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When writing a new question, a very useful list Questions with similar titles appears. As far as I know this list contains titles from the site where you are at that moment. Would it be feasible to extend this list with questions from other sites?

The reason why I ask is that I recently got an answer to this question at Stack Overflow. The answer linked to dba.stackexchange.com. As database design is not my core business I had never noticed this site before. By the way, Stack Overflow's faq section on what not to ask does not (yet?) refer to it.

So cross-site "similar titles" either could have given me a spot-on duplicate (even an instant answer!) or otherwise have guided me to a more appropriate site for my question.

Maybe migration paths can be used to limit the number of sites to search through.

Related questions, but not the same:

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I am not sure if migration paths can be helpful; Drupal Answers is not in the migration path for Stack Overflow, but there are some questions that are asked in both the sites. –  kiamlaluno Feb 21 '12 at 17:44
    
you mean for example if some going to ask a question on programming about bitmap images to get similar questions about images from the photographers ? –  Aristos Feb 21 '12 at 17:55
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Given the Gaming community's propensity to post questions with absurd titles when taken out of context, that site is probably going to come up on a lot of other sites for the wrong reasons. –  BoltClock's a Unicorn Feb 21 '12 at 17:57
    
@Aristos. A programming question on images (best way to store images in a database) is not likely to get any hits at photographers. If it does, some question is misplaced. –  Gert Arnold Feb 21 '12 at 18:00
    
@BoltClock'saUnicorn. That's a good point. Hard to tackle. Maybe there it could help to look at relates sites. Too bad though if there is a migration path to gaming. –  Gert Arnold Feb 21 '12 at 18:04
    
@GertArnold If they never get this two connected (programming+photographer) then they should not be connected. So you speak for only two or three connection, programming with database and maybe code improve. –  Aristos Feb 21 '12 at 18:06
    
@Aristos And the four sites refered to in the faq. I'm trying to find a way to guide people to the best site for their questions. If so far it would only work for the programming-related sites, I'd be happy enough. –  Gert Arnold Feb 21 '12 at 18:14
    
@GertArnold Then the way you say it I think of a better idea. A GLOBAL BOX of what ever question, and there this global question box (a google search style page for example) can locate all the possible topics around Sacks. –  Aristos Feb 21 '12 at 18:18
    
a global page similar to the print page, that can ask anything... and there maybe can suggest sites under that this question can fit... And a global site page for search all on stack ? hmmm google.... –  Aristos Feb 21 '12 at 18:20
    
This sounds kind of similar to something I mentioned at the end of my question here: meta.stackexchange.com/q/117454/148400 –  David Feb 21 '12 at 18:58
    
@David. Funny that I did not find your question when I wrote mine. I spent quite some time searching. No need to mention that I like your approach there. –  Gert Arnold Feb 21 '12 at 19:33

1 Answer 1

up vote 8 down vote accepted

This could be problematic for a number of reasons:

  1. For "close as duplicate" purposes, there is no such thing as a cross-site duplicate.
  2. Questions from other sites are asked in a different context. There's no real expectation that such questions would have similar answers.
  3. Queries like this would be extremely expensive; SE sites are not always on the same database server.
share|improve this answer
    
The last point is a real killer! Probably terminal. The other two points could be dealt with I think. –  Gert Arnold Feb 21 '12 at 18:19
    
Can we ask for cross-site duplicates? I've wanted that vote-to-close before... –  sarnold Feb 22 '12 at 2:19

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