The acknowledged subset for a single subscriptions/listen request's filter,
built from exactly that one stream's opt-in (draft basic/utilities/subscriptions
Acknowledgment). Each subscription is independent — identified by its own listen
request id (§Multiple Concurrent Subscriptions) — so the ack a transport sends as
the first event on a stream MUST reflect only THAT request's opt-in, never the
server-wide accumulation across other (or already-closed) concurrent streams.
The three list-changed types appear as booleans ({ "<type>": true }) and
resourceSubscriptions as the agreed string[] of URIs; an empty object when
the filter opted into nothing.
The acknowledged subset for a single subscriptions/listen request's filter, built from exactly that one stream's opt-in (draft basic/utilities/subscriptions Acknowledgment). Each subscription is independent — identified by its own listen request id (§Multiple Concurrent Subscriptions) — so the ack a transport sends as the first event on a stream MUST reflect only THAT request's opt-in, never the server-wide accumulation across other (or already-closed) concurrent streams. The three list-changed types appear as booleans ({ "<type>": true }) and resourceSubscriptions as the agreed string[] of URIs; an empty object when the filter opted into nothing.