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    <p>You've probably done more thinking on this subject than most folks who will try and answer you (part of the reason why it's been a day and I'm your first response, I'd imagine). I'm just going to try and tackle your final three questions, b/c there's just a lot there that I don't have time to go into, and I think those three are the most interesting (the physical implementation questions are probably going to wind up being 'pick something, and then tweak it as you learn more').</p> <p><strong>vote data</strong> Not sure that votes make something more relevant to a search, frankly, just makes them more popular. If that makes sense, I'm trying to say that whether a given post is relevant to your question is mostly independant of whether it was relevant to other people. that said, there's probably at least a weak correlation between interesting questions and those that folks would want to find. Vote data is probably most useful in doing searches based purely on data, e.g. "most popular" type searches. In generic text-based searches, I'd probably not provide any weight for votes at first, but would consider working on an algorithm that perhaps provides a slight weight for the sorting (so, not the results returned, but minor boost to the ordering of them).</p> <p><strong>replies</strong> I'd agree w/ your approach here, subject to some testing; remember that this is going to have to be an iterative process based on user feedback (so you'll need to collect metrics on whether searches returned successful results for the searcher)</p> <p><strong>other</strong> Don't forget the user's score also. So, users get points on SO also, and that influences their default rank in the answers of each question they answer (looks like it's mostly for tiebreaking on replies that have the same number of bumps)</p>
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    1. POHow would one use Lucene.NET to help implement search on a site like Stack Overflow?
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    1. CO@Paul: I've updated the question to reflect how vote data (which is a confidence score) relates to the relevance score as well as thoughts on replies. I don't think I'm going to use the user's reputation to weigh the search sort results, but in terms of tiebreaking replies in terms of votes, it's easy enough to do in SQL Server.
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