## CDSS Request Input parameter

{{link:EviPrevIt/eviprevReferralRequest}} to perform CDSS request.

{{structure:EviPrevIt/eviprevReferralRequest}}

Only the parameters below are required. All other parameters are ignored and not validated.

### status

Must always be "active".

### intent

Must always be "order".

### serviceRequested

You have to specifiy the required service. Following services are possible:

* Topic selection (code = "topic-selection")
The Topic Selection can be used to query the rules that are relevant for the given (observation) parameters. 

* Risk assessement (code = "risk-assessment")
The Risk assessement calculates the corresponding risk for each rule based on the given (observation) parameters.

If a relevant parameter for calculating a rule is missing, it is not executed and a corresponding message will be returned.

### subject

The topic must be a contained {{pagelink:EviPrevIt/eviprevpatientprofile}} resource with at least following fields:

* gender
* birthDate

### supportingInfo

A list of contained {{pagelink:EviPrevIt/eviprevobservationprofile}} resources.

Requried observations: 

* {{pagelink:EviPrevIt/cdssrequesttopicselection}}
* {{pagelink:EviPrevIt/cdssrequestriskassessment}}


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