Represents the identifier used by a activity author to define the activity.

Contains metadata that can be attached to a variety of requests, like starting a workflow, and can be propagated between, for example, workflows and activities.

A user-defined set of *unindexed* fields that are exposed when listing/searching workflows.

Represents some binary (byte array) data (ex: activity input parameters or workflow result) with metadata which describes this binary data (format, encoding, encryption, etc).

See `Payload`.

How retries ought to be handled, usable by both workflows and activities.

A user-defined set of *indexed* fields that are used/exposed when listing/searching workflows.

Identifies a specific workflow within a namespace.

Represents the identifier used by a workflow author to define the workflow.