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From: David Bremner <david@tethera.net>
To: Daniel Kahn Gillmor <dkg@fifthhorseman.net>,
 Notmuch Mail <notmuch@notmuchmail.org>
Subject: Re: thread merge/split proposal
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 <87k2kdutao.fsf@alice.fifthhorseman.net>
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Daniel Kahn Gillmor <dkg@fifthhorseman.net> writes:

> for (1) i'd propose that the join operation would be implemented by
> adding a new term type "join", which can be applied to any document.
> Its value is the message-id of a message that *should* be "in-reply-to"
> but wasn't.

Having "split" terms or equivalently "signed" +-reference terms would
allow more general thread splitting, effectively updating (via a little
journal of additions and deletions) the references data stored in mail
file.

The implementation cost could not be that much higher than only
join/unjoin; a bit more work managing the terms attached to a document
to avoid contradictions.

Both versions probably complicate some peoples syncing solutions.

d