# Search Parameters and Operations - MII Implementation Guide Core Dataset Base v2026.0.1

## Search Parameters and Operations

### Search Parameters and Operations

This page describes the search capabilities and operations defined for the MII Core Dataset Base modules.

#### Search Parameters

The MII Core Dataset utilizes both standard FHIR search parameters and custom search parameters to enable efficient querying of clinical data.

**Standard FHIR Search Parameters**

All base FHIR search parameters defined in the FHIR R4 specification SHOULD be supported by implementations. See the [FHIR Search specification](http://hl7.org/fhir/R4/search.html) for complete details.

**Module-Specific Search Requirements**

The relevant search parameters required for each module are listed in the respective Capability Statements:

* [Person Module Capability Statement](CapabilityStatement-mii-cps-person-capabilitystatement.md)
* [Diagnosis Module Capability Statement](CapabilityStatement-mii-cps-diagnose-capabilitystatement.md)
* [Procedure Module Capability Statement](CapabilityStatement-mii-cps-prozedur-capabilitystatement.md)
* [Treatment Case Module Capability Statement](CapabilityStatement-mii-cps-fall-capabilitystatement.md)

**Custom Search Parameters**

Custom SearchParameter resources specific to the MII Core Dataset are published in the **MII Meta Module**:

* **Simplifier Project:** [MedizininformatikInitiative-Kerndatensatz](https://simplifier.net/MedizininformatikInitiative-Kerndatensatz)
* **Purpose:** Enable specialized queries relevant to research use cases

Implementers should review the Meta Module for any custom SearchParameter definitions that extend standard FHIR search capabilities.

#### Operations

There are currently **no custom operations** defined in this module.

