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# MSC2998: Room Version 7
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A new room version, `7`, is proposed using [room version 6](https://matrix.org/docs/spec/rooms/v6.html) as a base
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and incorporating the following MSCs:
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* [MSC2403](https://github.com/matrix-org/matrix-doc/pull/2403) - Add "knock" feature.
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Though other MSCs are capable of being included in this version, they do not have sufficient implementation to be
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considered for v7 rooms. A future room version may still include them.
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Room version 7 upon being added to the specification shall be considered stable. No other room versions are affected
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by this MSC. Before v7 can enter the specification, MSC2403 needs sufficient review to be eligible to enter the spec
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itself. This MSC is reserving the room version for use in broader testing of MSC2403 - this does not make MSC2403
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stable for use in most implementations.
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## A note on spec process
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The spec core team has accepted "knocking" as a concept, and is generally aligned on the ideas proposed by MSC2403. As
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such, we're going ahead with reserving a room version number early for some broader testing given MSC2403 is near to the
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point of being stable itself. Typically the team would declare a room version number once all the included MSCs are
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eligible for becoming stable, however in this case it's ideal to push ahead and reserve the version number.
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If MSC2403 were to be replaced or otherwise be rejected for some reason, we'd ultimately have a gap in room versions
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which might look weird but does not necessarily have an impact on the specification: room versions have no associative
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ordering, so skipping a perceived sequential version is valid. The sequential versioning is a human ideal, not one of
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the spec.
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