Model Repository Service
The Catalog Service connects to the Model Repository Service to access resource configuration and data domain information from the Model repository. When you create the Catalog Service, you provide the name of the Model Repository Service.
Data Integration Service
The Catalog Service connects to the Data Integration Service to perform jobs, such as generating profile statistics for the resources. When you create the Catalog Service, you provide the name of the Data Integration Service.
Informatica Cluster Service
If you installed Enterprise Data Catalog on the internal cluster, the Catalog Service connects to Informatica Cluster Service to administer and manage all the internal Hadoop cluster services, Apache Ambari server, and Apache Ambari agents. When you create the Catalog Service for an internal cluster deployment, you need to provide the name of the Informatica Cluster Service.
Content Management Service
The Catalog Service uses the Content Management Service to fetch reference data for data domains that use reference tables. When you create the Catalog Service, you can optionally provide the name of the Content Management Service.