The DecisionSupportServiceModule describes a unit of decision support functionality that is made available as a service, such as immunization modules or drug-drug interaction checking.

The metadata for the decision support service module, including publishing, life-cycle, version, documentation, and supporting evidence.

The trigger element defines when the rule should be invoked. This information is used by consumers of the rule to determine how to integrate the rule into a specific workflow.

The parameters to the module. This collection specifies both the input and output parameters. Input parameters are provided by the caller as part of the $evaluate operation. Output parameters are included in the GuidanceResponse.

Data requirements are a machine processable description of the data required by the module in order to perform a successful evaluation.