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Clarify multiple transport streams for Subgroups #642

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5 changes: 3 additions & 2 deletions draft-ietf-moq-transport.md
Original file line number Diff line number Diff line change
Expand Up @@ -329,8 +329,9 @@ Objects within a group are ordered numerically by their Object ID.
A subgroup is a sequence of one or more objects from the same group
({{model-group}}) in ascending order by Object ID. Objects in a subgroup
have a dependency and priority relationship consistent with sharing a QUIC
stream. In some cases, a Group will be most effectively delivered using more
than one QUIC stream.
stream. A Group will be delivered using at least as many QUIC streams as
there are Subgroups, with a typically one-to-one mapping between Subgroups
and QUIC streams.
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When a Track's forwarding preference (see {{object-fields}}) is "Track" or
"Datagram", Objects are not sent in Subgroups, no Subgroup IDs are assigned, and the
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