EventHeaders
EventHeaders is a generic term used in event-driven architectures to refer to the metadata associated with an event, separate from the event payload. They accompany events as they move between producers and consumers, enabling routing, filtering, correlation, and auditing. Headers are typically key-value pairs and may be serialized in headers, message envelopes, or storefronts depending on transport.
Typical fields include: type (event type or name), source (originating system or component), timestamp (when produced),
Relationship to standards: CloudEvents defines a standardized set of attributes for event metadata, and many message
Usage and design: Keep headers small and immutable once published, avoid sensitive data, and version headers
Variants and examples: In HTTP, headers like ce-type, ce-source, ce-id (CloudEvents style). In messaging systems, headers