# System Actors - WHO SMART Trust v1.4.0

* [**Table of Contents**](toc.md)
* [**Data Models and Exchange**](data_exchange.md)
* **System Actors**

## System Actors

### Actors

Actors produce, manage, or act on health information. Actors relevant to the SMART Trust Network are as follows.

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This actor fulfills the following requirements:

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This actor fulfills the following requirements:

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This actor fulfills the following requirements:

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This actor fulfills the following requirements:

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This actor fulfills the following requirements:

#### Business Rules Library

Trusted service, provided by a node within a trust network, to share business rules using Clinical Quality Language (CQL) specification.

#### Product Catalogue

Used to manage and publish product master data for health products, devices and commodities that may be referenced in a Verifiable Digital Health Certificates.

#### Terminology Service

Used to manage and publish mappings between various local code systems and required vocabularies that are utilized Verifiable Digital Health Certificates.

