML formats
- ImplementationGuide Resource - Machine-readable IG definition

#### Validation and Testing

Terminology Services

For terminology validation, use the MII Terminology Service:

- URL: https://www.ontoserver.mii-termserv.de/
- Purpose: ValueSet expansions, code validation, and terminology lookups

Validation Tools

Use the FHIR package with:

- FHIR Validator