✦TL;DR

Learn about the composition of custom metadata structures in Atlan and how to create them programmatically.

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Custom metadata structures overview

Custom metadata in Atlan is structurally composed of two levels:

1. The custom metadata definition (sometimes referred to as set) itself, defined as a CustomMetadataDef
2. The attributes (or properties) within that custom metadata set, each defined as an AttributeDef

Through Atlan's APIs, you can create your own custom metadata sets and attributes programmatically.

Once the structures exist, you can then also change custom metadata values on assets themselves.