Open Metadata Access Services (OMAS)

The Open Metadata Access Services (OMAS) provide domain-specific services for data tools, engines and platforms to integrate with open metadata.

The access services are as follows:

Using the OMASs

The OMASs run in either a Metadata Access Point or a Metadata Server. They can be configured and activated individually or as a complete set. The administration services provide the ability to configure, start and stop the access services.

Each OMAS typically supports a REST API, a topic where it publishes notifications of interest to its users, and a topic where new metadata requests can be posted to the OMAS.

It also has a Java client that provides access to its API and topics. This java client is embedded in the Governance Servers and View Servers. They can also be downloaded and used independently with the Egeria Client Package.

This is illustrated in Figure 1:

Figure 1

Figure 1: Structure of an Open Metadata Access Service (OMAS)

Digging deeper


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License: CC BY 4.0, Copyright Contributors to the ODPi Egeria project.