Schemas

The Schemas tab displays all message schemas registered with your cluster's Schema Registry.

Schemas tab listing registered schemas, latest versions, and compatibility modes

Overview

Lists all registered schemas with:

• Subject: the subject name used to register the schema (typically <topic>-key or <topic>-value).
• Latest version: the most recent schema version number.
• Compatibility: the evolution rule applied to this subject, Backward, Forward, or Full.
• Format: the schema format, JSON, AVRO, or PROTOBUF.

Select the eye icon to view a schema's full definition, or Publish schema to register a new one. Use this view to track which topics have governed message formats and verify schema coverage before creating API Products.

Compatibility Modes

Mode	Description
Backward	New schema can read data written by the old schema. Consumers can upgrade first.
Forward	Old schema can read data written by the new schema. Producers can upgrade first.
Full	Both backward and forward compatible. Safest for shared APIs.
None	No compatibility enforced.

Tips

For API Products published through Zilla Console, Full compatibility is recommended to avoid breaking changes for consumers.

Overrides

Subjects can override the cluster-wide default compatibility mode. Overrides appear in the Schemas list alongside the subject they apply to.

Use overrides sparingly. They bypass global governance rules and should be documented as exceptions.