In a CQRS architecture it typically means operations performed by the query-side of the application.
Simply pass a zero, or exclude the parameter from the request to receive everything since the beginning.
sequenceNumber of the last received event as a
since parameter to limit the response to only include events since then.
It’s possible to get all events within a given period by specifying the from/to date/time range.
Default value for
now, if not specified in the request. The string should follow the
ISO 8601 format specified in RFC 3339, section 5.6