newsgroup vs. mailing list
alex at mindlube.com
Mon Oct 27 18:36:06 EST 2003
On Oct 27, 2003, at 4:11 PM, Robert Brenstein wrote:
> Yes, the in-reply-to and references headers are needed to establish
> parent-child relations but subject selection must be applied first.
The Subject: header does figure prominently in JWZ's threading
algorithm. But you will see the first step in the algorithm is to make
a tree of Container objects based on the References: header.
Somehow Apple's engineers have managed to make a threading algorithm
that can deal with changed Subject lines and still maintain the topic
thread. I am guessing it's the JWZ algorithm but don't know.
I am not advocating that people change Subject lines willy nilly
though. Also I didn't realize until now that the "Re:" part of subjects
is helpful in the threading algorithms too.
Alex Rice <alex at mindlube.com> | Mindlube Software |
what a waste of thumbs that are opposable
to make machines that are disposable -Ani DiFranco
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