Let's assume that for technology XYZ there are fair amount of questions and some tags on StackOverflow already. Then at some point someone attempts to create a dedicated XYZ Q&A site here.

  • will the existing questions make any difference in regards to the judgement of the site usefulness (while going through Definition, Commitment, Beta stages)?
  • should/can existing questions be moved/copied to the new site?
  • once the new site is approved and public, is there a way to let people posting questions on StackOverflow with particular tag know there is dedicated Q&A site?

Let's assume there are fair amount of questions on StackOverflow already.

Then it would be closed as a duplicate.

Area 51 is meant to create sites in subjects not already covered elsewhere. We do not split off subjects simply to give them their own space.

Apparently this is a dulicate

should/can existing questions be moved/copied to the new site?

Even if a new site's scope manages to overlap a bit with an existing site, we have no cause to remove content from an active site and the reputation that goes with it.

Policy on Bulk Migrations

  • Hi Robert, thanks for your answer. One thing I'm a bit confused is the "duplicate" decision. As the scope of StackOverflow is so broad, I guess anything software related could be considered duplicate. Is there any threshold, metrics, ... to look for that would give me an idea wether it makes sense to try to create a dedicated site? The context is, we are considering moving community support from our existing forums to StackExchnage. Many people are not convinced if this makes sense and I'm just investigating the options, pros and cos. – Milen Dyankov Jul 14 '17 at 14:30
  • @MilenDyankov The best guidance I can offer is that we create new sites when there is sufficient support for a subject (a comprehensive body of questions) that cannot be asked elsewhere. Stack Overflow is huge. It covers an enormous array of subjects of interest to developers. If we are talking about a programming tool or framework, it is highly unlikely we would spit it off simply to give the subject its own space. You may also want to take a look at — How can I use Stack Overflow to support our developer community? – Robert Cartaino Jul 14 '17 at 15:17

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