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Clarify the use of Expires in SUBSCRIBE #406

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Mar 4, 2024
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Clarify the use of Expires in SUBSCRIBE #406

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13 changes: 7 additions & 6 deletions draft-ietf-moq-transport.md
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Original file line number Diff line number Diff line change
Expand Up @@ -628,9 +628,8 @@ For successful subscriptions, the publisher maintains a list of
subscribers for each track. Each new OBJECT belonging to the
track within the subscription range is forwarded to each active
subscriber, dependent on the congestion response. A subscription
remains active until it expires, until the publisher of the track
terminates the track with a SUBSCRIBE_DONE
(see {{message-subscribe-done}}).
remains active until the publisher of the track terminates the
track with a SUBSCRIBE_DONE (see {{message-subscribe-done}}).

Objects MUST NOT be sent for unsuccessful subscriptions, and if a subscriber
receives a SUBSCRIBE_ERROR after receiving objects, it MUST close the session
Expand Down Expand Up @@ -676,7 +675,8 @@ SUBSCRIBE_DONE, as defined below:
|------|---------------------------|
| 0x5 | Going Away |
|------|---------------------------|

| 0x6 | Expired |
|------|---------------------------|

## Publisher Interactions

Expand Down Expand Up @@ -1363,8 +1363,9 @@ SUBSCRIBE_OK
* Subscribe ID: Subscription Identifer as defined in {{message-subscribe-req}}.

* Expires: Time in milliseconds after which the subscription is no
longer valid. A value of 0 indicates that the subscription stays active
until it is explicitly unsubscribed.
longer valid. A value of 0 indicates that the subscription does not expire
or expires at an unknown time. Expires is advisory and a subscription can
end prior to the expiry time or last longer.

* ContentExists: 1 if an object has been published on this track, 0 if not.
If 0, then the Largest Group ID and Largest Object ID fields will not be
Expand Down
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