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From "Thomas Kerpe" <thomas.ke...@googlemail.com>
Subject Re: threaded email view
Date Thu, 27 Nov 2008 22:39:51 GMT
Yeah, you are right.
I find it useful to have a common "thread-id" but this is optional.

//Thomas



2008/11/27 Chris Anderson <jchris@apache.org>

> On Thu, Nov 27, 2008 at 6:06 AM, Thomas Kerpe
> <thomas.kerpe@googlemail.com> wrote:
> >
> > function(doc) {
> >  if (doc.type == "email") {
> >    thread = [];
> >    if (doc.header.references){
> >      thread = doc.header.references.split(" ");
> >    }
> >    thread.push(doc.header['message-id']);
> >    thread_id = thread[0];
> >    emit([thread_id, thread,], doc.header.subject);
> >  }
> > }
> >
> > //Thomas
> >
>
> I'd like to dig into this deeper. I'm not sure I understand what the
> second element in the emitted key is useful for. Could you just
> emit(thread, doc.header.subject) and skip the explicit thread_id?
> Group reduce should will interact nicely with that.
>
> I think this problem is similar to that of storing document versions
> (like for a wiki). Each version must link to it's parent, but also to
> the original version. I'm not familiar enough with email but
> doc.header.references sounds like it can do the job.
>
> I suppose the analog in versioned docs would be keeping a list of the
> chain of parents in each new doc (and not just the head of the chain
> and immediate parent.)
>
> --
> Chris Anderson
> http://jchris.mfdz.com
>

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